An asterisk security update has been released for Debian GNU/Linux 11 to address multiple security vulnerabilities.

DSA 5285-1: asterisk security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-5285-1 security@debian.org
  https://www.debian.org/security/ Markus Koschany
November 17, 2022   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : asterisk
CVE ID : CVE-2021-37706 CVE-2021-43299 CVE-2021-43300 CVE-2021-43301
CVE-2021-43302 CVE-2021-43303 CVE-2021-43804 CVE-2021-43845
CVE-2021-46837 CVE-2022-21722 CVE-2022-21723 CVE-2022-23608
CVE-2022-24763 CVE-2022-24764 CVE-2022-24786 CVE-2022-24792
CVE-2022-24793 CVE-2022-26498 CVE-2022-26499 CVE-2022-26651
Debian Bug : 1014998 1018073 1014976

Multiple security vulnerabilities have been found in Asterisk, an Open Source
Private Branch Exchange. Buffer overflows and other programming errors could be
exploited for information disclosure or the execution of arbitrary code.

Special care should be taken when upgrading to this new upstream release.
Some configuration files and options have changed in order to remedy
certain security vulnerabilities. Most notably the pjsip TLS listener only
accepts TLSv1.3 connections in the default configuration now. This can be
reverted by adding method=tlsv1_2 to the transport in pjsip.conf. See also
  https://issues.asterisk.org/jira/browse/ASTERISK-29017.

For the stable distribution (bullseye), these problems have been fixed in
version 1:16.28.0~dfsg-0+deb11u1.

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 Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/