CVE-2020-14354

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.

• CWE-120
• CWE-415
• CWE-416

• https://bugzilla.redhat.com/show_bug.cgi?id=1866838Exploit, Issue Tracking, Patch, Third Party Advisory
• https://c-ares.haxx.se/changelog.htmlRelease Notes, Vendor Advisory
• https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170ePatch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
• https://packetstormsecurity.com/files/158755/GS20200804145053.txtExploit, Third Party Advisory, VDB Entry
• https://bugzilla.redhat.com/show_bug.cgi?id=1866838Exploit, Issue Tracking, Patch, Third Party Advisory
• https://c-ares.haxx.se/changelog.htmlRelease Notes, Vendor Advisory
• https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170ePatch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
• https://packetstormsecurity.com/files/158755/GS20200804145053.txtExploit, Third Party Advisory, VDB Entry

Published

May 13, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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