FKIE_CVE-2016-2161
Vulnerability from fkie_nvd - Published: 2017-07-27 21:29 - Updated: 2026-06-17 00:43
Severity
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| apache | http_server | 2.4.0 | |
| apache | http_server | 2.4.1 | |
| apache | http_server | 2.4.2 | |
| apache | http_server | 2.4.3 | |
| apache | http_server | 2.4.6 | |
| apache | http_server | 2.4.7 | |
| apache | http_server | 2.4.8 | |
| apache | http_server | 2.4.9 | |
| apache | http_server | 2.4.10 | |
| apache | http_server | 2.4.12 | |
| apache | http_server | 2.4.14 | |
| apache | http_server | 2.4.16 | |
| apache | http_server | 2.4.19 | |
| apache | http_server | 2.4.20 | |
| apache | http_server | 2.4.21 | |
| apache | http_server | 2.4.22 | |
| apache | http_server | 2.4.23 |
{
"affected": [
{
"affectedData": [
{
"product": "Apache HTTP Server",
"vendor": "Apache Software Foundation",
"versions": [
{
"status": "affected",
"version": "2.4.0 to 2.4.23"
}
]
}
],
"source": "security@apache.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*",
"matchCriteriaId": "BDC40E89-2D57-4988-913E-024BFB56B367",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*",
"matchCriteriaId": "6FCD3C8C-9BF8-4F30-981A-593EEAEB9EDD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*",
"matchCriteriaId": "046487A3-752B-4D0F-8984-96486B828EAB",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*",
"matchCriteriaId": "89D2E052-51CD-4B57-A8B8-FAE51988D654",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*",
"matchCriteriaId": "8FEAB0DF-04A9-4F99-8666-0BADC5D642B8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*",
"matchCriteriaId": "E7D924D1-8A36-4C43-9E56-52814F9A6350",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.8:*:*:*:*:*:*:*",
"matchCriteriaId": "DFA089AB-AF28-4AE1-AE39-6D1B8192A3DF",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*",
"matchCriteriaId": "39CDFECC-E26D-47E0-976F-6629040B3764",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:*",
"matchCriteriaId": "E3ECBCB1-0675-41F5-857B-438F36925F63",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.12:*:*:*:*:*:*:*",
"matchCriteriaId": "CB6CBFBF-74F6-42AF-BC79-AA53EA75F00B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.14:*:*:*:*:*:*:*",
"matchCriteriaId": "69CB1C41-0360-44D0-B73A-273B0DDE46D5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.16:*:*:*:*:*:*:*",
"matchCriteriaId": "8717A96B-9DB5-48D6-A2CF-A5E2B26AF3F3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.19:*:*:*:*:*:*:*",
"matchCriteriaId": "2AE538EE-7152-4DB5-AE45-614494CB7B95",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*",
"matchCriteriaId": "B803D25B-0A19-4569-BA05-09D58F33917C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.21:*:*:*:*:*:*:*",
"matchCriteriaId": "BE253E49-9A56-49C8-B1D8-E23BB3D5D1D7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.22:*:*:*:*:*:*:*",
"matchCriteriaId": "DE5A73E5-1A04-420B-92B2-B90FD970005C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:*",
"matchCriteriaId": "8510442C-212F-4013-85FA-E0AB59F6F2C6",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "En Apache HTTP Server versiones 2.4.0 hasta 2.4.23, una entrada maliciosa a mod_auth_digest puede causar que el servidor se bloquee y cada instancia contin\u00faa bloqueado incluso para las peticiones v\u00e1lidas posteriormente."
}
],
"id": "CVE-2016-2161",
"lastModified": "2026-06-17T00:43:33.473",
"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
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2017-07-27T21:29:00.257",
"references": [
{
"source": "security@apache.org",
"url": "http://rhn.redhat.com/errata/RHSA-2017-1415.html"
},
{
"source": "security@apache.org",
"url": "http://www.debian.org/security/2017/dsa-3796"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/95076"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1037508"
},
{
"source": "security@apache.org",
"url": "https://access.redhat.com/errata/RHSA-2017:0906"
},
{
"source": "security@apache.org",
"url": "https://access.redhat.com/errata/RHSA-2017:1161"
},
{
"source": "security@apache.org",
"url": "https://access.redhat.com/errata/RHSA-2017:1413"
},
{
"source": "security@apache.org",
"url": "https://access.redhat.com/errata/RHSA-2017:1414"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbux03725en_us"
},
{
"source": "security@apache.org",
"tags": [
"Vendor Advisory"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-2161"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"url": "https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/201701-36"
},
{
"source": "security@apache.org",
"url": "https://security.netapp.com/advisory/ntap-20180423-0001/"
},
{
"source": "security@apache.org",
"url": "https://support.apple.com/HT208221"
},
{
"source": "security@apache.org",
"url": "https://www.tenable.com/security/tns-2017-04"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2017-1415.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.debian.org/security/2017/dsa-3796"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/95076"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1037508"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2017:0906"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2017:1161"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2017:1413"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2017:1414"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbux03725en_us"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-2161"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/201701-36"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://security.netapp.com/advisory/ntap-20180423-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://support.apple.com/HT208221"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.tenable.com/security/tns-2017-04"
}
],
"sourceIdentifier": "security@apache.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-823"
}
],
"source": "security@apache.org",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
Loading…
Loading…
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.
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.
Loading…