Common Weakness Enumeration
CWE-367
AllowedTime-of-check Time-of-use (TOCTOU) Race Condition
Abstraction: Base · Status: Incomplete
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.
1063 vulnerabilities reference this CWE, most recent first.
CVE-2020-12926 (GCVE-0-2020-12926)
Vulnerability from cvelistv5 – Published: 2020-11-12 19:08 – Updated: 2024-08-04 12:11
VLAI
EPSS
VEX
Summary
The Trusted Platform Modules (TPM) reference software may not properly track the number of times a failed shutdown happens. This can leave the TPM in a state where confidential key material in the TPM may be able to be compromised. AMD believes that the attack requires physical access of the device because the power must be repeatedly turned on and off. This potential attack may be used to change confidential information, alter executables signed by key material in the TPM, or create a denial of service of the device.
Severity
No CVSS data available.
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.amd.com/en/corporate/product-security | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | AMD's fTPM implementation |
Affected:
Each Linux distro determines its own version.
|
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T12:11:19.071Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.amd.com/en/corporate/product-security"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "AMD\u0027s fTPM implementation",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Each Linux distro determines its own version."
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The Trusted Platform Modules (TPM) reference software may not properly track the number of times a failed shutdown happens. This can leave the TPM in a state where confidential key material in the TPM may be able to be compromised. AMD believes that the attack requires physical access of the device because the power must be repeatedly turned on and off. This potential attack may be used to change confidential information, alter executables signed by key material in the TPM, or create a denial of service of the device."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-11-12T19:08:52.000Z",
"orgId": "b58fc414-a1e4-4f92-9d70-1add41838648",
"shortName": "AMD"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.amd.com/en/corporate/product-security"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "psirt@amd.com",
"ID": "CVE-2020-12926",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "AMD\u0027s fTPM implementation",
"version": {
"version_data": [
{
"version_value": "Each Linux distro determines its own version."
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The Trusted Platform Modules (TPM) reference software may not properly track the number of times a failed shutdown happens. This can leave the TPM in a state where confidential key material in the TPM may be able to be compromised. AMD believes that the attack requires physical access of the device because the power must be repeatedly turned on and off. This potential attack may be used to change confidential information, alter executables signed by key material in the TPM, or create a denial of service of the device."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.amd.com/en/corporate/product-security",
"refsource": "MISC",
"url": "https://www.amd.com/en/corporate/product-security"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "b58fc414-a1e4-4f92-9d70-1add41838648",
"assignerShortName": "AMD",
"cveId": "CVE-2020-12926",
"datePublished": "2020-11-12T19:08:52.000Z",
"dateReserved": "2020-05-15T00:00:00.000Z",
"dateUpdated": "2024-08-04T12:11:19.071Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8873 (GCVE-0-2020-8873)
Vulnerability from cvelistv5 – Published: 2020-03-23 17:30 – Updated: 2024-08-04 10:12
VLAI
EPSS
VEX
Summary
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.2-47123. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the xHCI component. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor. Was ZDI-CAN-10031.
Severity
8.2 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T10:12:10.985Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-20-294/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Desktop",
"vendor": "Parallels",
"versions": [
{
"status": "affected",
"version": "15.1.2-47123"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Reno Robert"
}
],
"descriptions": [
{
"lang": "en",
"value": "This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.2-47123. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the xHCI component. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor. Was ZDI-CAN-10031."
}
],
"metrics": [
{
"cvssV3_0": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
"version": "3.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-03-23T17:30:21.000Z",
"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
"shortName": "zdi"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-20-294/"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "zdi-disclosures@trendmicro.com",
"ID": "CVE-2020-8873",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Desktop",
"version": {
"version_data": [
{
"version_value": "15.1.2-47123"
}
]
}
}
]
},
"vendor_name": "Parallels"
}
]
}
},
"credit": "Reno Robert",
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.2-47123. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the xHCI component. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor. Was ZDI-CAN-10031."
