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)
Core 5
Core References
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1866838
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://packetstormsecurity.com/files/158755/GS20200804145053.txt
Release Notes, Vendor Advisory x_refsource_misc
https://c-ares.haxx.se/changelog.html
Patch, Third Party Advisory x_refsource_misc
https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
Scores
CVSS v3
3.3
EPSS
0.0019
EPSS Percentile
40.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Details
CWE
CWE-416
CWE-415
CWE-120
Status
published
Products (2)
c-ares/c-ares
1.16.0
fedoraproject/fedora
33
Published
May 13, 2021
Tracked Since
Feb 18, 2026