Low severity · published May 13, 2021
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
3.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
C-ares · C-ares
1.16.0 · source: NVD
FE
Fedora · Fedoraproject
33 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-14354
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-14354
Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=1866838
Release Notes
https://c-ares.haxx.se/changelog.html
Patch
https://github.com/c-ares/c-ares/commit/1cc7e83c3bdfaafbc5919c95025592d8de3a170e
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
Exploit
https://packetstormsecurity.com/files/158755/GS20200804145053.txt
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