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FKIE_CVE-2019-11191

Vulnerability from fkie_nvd - Published: 2019-04-12 00:29 - Updated: 2026-06-17 02:12
Severity
2.5 (Low) - CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported
References
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2019/04/18/5Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2019/05/22/7
cve@mitre.orghttp://www.securityfocus.com/bid/107887Third Party Advisory, VDB Entry
cve@mitre.orghttps://usn.ubuntu.com/4006-1/
cve@mitre.orghttps://usn.ubuntu.com/4006-2/
cve@mitre.orghttps://usn.ubuntu.com/4007-1/
cve@mitre.orghttps://usn.ubuntu.com/4007-2/
cve@mitre.orghttps://usn.ubuntu.com/4008-1/
cve@mitre.orghttps://usn.ubuntu.com/4008-3/
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2019/04/03/4Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2019/04/03/4/1Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2019/04/18/5Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2019/05/22/7
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/107887Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4006-1/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4006-2/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4007-1/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4007-2/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4008-1/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4008-3/
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2019/04/03/4Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2019/04/03/4/1Exploit, Mailing List, 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": "3B7E7650-82C7-44BB-8433-AD8E9881249E",
              "versionEndIncluding": "5.0.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "disputed"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported"
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** En el kernel de Linux hasta de la versi\u00f3n 5.0.7, cuando CONFIG_IA32_AOUT est\u00e1 habilitado y ia32_aout est\u00e1 cargado, permite a los usuarios locales omitir ASLR en programas setuid a.out (si existe) porque install_exec_creds() es llamado demasiado tarde en load_aout_binary() en fs/binfmt_aout .c, y por lo tanto la comprobaci\u00f3n ptrace_may_access() tiene una condici\u00f3n de carrera cuando se lee /proc/pid/stat. NOTA: el mantenedor de software discute que se trate de una vulnerabilidad porque ASLR para un archivo ejecutable de formato nunca fue compatible."
    }
  ],
  "id": "CVE-2019-11191",
  "lastModified": "2026-06-17T02:12:30.543",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 1.9,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:M/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.4,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 2.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
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  },
  "published": "2019-04-12T00:29:00.310",
  "references": [
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html"
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      "tags": [
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      "url": "http://www.securityfocus.com/bid/107887"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://usn.ubuntu.com/4006-1/"
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    {
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    {
      "source": "cve@mitre.org",
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      "source": "cve@mitre.org",
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      "source": "cve@mitre.org",
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
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          "lang": "en",
          "value": "CWE-362"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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