What’s Vulnerable › Vulnerabilities

CVE-2020-14354

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-13 · updated 2026-06-17
• Weakness: CWE-120

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.

Affected products

• c-ares: 1.16.0
• Fedoraproject Fedora: 33

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1866838
• https://c-ares.haxx.se/changelog.html
• https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
• https://packetstormsecurity.com/files/158755/GS20200804145053.txt
• https://bugzilla.redhat.com/show_bug.cgi?id=1866838
• https://c-ares.haxx.se/changelog.html
• https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
• https://packetstormsecurity.com/files/158755/GS20200804145053.txt

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