CVE-2024-39929 Affecting exim4 package, versions <4.94.2-7+deb11u3
Threat Intelligence
EPSS
0.05% (17th
percentile)
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Test your applications- Snyk ID SNYK-DEBIAN11-EXIM4-7424567
- published 5 Jul 2024
- disclosed 4 Jul 2024
How to fix?
Upgrade Debian:11 exim4 to version 4.94.2-7+deb11u3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream exim4 package and not the exim4 package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.
References
- https://security-tracker.debian.org/tracker/CVE-2024-39929
- https://bugs.exim.org/show_bug.cgi?id=3099#c4
- https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b
- https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357
- https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3
- https://www.rfc-editor.org/rfc/rfc2231.txt