CVE-2020-14354

LOW

C-ares - Use After Free

Title source: rule

Description

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.

References (5)

[Exploit, Issue Tracking, Patch, Third Party Advisory] https://bugzilla.redhat.com/show_bug.cgi?id=1866838

[Release Notes, Vendor Advisory] https://c-ares.haxx.se/changelog.html

[Patch, Third Party Advisory] https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e

View Patch ZIP pw:eip

[Exploit, Third Party Advisory, VDB Entry] https://packetstormsecurity.com/files/158755/GS20200804145053.txt

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/

Scores

CVSS v3 3.3

EPSS 0.0019

EPSS Percentile 40.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Classification

CWE

CWE-416 CWE-415 CWE-120

Status published

Affected Products (2)

c-ares/c-ares

fedoraproject/fedora

Timeline

Published May 13, 2021

Tracked Since Feb 18, 2026