fkie_cve-2021-41773
Vulnerability from fkie_nvd
Published
2021-10-05 09:15
Modified
2025-03-21 21:07
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| apache | http_server | 2.4.49 | |
| fedoraproject | fedora | 34 | |
| fedoraproject | fedora | 35 | |
| oracle | instantis_enterprisetrack | 17.1 | |
| oracle | instantis_enterprisetrack | 17.2 | |
| oracle | instantis_enterprisetrack | 17.3 | |
| netapp | cloud_backup | - |
{ cisaActionDue: "2021-11-17", cisaExploitAdd: "2021-11-03", cisaRequiredAction: "Apply updates per vendor instructions.", cisaVulnerabilityName: "Apache HTTP Server Path Traversal Vulnerability", configurations: [ { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:*", matchCriteriaId: "B201CFB2-F626-4DD0-9F6A-DFE8F64203E2", 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: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, }, ], negate: false, operator: "OR", }, ], }, { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*", matchCriteriaId: "5C2089EE-5D7F-47EC-8EA5-0F69790564C4", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, ], cveTags: [], descriptions: [ { lang: "en", value: "A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration \"require all denied\", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.", }, { lang: "es", value: "Se ha encontrado un fallo en un cambio realizado en la normalización de rutas en Apache HTTP Server 2.4.49. Un atacante podría utilizar un ataque de recorrido para asignar URLs a archivos fuera de los directorios configurados por las directivas tipo Alias. Si los archivos fuera de estos directorios no están protegidos por la configuración habitual por defecto \"require all denied\", estas peticiones pueden tener éxito. Si los scripts CGI también están habilitados para estas rutas alias, esto podría permitir la ejecución remota de código. Se sabe que este problema ha sido explotado en la naturaleza. Este problema sólo afecta a Apache 2.4.49 y no a versiones anteriores. La corrección en Apache HTTP Server 2.4.50 es incompleta, véase CVE-2021-42013", }, ], id: "CVE-2021-41773", lastModified: "2025-03-21T21:07:31.030", metrics: { cvssMetricV2: [ { acInsufInfo: false, baseSeverity: "MEDIUM", cvssData: { accessComplexity: "MEDIUM", accessVector: "NETWORK", authentication: "NONE", availabilityImpact: "NONE", baseScore: 4.3, confidentialityImpact: "PARTIAL", integrityImpact: "NONE", vectorString: "AV:N/AC:M/Au:N/C:P/I:N/A:N", version: "2.0", }, exploitabilityScore: 8.6, impactScore: 2.9, obtainAllPrivilege: false, obtainOtherPrivilege: false, obtainUserPrivilege: false, source: "nvd@nist.gov", type: "Primary", userInteractionRequired: false, }, ], cvssMetricV31: [ { cvssData: { attackComplexity: "LOW", attackVector: "NETWORK", availabilityImpact: "NONE", baseScore: 7.5, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "NONE", privilegesRequired: "NONE", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", version: "3.1", }, exploitabilityScore: 3.9, impactScore: 3.6, source: "nvd@nist.gov", type: "Primary", }, { cvssData: { attackComplexity: "LOW", attackVector: "NETWORK", availabilityImpact: "NONE", baseScore: 7.5, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "NONE", privilegesRequired: "NONE", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", version: "3.1", }, exploitabilityScore: 3.9, impactScore: 3.6, source: "134c704f-9b21-4f2e-91b3-4a467353bcc0", type: "Secondary", }, ], }, published: "2021-10-05T09:15:07.593", references: [ { source: "security@apache.org", tags: [ "Exploit", "Third Party Advisory", "VDB Entry", ], url: "http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html", }, { source: "security@apache.org", tags: [ "Exploit", "Third Party Advisory", "VDB Entry", ], url: 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"Vendor Advisory", ], url: "https://httpd.apache.org/security/vulnerabilities_24.html", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", "Patch", ], url: "https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org%3E", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", ], url: "https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f%40%3Cusers.httpd.apache.org%3E", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", ], url: "https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%3E", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", ], url: "https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45%40%3Cannounce.apache.org%3E", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", ], url: "https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb%40%3Cusers.httpd.apache.org%3E", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Release Notes", ], url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Release Notes", ], url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/", }, { 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-20211029-0009/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Third Party Advisory", ], url: "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Patch", "Third Party Advisory", ], url: "https://www.oracle.com/security-alerts/cpujan2022.html", }, ], sourceIdentifier: "security@apache.org", vulnStatus: "Analyzed", weaknesses: [ { description: [ { lang: "en", value: "CWE-22", }, ], source: "security@apache.org", type: "Secondary", }, { description: [ { lang: "en", value: "CWE-22", }, ], source: "nvd@nist.gov", type: "Primary", }, ], }
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.