An asterisk regression update has been released for Debian GNU/Linux 8 LTS

Package : asterisk
Version : 1:11.13.1~dfsg-2+deb8u8

The backport of the CVE-2019-13161 fix caused a regression and
has been reverted.

For Debian 8 "Jessie", this problem has been fixed in version
1:11.13.1~dfsg-2+deb8u8.

We recommend that you upgrade your asterisk packages.

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

cu
Adrian