Debian LTS: DLA-3323-1: c-ares security update
Summary
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:
https://security-tracker.debian.org/tracker/source-package/c-ares
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS