USN-6164-1: c-ares vulnerabilities

Releases

• Ubuntu 23.04
• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages

• c-ares - library for asynchronous name resolution

Details

Hannes Moesl discovered that c-ares incorrectly handled certain ipv6
addresses. An attacker could use this issue to cause c-ares to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2023-31130)

Xiang Li discovered that c-ares incorrectly handled certain UDP packets. A
remote attacker could possibly use this issue to cause c-res to crash,
resulting in a denial of service. (CVE-2023-32067)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 23.04

• libc-ares2 - 1.18.1-2ubuntu0.1

Ubuntu 22.10

• libc-ares2 - 1.18.1-1ubuntu0.22.10.2

Ubuntu 22.04

• libc-ares2 - 1.18.1-1ubuntu0.22.04.2

Ubuntu 20.04

• libc-ares2 - 1.15.0-1ubuntu0.3

In general, a standard system update will make all the necessary changes.

References

• CVE-2023-31130
• CVE-2023-32067

Related notices

• USN-6164-2: libc-ares-dev, c-ares, libc-ares2