Debian Security Advisory

DLA-3323-1 c-ares -- LTS security update

Date Reported:
18 Feb 2023
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 1031525.
In Mitre's CVE dictionary: CVE-2022-4904.
More information:

It was discovered that in c-ares, an asynchronous name resolver library, the config_sortlist function is missing checks about the validity of the input string, which allows a possible arbitrary length stack overflow and thus may cause a denial of service.

For Debian 10 buster, this problem has been fixed in version 1.14.0-1+deb10u2.

We recommend that you upgrade your c-ares packages.

For the detailed security status of c-ares please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: