Vulnerability CVE-2020-14354
Published: 2021-05-13

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.

See advisories in our WLB2 database:
Topic
Author
Date
High
c-ares 1.16.0 Use-After-Free
Jann Horn
06.08.2020

Type:

CWE-416

 (Use After Free)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Fedoraproject -> Fedora 
C-ares project -> C-ares 

 References:
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
https://bugzilla.redhat.com/show_bug.cgi?id=1866838
https://c-ares.haxx.se/changelog.html
https://packetstormsecurity.com/files/158755/GS20200804145053.txt
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