}
]
},
"impact": {
"cvss": {
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
"version": "3.0"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.zerodayinitiative.com/advisories/ZDI-20-294/",
"refsource": "MISC",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-20-294/"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
"assignerShortName": "zdi",
"cveId": "CVE-2020-8873",
"datePublished": "2020-03-23T17:30:22.000Z",
"dateReserved": "2020-02-11T00:00:00.000Z",
"dateUpdated": "2024-08-04T10:12:10.985Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8867 (GCVE-0-2020-8867)
Vulnerability from cvelistv5 – Published: 2020-04-22 20:51 – Updated: 2024-08-04 10:12
VLAI
EPSS
VEX
Summary
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.
Severity
5.3 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
| https://opcfoundation.org/SecurityBulletins/OPC%2… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OPC Foundation | UA .NET Standard |
Affected:
1.04.358.30
|
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T10:12:11.060Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-20-536/"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "UA .NET Standard",
"vendor": "OPC Foundation",
"versions": [
{
"status": "affected",
"version": "1.04.358.30"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Steven Seeley (mr_me) and Chris Anastasio (muffin)"
}
],
"descriptions": [
{
"lang": "en",
"value": "This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295."
}
],
"metrics": [
{
"cvssV3_0": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-04-22T20:51:07.000Z",
"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
"shortName": "zdi"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-20-536/"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "zdi-disclosures@trendmicro.com",
"ID": "CVE-2020-8867",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "UA .NET Standard",
"version": {
"version_data": [
{
"version_value": "1.04.358.30"
}
]
}
}
]
},
"vendor_name": "OPC Foundation"
}
]
}
},
"credit": "Steven Seeley (mr_me) and Chris Anastasio (muffin)",
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295."
}
]
},
"impact": {
"cvss": {
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.0"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.zerodayinitiative.com/advisories/ZDI-20-536/",
"refsource": "MISC",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-20-536/"
},
{
"name": "https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf",
"refsource": "MISC",
"url": "https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
"assignerShortName": "zdi",
"cveId": "CVE-2020-8867",
"datePublished": "2020-04-22T20:51:07.000Z",
"dateReserved": "2020-02-11T00:00:00.000Z",
"dateUpdated": "2024-08-04T10:12:11.060Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8833 (GCVE-0-2020-8833)
Vulnerability from cvelistv5 – Published: 2020-04-22 21:15 – Updated: 2024-09-16 20:53
VLAI
EPSS
VEX
Title
Apport race condition in crash report permissions
Summary
Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.
Severity
5.6 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/4315-1/ | x_refsource_CONFIRM |
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4315-2/ | vendor-advisoryx_refsource_UBUNTU |
Impacted products
Date Public
2020-04-02 00:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T10:12:10.622Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://usn.ubuntu.com/4315-1/"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933"
},
{
"name": "USN-4315-2",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU",
"x_transferred"
],
"url": "https://usn.ubuntu.com/4315-2/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Apport",
"vendor": "Canonical",
"versions": [
{
"lessThan": "2.20.1-0ubuntu2.23",
"status": "affected",
"version": "2.20.1",
"versionType": "custom"
},
{
"lessThan": "2.20.9-0ubuntu7.14",
"status": "affected",
"version": "2.20.9",
"versionType": "custom"
},
{
"changes": [
{
"at": "2.20.11-0ubuntu22",
"status": "unaffected"
}
],
"lessThan": "2.20.11-0ubuntu8.8",
"status": "affected",
"version": "2.20.11",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Maximilien Bourgeteau"
}
],
"datePublic": "2020-04-02T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-06-24T20:06:03.000Z",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://usn.ubuntu.com/4315-1/"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933"
},
{
"name": "USN-4315-2",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU"
],
"url": "https://usn.ubuntu.com/4315-2/"
}
],
"source": {
"advisory": "https://usn.ubuntu.com/4315-1/",
"defect": [
"https://launchpad.net/bugs/1862933"
],
"discovery": "EXTERNAL"
},
"title": "Apport race condition in crash report permissions",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"AKA": "",
"ASSIGNER": "security@ubuntu.com",
"DATE_PUBLIC": "2020-04-02T00:43:00.000Z",
"ID": "CVE-2020-8833",
"STATE": "PUBLIC",
"TITLE": "Apport race condition in crash report permissions"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Apport",
"version": {
"version_data": [
{
"platform": "",
"version_affected": "\u003c",
"version_name": "2.20.1",
"version_value": "2.20.1-0ubuntu2.23"
},
{
"platform": "",
"version_affected": "\u003c",
"version_name": "2.20.9",
"version_value": "2.20.9-0ubuntu7.14"
},
{
"platform": "",
"version_affected": "\u003c",
"version_name": "2.20.11",
"version_value": "2.20.11-0ubuntu8.8"
},
{
"platform": "",
"version_affected": "\u003c",
"version_name": "2.20.11",
"version_value": "2.20.11-0ubuntu22"
}
]
}
}
]
},
"vendor_name": "Canonical"
}
]
}
},
"configuration": [],
"credit": [
{
"lang": "eng",
"value": "Maximilien Bourgeteau"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22."
