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.

Affected

c-ares

CVSS v3.1 NVD

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

CVSS v2.0 NVD

2.1 LOWAV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.53% chance of exploitation in the next 30 days, 44th percentile

Published

2021-05-13

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://packetstormsecurity.com/files/158755/GS20200804145053.txt

Security advisories

• https://c-ares.haxx.se/changelog.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1866838
• c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e

References

• CVE Record
• NVD entry