A vulnerability has been identified in c-ares, an asynchronous name resolver library:
A buffer overflow vulnerability has been found in c-ares before via the function ares_parse_soa_reply in ares_parse_soa_reply.c. This vulnerability was discovered through fuzzing. Exploitation of this vulnerability may allow an attacker to execute arbitrary code or cause a denial of service condition.
For Debian 10 buster, this problem has been fixed in version 1.14.0-1+deb10u4.
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/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