}
]
},
"exploit": [],
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://usn.ubuntu.com/4315-1/",
"refsource": "CONFIRM",
"url": "https://usn.ubuntu.com/4315-1/"
},
{
"name": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933",
"refsource": "CONFIRM",
"url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933"
},
{
"name": "USN-4315-2",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/4315-2/"
}
]
},
"solution": [],
"source": {
"advisory": "https://usn.ubuntu.com/4315-1/",
"defect": [
"https://launchpad.net/bugs/1862933"
],
"discovery": "EXTERNAL"
},
"work_around": []
}
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2020-8833",
"datePublished": "2020-04-22T21:15:18.859Z",
"dateReserved": "2020-02-10T00:00:00.000Z",
"dateUpdated": "2024-09-16T20:53:27.660Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8562 (GCVE-0-2020-8562)
Vulnerability from cvelistv5 – Published: 2022-02-01 10:33 – Updated: 2026-06-01 21:45
VLAI
EPSS
VEX
Title
Bypass of Kubernetes API Server proxy TOCTOU
Summary
As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://kubernetes.io/blog/2026/05/26/reconciling… | x_refsource_MISC |
| https://github.com/kubernetes/kubernetes/issues/101493 | x_refsource_MISC |
| https://groups.google.com/g/kubernetes-security-a… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2022022… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Kubernetes | Kubernetes |
Affected:
0 , < *
(semver)
|
Date Public
2021-05-04 00:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T10:03:46.172Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/kubernetes/kubernetes/issues/101493"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20220225-0002/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Kubernetes",
"vendor": "Kubernetes",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Javier Provecho"
}
],
"datePublic": "2021-05-04T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 2.2,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-01T21:45:40.339Z",
"orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
"shortName": "kubernetes"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/kubernetes/kubernetes/issues/101493"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://security.netapp.com/advisory/ntap-20220225-0002/"
}
],
"source": {
"defect": [
"https://github.com/kubernetes/kubernetes/issues/101493"
],
"discovery": "EXTERNAL"
},
"title": "Bypass of Kubernetes API Server proxy TOCTOU",
"workarounds": [
{
"lang": "en",
"value": "If this issue affects your clusters\u2019 control planes, you can use dnsmasq for name resolution and configure the min-cache-ttl and neg-ttl parameters to a low non-zero value to enforce cached replies for proxied connections"
}
],
"x_generator": {
"engine": "Vulnogram 0.0.9"
}
}
},
"cveMetadata": {
"assignerOrgId": "a6081bf6-c852-4425-ad4f-a67919267565",
"assignerShortName": "kubernetes",
"cveId": "CVE-2020-8562",
"datePublished": "2022-02-01T10:33:00.317Z",
"dateReserved": "2020-02-03T00:00:00.000Z",
"dateUpdated": "2026-06-01T21:45:40.339Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2020-8354 (GCVE-0-2020-8354)
Vulnerability from cvelistv5 – Published: 2020-11-11 17:35 – Updated: 2024-08-04 09:56
VLAI
EPSS
VEX
Summary
A potential vulnerability in the SMI callback function used in the VariableServiceSmm driver in some Lenovo Notebook models may allow arbitrary code execution.
