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

Package : asterisk
Version : 1:11.13.1~dfsg-2+deb8u7
CVE ID : CVE-2019-13161 CVE-2019-18610 CVE-2019-18790

Several vulnerabilites are fixed in Asterisk,
an Open Source PBX and telephony toolkit.

CVE-2019-13161
An attacker was able to crash Asterisk when handling an SDP answer to an
outgoing T.38 re-invite.

CVE-2019-18610
Remote authenticated Asterisk Manager Interface (AMI) users without
system authorization could execute arbitrary system commands.

CVE-2019-18790
A SIP call hijacking vulnerability.

For Debian 8 "Jessie", these problems have been fixed in version
1:11.13.1~dfsg-2+deb8u7.

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