GSD-2018-16841
Vulnerability from gsd - Updated: 2023-12-13 01:22Details
Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2018-16841",
"description": "Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba\u0027s KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.",
"id": "GSD-2018-16841",
"references": [
"https://www.suse.com/security/cve/CVE-2018-16841.html",
"https://www.debian.org/security/2018/dsa-4345",
"https://ubuntu.com/security/CVE-2018-16841",
"https://advisories.mageia.org/CVE-2018-16841.html",
"https://security.archlinux.org/CVE-2018-16841"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2018-16841"
],
"details": "Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba\u0027s KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.",
"id": "GSD-2018-16841",
"modified": "2023-12-13T01:22:26.283002Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2018-16841",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "samba",
"version": {
"version_data": [
{
"version_value": "4.7.12"
},
{
"version_value": "4.8.7"
},
{
"version_value": "4.9.3"
}
]
}
}
]
},
"vendor_name": "[UNKNOWN]"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba\u0027s KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process."
}
]
},
"impact": {
"cvss": [
[
{
"vectorString": "5.7/CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
"version": "3.0"
}
]
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-416"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "106023",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/106023"
},
{
"name": "USN-3827-2",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/3827-2/"
},
{
"name": "USN-3827-1",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/3827-1/"
},
{
"name": "https://security.netapp.com/advisory/ntap-20181127-0001/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20181127-0001/"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841",
"refsource": "CONFIRM",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841"
},
{
"name": "DSA-4345",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2018/dsa-4345"
},
{
"name": "https://www.samba.org/samba/security/CVE-2018-16841.html",
"refsource": "CONFIRM",
"url": "https://www.samba.org/samba/security/CVE-2018-16841.html"
},
{
"name": "GLSA-202003-52",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202003-52"
}
]
}
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "4.7.12",
"versionStartIncluding": "4.3.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "4.8.7",
"versionStartIncluding": "4.8.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "4.9.3",
"versionStartIncluding": "4.9.0",
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"cpe_name": [],
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},
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe_name": [],
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},
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
}
]
},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2018-16841"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "en",
"value": "Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba\u0027s KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "CWE-415"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.samba.org/samba/security/CVE-2018-16841.html",
"refsource": "CONFIRM",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://www.samba.org/samba/security/CVE-2018-16841.html"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841",
"refsource": "CONFIRM",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841"
},
{
"name": "DSA-4345",
"refsource": "DEBIAN",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2018/dsa-4345"
},
{
"name": "USN-3827-2",
"refsource": "UBUNTU",
"tags": [
"Third Party Advisory"
],
"url": "https://usn.ubuntu.com/3827-2/"
},
{
"name": "USN-3827-1",
"refsource": "UBUNTU",
"tags": [
"Third Party Advisory"
],
"url": "https://usn.ubuntu.com/3827-1/"
},
{
"name": "https://security.netapp.com/advisory/ntap-20181127-0001/",
"refsource": "CONFIRM",
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"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20181127-0001/"
},
{
"name": "106023",
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{
"name": "GLSA-202003-52",
"refsource": "GENTOO",
"tags": [
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],
"url": "https://security.gentoo.org/glsa/202003-52"
}
]
}
},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 8.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6
}
},
"lastModifiedDate": "2022-08-29T20:04Z",
"publishedDate": "2018-11-28T14:29Z"
}
}
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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