Severity
6.4 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://support.lenovo.com/us/en/product_security… | x_refsource_MISC |
Impacted products
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T09:56:28.369Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.lenovo.com/us/en/product_security/LEN-49266"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "BIOS",
"vendor": "Lenovo",
"versions": [
{
"lessThan": "various",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Lenovo thanks yngwei (@yngweijw) of IIE VARAS"
}
],
"descriptions": [
{
"lang": "en",
"value": "A potential vulnerability in the SMI callback function used in the VariableServiceSmm driver in some Lenovo Notebook models may allow arbitrary code execution."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-11-11T17:35:18.000Z",
"orgId": "da227ddf-6e25-4b41-b023-0f976dcaca4b",
"shortName": "lenovo"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.lenovo.com/us/en/product_security/LEN-49266"
}
],
"solutions": [
{
"lang": "en",
"value": "Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-49266."
}
],
"source": {
"advisory": "LEN-49266",
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "psirt@lenovo.com",
"ID": "CVE-2020-8354",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "BIOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "various"
}
]
}
}
]
},
"vendor_name": "Lenovo"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Lenovo thanks yngwei (@yngweijw) of IIE VARAS"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A potential vulnerability in the SMI callback function used in the VariableServiceSmm driver in some Lenovo Notebook models may allow arbitrary code execution."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://support.lenovo.com/us/en/product_security/LEN-49266",
"refsource": "MISC",
"url": "https://support.lenovo.com/us/en/product_security/LEN-49266"
}
]
},
"solution": [
{
"lang": "en",
"value": "Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-49266."
}
],
"source": {
"advisory": "LEN-49266",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "da227ddf-6e25-4b41-b023-0f976dcaca4b",
"assignerShortName": "lenovo",
"cveId": "CVE-2020-8354",
"datePublished": "2020-11-11T17:35:18.000Z",
"dateReserved": "2020-01-28T00:00:00.000Z",
"dateUpdated": "2024-08-04T09:56:28.369Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8342 (GCVE-0-2020-8342)
Vulnerability from cvelistv5 – Published: 2020-09-15 14:20 – Updated: 2024-09-17 00:01
VLAI
EPSS
VEX
Summary
A race condition vulnerability was reported in Lenovo System Update prior to version 5.07.0106 that could allow escalation of privilege.
Severity
7.3 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://support.lenovo.com/us/en/product_security… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Lenovo | System Update |
Affected:
unspecified , < 5.07.0106
(custom)
|
Date Public
2020-09-15 00:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T09:56:28.350Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.lenovo.com/us/en/product_security/LEN-42150"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "System Update",
"vendor": "Lenovo",
"versions": [
{
"lessThan": "5.07.0106",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Lenovo thanks Security Advisor, Anders Kusk, Improsec ApS for reporting this issue."
}
],
"datePublic": "2020-09-15T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A race condition vulnerability was reported in Lenovo System Update prior to version 5.07.0106 that could allow escalation of privilege."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-09-15T14:20:17.000Z",
"orgId": "da227ddf-6e25-4b41-b023-0f976dcaca4b",
"shortName": "lenovo"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.lenovo.com/us/en/product_security/LEN-42150"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to the Lenovo System Update version 5.07.0106 (or newer)."
}
],
"source": {
"advisory": "LEN-42150",
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "psirt@lenovo.com",
"DATE_PUBLIC": "2020-09-15T16:00:00.000Z",
"ID": "CVE-2020-8342",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "System Update",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "5.07.0106"
}
]
}
}
]
},
"vendor_name": "Lenovo"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Lenovo thanks Security Advisor, Anders Kusk, Improsec ApS for reporting this issue."
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A race condition vulnerability was reported in Lenovo System Update prior to version 5.07.0106 that could allow escalation of privilege."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://support.lenovo.com/us/en/product_security/LEN-42150",
"refsource": "MISC",
"url": "https://support.lenovo.com/us/en/product_security/LEN-42150"
}
]
},
"solution": [
{
"lang": "en",
"value": "Upgrade to the Lenovo System Update version 5.07.0106 (or newer)."
}
],
"source": {
"advisory": "LEN-42150",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "da227ddf-6e25-4b41-b023-0f976dcaca4b",
"assignerShortName": "lenovo",
"cveId": "CVE-2020-8342",
"datePublished": "2020-09-15T14:20:18.072Z",
"dateReserved": "2020-01-28T00:00:00.000Z",
"dateUpdated": "2024-09-17T00:01:40.101Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8332 (GCVE-0-2020-8332)
Vulnerability from cvelistv5 – Published: 2020-10-14 21:25 – Updated: 2024-08-04 09:56
VLAI
EPSS
VEX
Summary
A potential vulnerability in the SMI callback function used in the legacy BIOS mode USB drivers in some legacy Lenovo and IBM System x servers may allow arbitrary code execution. Servers operating in UEFI mode are not affected.
