USN-6164-2: c-ares vulnerabilities
11 September 2023
Several security issues were fixed in c-ares.
- c-ares - library for asynchronous name resolution
USN-6164-1 fixed several vulnerabilities in c-ares. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Original advisory 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.
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)
The problem can be corrected by updating your system to the following package versions:
In general, a standard system update will make all the necessary changes.
- USN-6164-1: c-ares, libc-ares2, libc-ares-dev