Debian Security Advisory

DLA-2729-1 asterisk -- LTS security update

Date Reported:
04 Aug 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-32558.
More information:

It was discovered that there was an issue in the Asterisk telephony system. If the IAX2 channel driver received a packet that contained an unsupported media format, a crash could have occured.

  • CVE-2021-32558

    An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x before 18.5.1, and Certified Asterisk before 16.8-cert10. If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.

For Debian 9 Stretch, these problems have been fixed in version 1:13.14.1~dfsg-2+deb9u5.

We recommend that you upgrade your asterisk packages.

In addition, Asterisk are tracking this issue as AST-2021-008

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: