High
Security advisory
In Apache HTTP Server versions 2.4.0 to 2.4.23, malicious input to mod_auth_digest can cause the server to crash, and each instance continues to crash even for subsequently valid requests.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-2161
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:50 UTC · Revision 1
Source evidence
In Apache HTTP Server versions 2.4.0 to 2.4.23, malicious input to mod_auth_digest can cause the server to crash, and each instance continues to crash even for subsequently valid requests.
osv:CVE-2016-2161
Complete source record
{
"id": "1ee4b7a51969233dad26581dc4a1e923049b12302d19ab83035e1ccce3f06f85",
"url": "https://osv.dev/vulnerability/CVE-2016-2161",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-2161",
"summary": "In Apache HTTP Server versions 2.4.0 to 2.4.23, malicious input to mod_auth_digest can cause the server to crash, and each instance continues to crash even for subsequently valid requests.",
"evidence": "osv:CVE-2016-2161",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2016-2161",
"aliases": [
"CVE-2016-2161"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/httpd",
"type": "GIT",
"events": [
{
"introduced": "da5873e80d6eee7a0838793bf68f1d0254745fbb"
},
{
"last_affected": "ef07cb031c6f8f7ac483c26fc858aad68c365fd9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.0"
},
{
"last_affected": "2.4.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.1"
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{
"last_affected": "2.4.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.2"
},
{
"last_affected": "2.4.2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.3"
},
{
"last_affected": "2.4.3"
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],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.6"
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{
"last_affected": "2.4.6"
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],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.7"
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{
"last_affected": "2.4.7"
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],
"source": "CPE_STRING"
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{
"cpe": "cpe:2.3:a:apache:http_server:2.4.8:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.8"
},
{
"last_affected": "2.4.8"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.9"
},
{
"last_affected": "2.4.9"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.10"
},
{
"last_affected": "2.4.10"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.12:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.12"
},
{
"last_affected": "2.4.12"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.14:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.14"
},
{
"last_affected": "2.4.14"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.16:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.16"
},
{
"last_affected": "2.4.16"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.19:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.19"
},
{
"last_affected": "2.4.19"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.20"
},
{
"last_affected": "2.4.20"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.21:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.21"
},
{
"last_affected": "2.4.21"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.22:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.22"
},
{
"last_affected": "2.4.22"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.23"
},
{
"last_affected": "2.4.23"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"2.4.0",
"2.4.1",
"2.4.10",
"2.4.12",
"2.4.14",
"2.4.16",
"2.4.19",
"2.4.2",
"2.4.20",
"2.4.21",
"2.4.22",
"2.4.23",
"2.4.3",
"2.4.6",
"2.4.7",
"2.4.8",
"2.4.9"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-2161.json"
}
}
],
"modified": "2026-10-24T10:30:59.218832315Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E",
"https://support.apple.com/HT208221",
"https://www.tenable.com/security/tns-2017-04",
"https://access.redhat.com/errata/RHSA-2017:0906",
"https://access.redhat.com/errata/RHSA-2017:1161",
"https://access.redhat.com/errata/RHSA-2017:1413",
"https://access.redhat.com/errata/RHSA-2017:1414",
"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03725en_us",
"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-2161",
"https://security.gentoo.org/glsa/201701-36",
"https://security.netapp.com/advisory/ntap-20180423-0001/"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2016-2161",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 439263,
"published_at": "2017-07-27T21:29:00.257+00:00"
}