Severity
6.4 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://support.lenovo.com/us/en/product_security… | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T09:56:28.331Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.lenovo.com/us/en/product_security/LEN-38625"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "System x",
"vendor": "Lenovo",
"versions": [
{
"status": "affected",
"version": "various"
}
]
},
{
"product": "System x",
"vendor": "IBM",
"versions": [
{
"status": "affected",
"version": "various"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A potential vulnerability in the SMI callback function used in the legacy BIOS mode USB drivers in some legacy Lenovo and IBM System x servers may allow arbitrary code execution. Servers operating in UEFI mode are not affected."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-10-14T21:25:19.000Z",
"orgId": "da227ddf-6e25-4b41-b023-0f976dcaca4b",
"shortName": "lenovo"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.lenovo.com/us/en/product_security/LEN-38625"
}
],
"solutions": [
{
"lang": "en",
"value": "Update system firmware to the version (or newer) indicated for your model in the Product Impact section in LEN-38625."
}
],
"source": {
"advisory": "LEN-38625",
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "psirt@lenovo.com",
"ID": "CVE-2020-8332",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "System x",
"version": {
"version_data": [
{
"version_affected": "=",
"version_value": "various"
}
]
}
}
]
},
"vendor_name": "Lenovo"
},
{
"product": {
"product_data": [
{
"product_name": "System x",
"version": {
"version_data": [
{
"version_affected": "=",
"version_value": "various"
}
]
}
}
]
},
"vendor_name": "IBM"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A potential vulnerability in the SMI callback function used in the legacy BIOS mode USB drivers in some legacy Lenovo and IBM System x servers may allow arbitrary code execution. Servers operating in UEFI mode are not affected."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://support.lenovo.com/us/en/product_security/LEN-38625",
"refsource": "MISC",
"url": "https://support.lenovo.com/us/en/product_security/LEN-38625"
}
]
},
"solution": [
{
"lang": "en",
"value": "Update system firmware to the version (or newer) indicated for your model in the Product Impact section in LEN-38625."
}
],
"source": {
"advisory": "LEN-38625",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "da227ddf-6e25-4b41-b023-0f976dcaca4b",
"assignerShortName": "lenovo",
"cveId": "CVE-2020-8332",
"datePublished": "2020-10-14T21:25:19.000Z",
"dateReserved": "2020-01-28T00:00:00.000Z",
"dateUpdated": "2024-08-04T09:56:28.331Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8017 (GCVE-0-2020-8017)
Vulnerability from cvelistv5 – Published: 2020-04-02 14:05 – Updated: 2024-09-17 01:50
VLAI
EPSS
VEX
Title
race condition on texlive-filesystem cron job allows for the deletion of unintended files
Summary
A Race Condition Enabling Link Following vulnerability in the cron job shipped with texlive-filesystem of SUSE Linux Enterprise Module for Desktop Applications 15-SP1, SUSE Linux Enterprise Software Development Kit 12-SP4, SUSE Linux Enterprise Software Development Kit 12-SP5; openSUSE Leap 15.1 allows local users in group mktex to delete arbitrary files on the system This issue affects: SUSE Linux Enterprise Module for Desktop Applications 15-SP1 texlive-filesystem versions prior to 2017.135-9.5.1. SUSE Linux Enterprise Software Development Kit 12-SP4 texlive-filesystem versions prior to 2013.74-16.5.1. SUSE Linux Enterprise Software Development Kit 12-SP5 texlive-filesystem versions prior to 2013.74-16.5.1. openSUSE Leap 15.1 texlive-filesystem versions prior to 2017.135-lp151.8.3.1.
