Debian: DLA-3471-1 Critical: c-ares Denial of Service and Buffer Issues

CVE-2023-31130

ares_inet_net_pton() is found to be vulnerable to a buffer underflow
for certain ipv6 addresses, in particular "0::00:00:00/2" was found
to cause an issue. c-ares only uses this function internally for
configuration purposes, however external usage for other purposes may
cause more severe issues.

CVE-2023-32067

Target resolver may erroneously interprets a malformed UDP packet
with a length of 0 as a graceful shutdown of the connection, which
could cause a denial of service.

For Debian 10 buster, these problems have been fixed in version
1.14.0-1+deb10u3.

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