CVE-2021-34798 (GCVE-0-2021-34798)
Vulnerability from cvelistv5 – Published: 2021-09-16 14:40 – Updated: 2024-08-04 00:26
VLAI
EPSS
VEX
Title
NULL pointer dereference in httpd core
Summary
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
Severity
No CVSS data available.
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
Apache HTTP Server 2.4 , ≤ 2.4.48
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T00:26:54.014Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"name": "FEDORA-2021-dce7e7738e",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/"
},
{
"name": "[httpd-users] 20210923 [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 Re: [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 Re: [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "FEDORA-2021-e3f6dd670d",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/"
},
{
"name": "[debian-lts-announce] 20211002 [SECURITY] [DLA 2776-1] apache2 security update",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html"
},
{
"name": "DSA-4982",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN",
"x_transferred"
],
"url": "https://www.debian.org/security/2021/dsa-4982"
},
{
"name": "20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021",
"tags": [
"vendor-advisory",
"x_refsource_CISCO",
"x_transferred"
],
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.tenable.com/security/tns-2021-17"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20211008-0004/"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10379"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf"
},
{
"name": "GLSA-202208-20",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO",
"x_transferred"
],
"url": "https://security.gentoo.org/glsa/202208-20"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Apache HTTP Server",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThanOrEqual": "2.4.48",
"status": "affected",
"version": "Apache HTTP Server 2.4",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "The issue was discovered by the Apache HTTP security team"
}
],
"descriptions": [
{
"lang": "en",
"value": "Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier."
}
],
"metrics": [
{
"other": {
"content": {
"other": "moderate"
},
"type": "unknown"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "CWE-476 NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-08-14T01:07:32.000Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "http://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"name": "FEDORA-2021-dce7e7738e",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/"
},
{
"name": "[httpd-users] 20210923 [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 Re: [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 Re: [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E"
},
{
"name": "FEDORA-2021-e3f6dd670d",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/"
},
{
"name": "[debian-lts-announce] 20211002 [SECURITY] [DLA 2776-1] apache2 security update",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html"
},
{
"name": "DSA-4982",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN"
],
"url": "https://www.debian.org/security/2021/dsa-4982"
},
{
"name": "20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021",
"tags": [
"vendor-advisory",
"x_refsource_CISCO"
],
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.tenable.com/security/tns-2021-17"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://security.netapp.com/advisory/ntap-20211008-0004/"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10379"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf"
},
{
"name": "GLSA-202208-20",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO"
],
"url": "https://security.gentoo.org/glsa/202208-20"
}
],
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2021-09-16T00:00:00.000Z",
"value": "2.4.49 released"
}
],
"title": "NULL pointer dereference in httpd core",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@apache.org",
"ID": "CVE-2021-34798",
"STATE": "PUBLIC",
"TITLE": "NULL pointer dereference in httpd core"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Apache HTTP Server",
"version": {
"version_data": [
{
"version_affected": "\u003c=",
"version_name": "Apache HTTP Server 2.4",
"version_value": "2.4.48"
}
]
}
}
]
},
"vendor_name": "Apache Software Foundation"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "The issue was discovered by the Apache HTTP security team"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": [
{
"other": "moderate"
}
],
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-476 NULL Pointer Dereference"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "http://httpd.apache.org/security/vulnerabilities_24.html",
"refsource": "MISC",
"url": "http://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"name": "FEDORA-2021-dce7e7738e",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/"
},
{
"name": "[httpd-users] 20210923 [users@httpd] 2.4.49 security fixes: more info",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697@%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 Re: [users@httpd] 2.4.49 security fixes: more info",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029@%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432@%3Cusers.httpd.apache.org%3E"
},
{
"name": "[httpd-users] 20210923 Re: [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c@%3Cusers.httpd.apache.org%3E"
},
{
"name": "FEDORA-2021-e3f6dd670d",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/"
},
{
"name": "[debian-lts-announce] 20211002 [SECURITY] [DLA 2776-1] apache2 security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html"
},
{
"name": "DSA-4982",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2021/dsa-4982"
},
{
"name": "20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021",
"refsource": "CISCO",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ"
},
{
"name": "https://www.oracle.com/security-alerts/cpujan2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"name": "https://www.tenable.com/security/tns-2021-17",
"refsource": "CONFIRM",
"url": "https://www.tenable.com/security/tns-2021-17"
},
{
