CVE-2020-14354

Name: CVE-2020-14354
Creator: NVD / NIST
Published: 2021-05-13T14:15:17.503+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2020-14354 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. 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. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.3/10

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

EPSS Probability

0.53%

40.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
C-Ares	C-Ares	1.16.0
Fedoraproject	Fedora	33

References

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

Timeline

Published: May 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-14354?

How severe is CVE-2020-14354?

CVE-2020-14354 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14354?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-14354?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST