==========================================================================
Ubuntu Security Notice USN-6676-1
March 06, 2024
c-ares vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
Summary:
c-ares could be made to crash if it received specially crafted
input.
Software Description:
- c-ares: library for asynchronous name resolution
Details:
Vojtěch Vobr discovered that c-ares incorrectly handled user input from
local configuration files. An attacker could possibly use this issue to
cause a denial of service via application crash.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 23.10:
   libc-ares2                      1.19.1-3ubuntu0.1
Ubuntu 22.04 LTS:
   libc-ares2                      1.18.1-1ubuntu0.22.04.3
Ubuntu 20.04 LTS:
   libc-ares2                      1.15.0-1ubuntu0.5
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libc-ares2                      1.14.0-1ubuntu0.2+esm2
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libc-ares2                      1.10.0-3ubuntu0.2+esm3
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6676-1
   CVE-2024-25629
Package Information:
   https://launchpad.net/ubuntu/+source/c-ares/1.19.1-3ubuntu0.1
   https://launchpad.net/ubuntu/+source/c-ares/1.18.1-1ubuntu0.22.04.3
   https://launchpad.net/ubuntu/+source/c-ares/1.15.0-1ubuntu0.5