CVE-2021-33640

{"id": "CVE-2021-33640", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "securities@openeuler.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.2, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.5}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2022-12-19T16:15:10.840", "references": [{"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/", "source": "securities@openeuler.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/", "source": "securities@openeuler.org"}, {"url": "https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640&packageName=libtar", "tags": ["Vendor Advisory"], "source": "securities@openeuler.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640&packageName=libtar", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "securities@openeuler.org", "description": [{"lang": "en", "value": "CWE-416"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t->th_buf) . As a result, the released memory is used (use-after-free)."}, {"lang": "es", "value": "Despu\u00e9s de tar_close(), libtar.c libera la memoria a la que apunta el puntero t. Despu\u00e9s de llamar a tar_close() en la funci\u00f3n list(), contin\u00faa usando el puntero t: free_longlink_longname(t->th_buf). Como resultado, la memoria liberada se utiliza (use after free)."}], "lastModified": "2025-04-02T18:33:53.340", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:openatom:openeuler:20.03:sp1:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "464D2E5A-0D36-4893-85A4-2267AE0333DE"}, {"criteria": "cpe:2.3:o:openatom:openeuler:20.03:sp2:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "EC27F5E3-893E-4A96-91C3-4B716457172C"}, {"criteria": "cpe:2.3:o:openatom:openeuler:22.03:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "5975B9D2-6A0F-43DE-806E-C8FC6D152EF6"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD"}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E30D0E6F-4AE8-4284-8716-991DFA48CC5D"}], "operator": "OR"}]}], "sourceIdentifier": "securities@openeuler.org"}