An asterisk security update has been released for Debian GNU/Linux 10 LTS to address a buffer overflow vulnerability.

DLA 3394-1: asterisk security update

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Debian LTS Advisory DLA-3394-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Markus Koschany
April 19, 2023   https://wiki.debian.org/LTS
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Package : asterisk
Version : 1:16.28.0~dfsg-0+deb10u3
CVE ID : CVE-2023-27585

A flaw was found in Asterisk, an Open Source Private Branch Exchange. A
buffer overflow vulnerability affects users that use PJSIP DNS resolver.
This vulnerability is related to CVE-2022-24793. The difference is that
this issue is in parsing the query record `parse_query()`, while the issue
in CVE-2022-24793 is in `parse_rr()`. A workaround is to disable DNS
resolution in PJSIP config (by setting `nameserver_count` to zero) or use
an external resolver implementation instead.

For Debian 10 buster, this problem has been fixed in version
1:16.28.0~dfsg-0+deb10u3.

We recommend that you upgrade your asterisk packages.

For the detailed security status of asterisk please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/asterisk

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