{"id":"CVE-2020-14354","details":"A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ares_getaddrinfo() completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability.","modified":"2026-07-08T20:30:28.468466Z","published":"2021-05-13T14:15:17.503Z","database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"33"},{"last_affected":"33"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/"},{"type":"ADVISORY","url":"https://c-ares.haxx.se/changelog.html"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1866838"},{"type":"FIX","url":"https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e"},{"type":"EVIDENCE","url":"https://packetstormsecurity.com/files/158755/GS20200804145053.txt"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/c-ares/c-ares","events":[{"introduced":"077a587dccbe2f0d8a1987fbd3525333705c2249"},{"last_affected":"077a587dccbe2f0d8a1987fbd3525333705c2249"},{"fixed":"1cc7e83c3bdfaafbc5919c95025592d8de3a170e"}],"database_specific":{"source":["CPE_STRING","REFERENCES"],"cpe":"cpe:2.3:a:c-ares:c-ares:1.16.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.16.0"},{"last_affected":"1.16.0"}]}}],"versions":["1.16.0","cares-1_16_0"],"database_specific":{"vanir_signatures":[{"target":{"file":"ares_getaddrinfo.c","function":"host_callback"},"deprecated":false,"digest":{"function_hash":"41641729463172895225490036612231902270","length":625},"id":"CVE-2020-14354-0943984d","signature_type":"Function","signature_version":"v1","source":"https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e"},{"source":"https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e","target":{"file":"ares_getaddrinfo.c"},"deprecated":false,"digest":{"line_hashes":["188514934666865950876588083814903200380","216654447602516332471211556636820849519","280935007277571070082878613853237796717","123115424187489169459219809240179726727"],"threshold":0.9},"id":"CVE-2020-14354-61d1432b","signature_type":"Line","signature_version":"v1"}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14354.json","vanir_signatures_modified":"2026-07-08T20:30:28Z"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}