SB2021051322 - Denial of service in c-ares
Published: May 13, 2021 Updated: September 30, 2021
Security Bulletin ID
SB2021051322
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2020-14354)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error and double-free in c-ares, if the ares_destroy() function is called prior to the ares_getaddrinfo() completing. A remote attacker can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
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