CVE-2024-39929
First published: Thu Jul 04 2024(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/exim4 | <4.90.1-1ubuntu1.10+ | 4.90.1-1ubuntu1.10+ |
| ubuntu/exim4 | <4.93-13ubuntu1.12 | 4.93-13ubuntu1.12 |
| ubuntu/exim4 | <4.95-4ubuntu2.6 | 4.95-4ubuntu2.6 |
| ubuntu/exim4 | <4.97-4ubuntu4.1 | 4.97-4ubuntu4.1 |
| ubuntu/exim4 | <4.86.2-2ubuntu2.6+ | 4.86.2-2ubuntu2.6+ |
| debian/exim4 | <=4.94.2-7+deb11u2<=4.96-15+deb12u4 | 4.94.2-7+deb11u3 4.96-15+deb12u5 4.98-1 |
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Reference Links
- 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
- https://www.bleepingcomputer.com/news/security/critical-exim-bug-bypasses-security-filters-on-15-million-mail-servers/
- https://www.cve.org/CVERecord?id=CVE-2024-39929
- https://ubuntu.com/security/notices/USN-6939-1
- https://nvd.nist.gov/vuln/detail/CVE-2024-39929
- https://launchpad.net/bugs/cve/CVE-2024-39929
- https://security-tracker.debian.org/tracker/CVE-2024-39929
- https://ubuntu.com/security/CVE-2024-39929
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