A exim4 security update has been released for Debian GNU/Linux 8 LTS to address an authentication bypass vulnerability in the spa authentication driver.

DLA 2213-1: exim4 security update

Package : exim4
Version : 4.84.2-2+deb8u7
CVE ID : CVE-2020-12783

It was discovered that exim4, a mail transport agent, suffers from a
authentication bypass vulnerability in the spa authentication driver.
The spa authentication driver is not enabled by default.

For Debian 8 "Jessie", this problem has been fixed in version
4.84.2-2+deb8u7.

We recommend that you upgrade your exim4 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