CVE-2016-2856

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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": "2026-06-17T00:44:36.117", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-03-14T01:59:04.950", "references": [{"source": "cve@mitre.org", "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403"}, {"source": "cve@mitre.org", "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958"}, {"source": "cve@mitre.org", "url": "http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html"}, {"source": "cve@mitre.org", "url": "http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2016/02/23/3"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2016/03/07/2"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/84601"}, {"source": "cve@mitre.org", "url": "http://www.ubuntu.com/usn/USN-2985-1"}, {"source": "cve@mitre.org", "url": "http://www.ubuntu.com/usn/USN-2985-2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2016/02/23/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2016/03/07/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/84601"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.ubuntu.com/usn/USN-2985-1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.ubuntu.com/usn/USN-2985-2"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-264"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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