An exim4 security update has been released for Debian GNU/Linux 11 and 12 to address several vulnerabilities.

[SECURITY] [DSA 5512-1] exim4 security update

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Debian Security Advisory DSA-5512-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
October 02, 2023 https://www.debian.org/security/faq
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Package : exim4
CVE ID : CVE-2023-42114 CVE-2023-42115 CVE-2023-42116

Several vulnerabilities were discovered in Exim, a mail transport agent,
which could result in remote code execution if the EXTERNAL or SPA/NTLM
authenticators are used.

For the oldstable distribution (bullseye), these problems have been fixed
in version 4.94.2-7+deb11u1.

For the stable distribution (bookworm), these problems have been fixed in
version 4.96-15+deb12u2.

We recommend that you upgrade your exim4 packages.

For the detailed security status of exim4 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/exim4

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/