{ "id": "CVE-2021-44731", "sourceIdentifier": "security@ubuntu.com", "published": "2022-02-17T23:15:07.473", "lastModified": "2024-11-21T06:31:28.220", "vulnStatus": "Modified", "cveTags": [], "descriptions": [ { "lang": "en", "value": "A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitrary code and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1" }, { "lang": "es", "value": "Se presentaba una condici\u00f3n de carrera en snapd versi\u00f3n 2.54.2 en el binario snap-confine cuando era preparado un espacio de nombres de montaje privado para un snap. Esto pod\u00eda permitir a un atacante local alcanzar privilegios de root al montar su propio contenido dentro del espacio de nombres de montaje privado del snap y causar que snap-confine ejecutara c\u00f3digo arbitrario y por lo tanto obtuviera una escalada de privilegios. Corregido en snapd versiones 2.54.3+18.04, 2.54.3+20.04 y 2.54.3+21.10.1" } ], "metrics": { "cvssMetricV31": [ { "source": "security@ubuntu.com", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH" }, "exploitabilityScore": 1.1, "impactScore": 6.0 }, { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH" }, "exploitabilityScore": 1.1, "impactScore": 6.0 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "baseScore": 6.9, "accessVector": "LOCAL", "accessComplexity": "MEDIUM", "authentication": "NONE", "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "availabilityImpact": "COMPLETE" }, "baseSeverity": "MEDIUM", "exploitabilityScore": 3.4, "impactScore": 10.0, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false } ] }, "weaknesses": [ { "source": "security@ubuntu.com", "type": "Secondary", "description": [ { "lang": "en", "value": "CWE-362" } ] }, { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "CWE-362" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*", "versionEndIncluding": "2.54.2", "matchCriteriaId": "90115CE1-12C4-4504-A1A2-9C118694C398" } ] } ] }, { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D" }, { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*", "matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB" }, { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*", "matchCriteriaId": "AAE4D2D0-CEEB-416F-8BC5-A7987DF56190" } ] } ] }, { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835" }, { "vulnerable": true, "criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA" } ] } ] }, { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73" }, { "vulnerable": true, "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED" } ] } ] } ], "references": [ { "url": "http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html", "source": "security@ubuntu.com", "tags": [ "Exploit", "Third Party Advisory", "VDB Entry" ] }, { "url": "http://seclists.org/fulldisclosure/2022/Dec/4", "source": "security@ubuntu.com", "tags": [ "Exploit", "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/02/18/2", "source": "security@ubuntu.com", "tags": [ "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/02/23/1", "source": "security@ubuntu.com", "tags": [ "Exploit", "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/02/23/2", "source": "security@ubuntu.com", "tags": [ "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/11/30/2", "source": "security@ubuntu.com", "tags": [ "Exploit", "Mailing List", "Third Party Advisory" ] }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/", "source": "security@ubuntu.com" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/", "source": "security@ubuntu.com" }, { "url": "https://ubuntu.com/security/notices/USN-5292-1", "source": "security@ubuntu.com", "tags": [ "Patch", "Vendor Advisory" ] }, { "url": "https://www.debian.org/security/2022/dsa-5080", "source": "security@ubuntu.com", "tags": [ "Issue Tracking", "Third Party Advisory" ] }, { "url": "http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Exploit", "Third Party Advisory", "VDB Entry" ] }, { "url": "http://seclists.org/fulldisclosure/2022/Dec/4", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Exploit", "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/02/18/2", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/02/23/1", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Exploit", "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/02/23/2", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Mailing List", "Third Party Advisory" ] }, { "url": "http://www.openwall.com/lists/oss-security/2022/11/30/2", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Exploit", "Mailing List", "Third Party Advisory" ] }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/", "source": "af854a3a-2127-422b-91ae-364da2661108" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/", "source": "af854a3a-2127-422b-91ae-364da2661108" }, { "url": "https://ubuntu.com/security/notices/USN-5292-1", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Patch", "Vendor Advisory" ] }, { "url": "https://www.debian.org/security/2022/dsa-5080", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Issue Tracking", "Third Party Advisory" ] } ] }