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Debian LTS Advisory DLA-3567-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                         Anton Gladky
September 15, 2023                            https://wiki.debian.org/LTS
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Package        : c-ares
Version        : 1.14.0-1+deb10u4
CVE ID         : CVE-2020-22217

A vulnerability has been identified in c-ares, an asynchronous name
resolver library:

CVE-2020-22217:

    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/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