fkie_cve-2016-2856
Vulnerability from fkie_nvd
Published
2016-03-14 01:59
Modified
2025-04-12 10:46
Summary
pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk. NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option.
References
cve@mitre.orghttp://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403
cve@mitre.orghttp://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958
cve@mitre.orghttp://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html
cve@mitre.orghttp://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2016/02/23/3
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2016/03/07/2
cve@mitre.orghttp://www.securityfocus.com/bid/84601
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2985-1
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2985-2
af854a3a-2127-422b-91ae-364da2661108http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403
af854a3a-2127-422b-91ae-364da2661108http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958
af854a3a-2127-422b-91ae-364da2661108http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html
af854a3a-2127-422b-91ae-364da2661108http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2016/02/23/3
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2016/03/07/2
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/84601
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2985-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2985-2
Impacted products



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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk.  NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option."
    },
    {
      "lang": "es",
      "value": "pt_chown en el paquete glibc en versiones anteriores a 2.19-18+deb8u4 en Debian jessie; el paquete elibc en versiones anteriores a 2.15-0ubuntu10.14 en Ubuntu 12.04 LTS y en versiones anteriores a 2.19-0ubuntu6.8 en Ubuntu 14.04 LTS; y el paquete glibc en versiones anteriores a 2.21-0ubuntu4.2 en Ubuntu 15.10 y en versiones anteriores a 2.23-0ubuntu1 en Ubuntu 16.04 LTS y 16.10 carece de verificaci\u00f3n de paso de espacio de nombres asociado a la ejecuci\u00f3n del descriptor de archivo, lo que permite a usuarios locales capturar pulsaciones del teclado y suplantar datos, y posiblemente obtener privilegios, a trav\u00e9s de operaciones pts de lectura y escritura, relacionado con debian/sysdeps/linux.mk. NOTA: no est\u00e1 considerada una vulnerabilidad inicial en la GNU C Library porque la documentaci\u00f3n de distribuci\u00f3n tiene una clara recomendaci\u00f3n de seguridad frente a la opci\u00f3n --enable-pt_chown."
    }
  ],
  "id": "CVE-2016-2856",
  "lastModified": "2025-04-12T10:46:40.837",
  "metrics": {
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          "authentication": "NONE",
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          "version": "2.0"
        },
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        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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  "published": "2016-03-14T01:59:04.950",
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-264"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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