FKIE_CVE-2017-5551

Vulnerability from fkie_nvd - Published: 2017-02-06 06:59 - Updated: 2026-06-17 01:20
Severity
4.4 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Summary
The simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-7097.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=497de07d89c1410d76a15bec2bb41f24a2a89f31Issue Tracking, Patch, Third Party Advisory
cve@mitre.orghttp://www.debian.org/security/2017/dsa-3791
cve@mitre.orghttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6Release Notes, Vendor Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2017/01/21/3Mailing List, Patch, Third Party Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/95717Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1038053
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1416126Issue Tracking, Patch
cve@mitre.orghttps://github.com/torvalds/linux/commit/497de07d89c1410d76a15bec2bb41f24a2a89f31Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=497de07d89c1410d76a15bec2bb41f24a2a89f31Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2017/dsa-3791
af854a3a-2127-422b-91ae-364da2661108http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2017/01/21/3Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/95717Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1038053
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1416126Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/497de07d89c1410d76a15bec2bb41f24a2a89f31Issue Tracking, Patch, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "56274F09-9AD1-471A-8663-69116F7C8615",
              "versionEndIncluding": "4.9.5",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-7097."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n simple_set_acl en fs/posix_acl.c en el kernel de Linux en versiones anteriores a 4.9.6 preserva el bit setgid durante una llamada setxattr que implica un sistema de archivos tmpfs, lo que permite a usuarios locales obtener privilegios de grupo aprovechando la existencia de un programa setgid con restricciones sobre los permisos de ejecuci\u00f3n. NOTA: esta vulnerabilidad existe debido a una soluci\u00f3n incompleta para CVE-2016-7097."
    }
  ],
  "id": "CVE-2017-5551",
  "lastModified": "2026-06-17T01:20:44.037",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 3.6,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.0"
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        "impactScore": 2.5,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2017-02-06T06:59:00.717",
  "references": [
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      "tags": [
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    {
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    },
    {
      "source": "cve@mitre.org",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
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    },
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    }
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Sightings

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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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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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