[USN-6164-2] c-ares vulnerabilities
Leonidas S. Barbosa
leo.barbosa at canonical.com
Mon Sep 11 17:27:45 UTC 2023
Ubuntu Security Notice USN-6164-2
September 11, 2023
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
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
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
In general, a standard system update will make all the necessary changes.
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