"name": "https://security.netapp.com/advisory/ntap-20211008-0004/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20211008-0004/"
},
{
"name": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10379",
"refsource": "CONFIRM",
"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10379"
},
{
"name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf",
"refsource": "CONFIRM",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf"
},
{
"name": "GLSA-202208-20",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202208-20"
}
]
},
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2021-09-16T00:00:00.000Z",
"value": "2.4.49 released"
}
]
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2021-34798",
"datePublished": "2021-09-16T14:40:17.000Z",
"dateReserved": "2021-06-16T00:00:00.000Z",
"dateUpdated": "2024-08-04T00:26:54.014Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-34798",
"date": "2026-10-21",
"epss": "0.64509",
"percentile": "0.99238"
},
"microsoft_vex": {
"current_release_date": "2021-12-16T00:00:00.000Z",
"cve": "CVE-2021-34798",
"id": "msrc_CVE-2021-34798",
"initial_release_date": "2021-09-02T00:00:00.000Z",
"product_status:fixed": "2",
"product_status:known_affected": "2",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "NULL pointer dereference in httpd core",
"url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-34798.json",
"version": "2"
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1691C7CE-5CDA-4B9A-854E-3B58C1115526",
"versionEndIncluding": "2.4.48",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
"matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*",
"matchCriteriaId": "5C2089EE-5D7F-47EC-8EA5-0F69790564C4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*",
"matchCriteriaId": "1FE996B1-6951-4F85-AA58-B99A379D2163",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:*",
"matchCriteriaId": "8ADFF451-740F-4DBA-BD23-3881945D3E40",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A686FAF0-1383-4BBB-B7F5-CBCCAB55B356",
"versionEndIncluding": "5.19.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*",
"matchCriteriaId": "C2A5B24D-BDF2-423C-98EA-A40778C01A05",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:*",
"matchCriteriaId": "D26F3E23-F1A9-45E7-9E5F-0C0A24EE3783",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:enterprise_manager_base_platform:13.5.0.0:*:*:*:*:*:*:*",
"matchCriteriaId": "6E8758C8-87D3-450A-878B-86CE8C9FC140",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DFC79B17-E9D2-44D5-93ED-2F959E7A3D43",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*",
"matchCriteriaId": "AD04BEE5-E9A8-4584-A68C-0195CE9C402C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*",
"matchCriteriaId": "82EA4BA7-C38B-4AF3-8914-9E3D089EBDD4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*",
"matchCriteriaId": "B9C9BC66-FA5F-4774-9BDA-7AB88E2839C4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*",
"matchCriteriaId": "7F69B9A5-F21B-4904-9F27-95C0F7A628E3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*",
"matchCriteriaId": "D9DB4A14-2EF5-4B54-95D2-75E6CF9AA0A9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
"matchCriteriaId": "D3E503FB-6279-4D4A-91D8-E237ECF9D2B0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "B2748912-FC54-47F6-8C0C-B96784765B8E",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:siemens:ruggedcom_nms:*:*:*:*:*:*:*:*",
"matchCriteriaId": "414A7F48-EFA5-4D86-9F8D-5A179A6CFC39",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D09241FF-5652-4020-A626-D604134D5020",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "98CC9C9A-FE14-4D50-A8EC-C309229356C8",
"versionEndExcluding": "3.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:siemens:sinema_server:14.0:-:*:*:*:*:*:*",
"matchCriteriaId": "B0A5CC25-A323-4D49-8989-5A417D12D646",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier."
},
{
"lang": "es",
"value": "Unas peticiones malformadas pueden causar que el servidor haga desreferencia a un puntero NULL. Este problema afecta a Apache HTTP Server versiones 2.4.48 y anteriores"
}
],
"id": "CVE-2021-34798",
"lastModified": "2024-11-21T06:11:13.650",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-09-16T15:15:07.267",
"references": [
{
"source": "security@apache.org",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "http://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"source": "security@apache.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10379"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html"
},
{
"source": "security@apache.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/"
},
{
"source": "security@apache.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202208-20"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20211008-0004/"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4982"
},
{
"source": "security@apache.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"source": "security@apache.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.tenable.com/security/tns-2021-17"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "http://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10379"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202208-20"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20211008-0004/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4982"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.tenable.com/security/tns-2021-17"
}
],
"sourceIdentifier": "security@apache.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "security@apache.org",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-21T05:40:21+00:00",
"cve": "CVE-2021-34798",
"id": "CVE-2021-34798",
"initial_release_date": "2021-09-16T00:00:00+00:00",
"product_status:fixed": "333",
"product_status:known_affected": "13",
"product_status:known_not_affected": "12",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "httpd: NULL pointer dereference via malformed requests",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-34798.json",
"version": "3"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
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.
Loading…
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.