CVE-2021-3864

{"id": "CVE-2021-3864", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.0, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.0}]}, "published": "2022-08-26T16:15:09.680", "references": [{"url": "https://access.redhat.com/security/cve/CVE-2021-3864", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2015046", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://lore.kernel.org/all/20211221021744.864115-1-longman%40redhat.com/", "source": "secalert@redhat.com"}, {"url": "https://lore.kernel.org/all/20211226150310.GA992%401wt.eu/", "source": "secalert@redhat.com"}, {"url": "https://lore.kernel.org/lkml/20211228170910.623156-1-wander%40redhat.com/", "source": "secalert@redhat.com"}, {"url": "https://security-tracker.debian.org/tracker/CVE-2021-3864", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://www.openwall.com/lists/oss-security/2021/10/20/2", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2021-3864", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2015046", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lore.kernel.org/all/20211221021744.864115-1-longman%40redhat.com/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lore.kernel.org/all/20211226150310.GA992%401wt.eu/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lore.kernel.org/lkml/20211228170910.623156-1-wander%40redhat.com/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security-tracker.debian.org/tracker/CVE-2021-3864", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.openwall.com/lists/oss-security/2021/10/20/2", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-284"}]}, {"type": "Secondary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants. The prerequisite is a SUID binary that sets real UID equal to effective UID, and real GID equal to effective GID. The descendant will then have a dumpable value set to 1. As a result, if the descendant process crashes and core_pattern is set to a relative value, its core dump is stored in the current directory with uid:gid permissions. An unprivileged local user with eligible root SUID binary could use this flaw to place core dumps into root-owned directories, potentially resulting in escalation of privileges."}, {"lang": "es", "value": "Se ha encontrado un fallo en la forma en que es manejada la configuraci\u00f3n del flag volcable cuando determinados binarios SUID ejecutan sus descendientes. El prerrequisito es un binario SUID que establece el UID real igual al UID efectivo, y el GID real igual al GID efectivo. El descendiente tendr\u00e1 entonces un valor descargable establecido en 1. Como resultado, si el proceso descendiente es bloqueado y core_pattern es establecido en un valor relativo, su volcado de n\u00facleo es almacenado en el directorio actual con permisos uid:gid. Un usuario local no privilegiado con el binario SUID de root podr\u00eda usar este fallo para colocar los volcados de n\u00facleo en directorios propiedad de root, lo que podr\u00eda resultar en una escalada de privilegios."}], "lastModified": "2024-11-21T06:22:41.197", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}, {"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}