Severity
6.2 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1158910 |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| SUSE | SUSE Linux Enterprise Module for Desktop Applications 15-SP1 |
Affected:
texlive-filesystem , < 2017.135-9.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP4 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP5 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| openSUSE | openSUSE Leap 15.1 |
Affected:
texlive-filesystem , < 2017.135-lp151.8.3.1
(custom)
|
Date Public
2020-04-02 00:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T09:48:24.833Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "openSUSE-SU-2020:0804",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00021.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://bugzilla.suse.com/show_bug.cgi?id=1158910"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "SUSE Linux Enterprise Module for Desktop Applications 15-SP1",
"vendor": "SUSE",
"versions": [
{
"lessThan": "2017.135-9.5.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
},
{
"product": "SUSE Linux Enterprise Software Development Kit 12-SP4",
"vendor": "SUSE",
"versions": [
{
"lessThan": "2013.74-16.5.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
},
{
"product": "SUSE Linux Enterprise Software Development Kit 12-SP5",
"vendor": "SUSE",
"versions": [
{
"lessThan": "2013.74-16.5.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
},
{
"product": "openSUSE Leap 15.1",
"vendor": "openSUSE",
"versions": [
{
"lessThan": "2017.135-lp151.8.3.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Matthias Gerstner of SUSE"
}
],
"datePublic": "2020-04-02T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A Race Condition Enabling Link Following vulnerability in the cron job shipped with texlive-filesystem of SUSE Linux Enterprise Module for Desktop Applications 15-SP1, SUSE Linux Enterprise Software Development Kit 12-SP4, SUSE Linux Enterprise Software Development Kit 12-SP5; openSUSE Leap 15.1 allows local users in group mktex to delete arbitrary files on the system This issue affects: SUSE Linux Enterprise Module for Desktop Applications 15-SP1 texlive-filesystem versions prior to 2017.135-9.5.1. SUSE Linux Enterprise Software Development Kit 12-SP4 texlive-filesystem versions prior to 2013.74-16.5.1. SUSE Linux Enterprise Software Development Kit 12-SP5 texlive-filesystem versions prior to 2013.74-16.5.1. openSUSE Leap 15.1 texlive-filesystem versions prior to 2017.135-lp151.8.3.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.2,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-10-13T00:00:00.000Z",
"orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
"shortName": "suse"
},
"references": [
{
"name": "openSUSE-SU-2020:0804",
"tags": [
"vendor-advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00021.html"
},
{
"url": "https://bugzilla.suse.com/show_bug.cgi?id=1158910"
}
],
"source": {
"advisory": "https://bugzilla.suse.com/show_bug.cgi?id=1158910",
"defect": [
"1158910"
],
"discovery": "INTERNAL"
},
"title": "race condition on texlive-filesystem cron job allows for the deletion of unintended files",
"x_generator": {
"engine": "Vulnogram 0.0.9"
}
}
},
"cveMetadata": {
"assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
"assignerShortName": "suse",
"cveId": "CVE-2020-8017",
"datePublished": "2020-04-02T14:05:18.643Z",
"dateReserved": "2020-01-27T00:00:00.000Z",
"dateUpdated": "2024-09-17T01:50:50.369Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2020-8016 (GCVE-0-2020-8016)
Vulnerability from cvelistv5 – Published: 2020-04-02 14:05 – Updated: 2024-09-16 19:30
VLAI
EPSS
VEX
Title
race condition in the packaging of texlive-filesysten
Summary
A Race Condition Enabling Link Following vulnerability in the packaging of texlive-filesystem of SUSE Linux Enterprise Module for Desktop Applications 15-SP1, SUSE Linux Enterprise Software Development Kit 12-SP4, SUSE Linux Enterprise Software Development Kit 12-SP5; openSUSE Leap 15.1 allows local users to corrupt files or potentially escalate privileges. This issue affects: SUSE Linux Enterprise Module for Desktop Applications 15-SP1 texlive-filesystem versions prior to 2017.135-9.5.1. SUSE Linux Enterprise Software Development Kit 12-SP4 texlive-filesystem versions prior to 2013.74-16.5.1. SUSE Linux Enterprise Software Development Kit 12-SP5 texlive-filesystem versions prior to 2013.74-16.5.1. openSUSE Leap 15.1 texlive-filesystem versions prior to 2017.135-lp151.8.3.1.
