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Debian Security Advisory DSA-5728-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
July 10, 2024                         https://www.debian.org/security/faq
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Package        : exim4
CVE ID         : CVE-2024-39929
Debian Bug     : 1075785

Phillip Szelat discovered that Exim, a mail transport agent, does not
properly parse a multiline RFC 2231 header filename, allowing a remote
attacker to bypass a $mime_filename based extension-blocking protection
mechanism.

For the oldstable distribution (bullseye), this problem has been fixed
in version 4.94.2-7+deb11u3.

For the stable distribution (bookworm), this problem has been fixed in
version 4.96-15+deb12u5.

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/

Mailing list: debian-security-announce@lists.debian.org
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