Updated Exim packages are available for both Debian GNU/Linux 8 (Jessie) and 9 (Stretch) Extended LTS:
ELA-1126-1 exim4 security update
ELA-1126-1 exim4 security update
ELA-1126-1 exim4 security update
Package : exim4
Version : 4.84.2-2+deb8u12 (jessie), 4.89-2+deb9u12 (stretch)
Related CVEs :
CVE-2023-51766
It was discovered that Exim, a mail transport agent, can be induced to accept a
second message embedded as part of the body of a first message in certain
configurations where PIPELINING or CHUNKING on incoming connections is offered.