Severity
4.9 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1159740 |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| SUSE | SUSE Linux Enterprise Module for Desktop Applications 15-SP1 |
Affected:
texlive-filesystem , < 2017.135-9.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP4 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP5 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| openSUSE | openSUSE Leap 15.1 |
Affected:
texlive-filesystem , < 2017.135-lp151.8.3.1
(custom)
|
Date Public
2020-04-01 00:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T09:48:24.747Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "openSUSE-SU-2020:0804",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00021.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://bugzilla.suse.com/show_bug.cgi?id=1159740"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "SUSE Linux Enterprise Module for Desktop Applications 15-SP1",
"vendor": "SUSE",
"versions": [
{
"lessThan": "2017.135-9.5.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
},
{
"product": "SUSE Linux Enterprise Software Development Kit 12-SP4",
"vendor": "SUSE",
"versions": [
{
"lessThan": "2013.74-16.5.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
},
{
"product": "SUSE Linux Enterprise Software Development Kit 12-SP5",
"vendor": "SUSE",
"versions": [
{
"lessThan": "2013.74-16.5.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
},
{
"product": "openSUSE Leap 15.1",
"vendor": "openSUSE",
"versions": [
{
"lessThan": "2017.135-lp151.8.3.1",
"status": "affected",
"version": "texlive-filesystem",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Matthias Gerstner of SUSE"
}
],
"datePublic": "2020-04-01T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A Race Condition Enabling Link Following vulnerability in the packaging of texlive-filesystem of SUSE Linux Enterprise Module for Desktop Applications 15-SP1, SUSE Linux Enterprise Software Development Kit 12-SP4, SUSE Linux Enterprise Software Development Kit 12-SP5; openSUSE Leap 15.1 allows local users to corrupt files or potentially escalate privileges. This issue affects: SUSE Linux Enterprise Module for Desktop Applications 15-SP1 texlive-filesystem versions prior to 2017.135-9.5.1. SUSE Linux Enterprise Software Development Kit 12-SP4 texlive-filesystem versions prior to 2013.74-16.5.1. SUSE Linux Enterprise Software Development Kit 12-SP5 texlive-filesystem versions prior to 2013.74-16.5.1. openSUSE Leap 15.1 texlive-filesystem versions prior to 2017.135-lp151.8.3.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 4.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-10-13T00:00:00.000Z",
"orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
"shortName": "suse"
},
"references": [
{
"name": "openSUSE-SU-2020:0804",
"tags": [
"vendor-advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00021.html"
},
{
"url": "https://bugzilla.suse.com/show_bug.cgi?id=1159740"
}
],
"source": {
"advisory": "https://bugzilla.suse.com/show_bug.cgi?id=1159740",
"defect": [
"1159740"
],
"discovery": "INTERNAL"
},
"title": "race condition in the packaging of texlive-filesysten",
"x_generator": {
"engine": "Vulnogram 0.0.9"
}
}
},
"cveMetadata": {
"assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
"assignerShortName": "suse",
"cveId": "CVE-2020-8016",
"datePublished": "2020-04-02T14:05:17.952Z",
"dateReserved": "2020-01-27T00:00:00.000Z",
"dateUpdated": "2024-09-16T19:30:49.212Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Mitigation
Implementation
The most basic advice for TOCTOU vulnerabilities is to not perform a check before the use. This does not resolve the underlying issue of the execution of a function on a resource whose state and identity cannot be assured, but it does help to limit the false sense of security given by the check.
Mitigation
Implementation
When the file being altered is owned by the current user and group, set the effective gid and uid to that of the current user and group when executing this statement.
Mitigation
Architecture and Design
Limit the interleaving of operations on files from multiple processes.
Mitigation
Implementation
Architecture and Design
If you cannot perform operations atomically and you must share access to the resource between multiple processes or threads, then try to limit the amount of time (CPU cycles) between the check and use of the resource. This will not fix the problem, but it could make it more difficult for an attack to succeed.
Mitigation
Implementation
Recheck the resource after the use call to verify that the action was taken appropriately.
Mitigation
Architecture and Design
Ensure that some environmental locking mechanism can be used to protect resources effectively.
Mitigation
Implementation
Ensure that locking occurs before the check, as opposed to afterwards, such that the resource, as checked, is the same as it is when in use.
CAPEC-27: Leveraging Race Conditions via Symbolic Links
This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.
CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.