{"dataType": "CVE_RECORD", "dataVersion": "5.0", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-33640", "assignerOrgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2", "assignerShortName": "openEuler", "dateUpdated": "2022-12-28T00:00:00", "dateReserved": "2021-05-28T00:00:00", "datePublished": "2022-12-19T00:00:00"}, "containers": {"cna": {"providerMetadata": {"orgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2", "shortName": "openEuler", "dateUpdated": "2022-12-28T00:00:00"}, "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)."}], "affected": [{"vendor": "openEuler", "product": "openEuler 22.03 LTS", "versions": [{"version": " libtar 1.2.20-21", "status": "affected"}]}, {"vendor": "openEuler", "product": "openEuler 20.03 LTS SP1", "versions": [{"version": " libtar 1.2.20-19", "status": "affected"}]}, {"vendor": "openEuler", "product": "openEuler 20.03 LTS SP3", "versions": [{"version": " libtar 1.2.20-19", "status": "affected"}]}], "references": [{"url": "https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640&packageName=libtar"}, {"name": "FEDORA-2022-88772d0a2d", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/"}, {"name": "FEDORA-2022-ccc68b06cc", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 6.2, "baseSeverity": "MEDIUM"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-416 Use After Free", "cweId": "CWE-416"}]}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "source": {"discovery": "UNKNOWN"}}}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:huawei:openeuler:20.03:sp1:*:*:lts:*:*:*", "matchCriteriaId": "78AA9487-C85C-4F4F-9429-E0496080F7B5", "vulnerable": true}, {"criteria": "cpe:2.3:o:huawei:openeuler:20.03:sp2:*:*:lts:*:*:*", "matchCriteriaId": "1FC8D25C-3DB2-4FA8-AECE-EE0B961B4CF2", "vulnerable": true}, {"criteria": "cpe:2.3:o:huawei:openeuler:22.03:*:*:*:lts:*:*:*", "matchCriteriaId": "435FECB5-9313-4400-A95F-8F7C9D5A0A07", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*", "matchCriteriaId": "5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*", "matchCriteriaId": "E30D0E6F-4AE8-4284-8716-991DFA48CC5D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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)."}], "id": "CVE-2021-33640", "lastModified": "2023-11-07T03:35:53.527", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 3.6, "source": "securities@openeuler.org", "type": "Secondary"}]}, "published": "2022-12-19T16:15:10.840", "references": [{"source": "securities@openeuler.org", "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", "tags": ["Vendor Advisory"], "url": "https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640&packageName=libtar"}], "sourceIdentifier": "securities@openeuler.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "securities@openeuler.org", "type": "Secondary"}]}

{}