Vulnerability Monitor

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CVE-2024-39929

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.

Published

2024-07-04T15:15:10.323

Last Modified

2025-07-10T22:15:25.230

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 5.4 (MEDIUM)

Weaknesses

Type: Secondary
CWE-116

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	exim	exim	≤ 4.97.1	Yes

References

https://bugs.exim.org/show_bug.cgi?id=3099#c4 Exploit, Vendor Advisory ([email protected])
https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b Patch ([email protected])
https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357 Patch ([email protected])
https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3 Release Notes ([email protected])
https://www.rfc-editor.org/rfc/rfc2231.txt Not Applicable ([email protected])
https://bugs.exim.org/show_bug.cgi?id=3099#c4 Exploit, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b Patch (af854a3a-2127-422b-91ae-364da2661108)
https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3 Release Notes (af854a3a-2127-422b-91ae-364da2661108)
https://www.rfc-editor.org/rfc/rfc2231.txt Not Applicable (af854a3a-2127-422b-91ae-364da2661108)