CVE-2024-39929

Public Exploit

Description

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.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 33.45% Top 5%
Vendor Advisory exim.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357 patch
https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b patch
https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3 release notes
https://www.rfc-editor.org/rfc/rfc2231.txt not applicable
https://bugs.exim.org/show_bug.cgi?id=3099#c4 vendor advisory exploit

Frequently Asked Questions

What is the severity of CVE-2024-39929?
CVE-2024-39929 has been scored as a medium severity vulnerability.
How to fix CVE-2024-39929?
To fix CVE-2024-39929, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-39929 being actively exploited in the wild?
It is possible that CVE-2024-39929 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~33% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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