CVE-2024-39929

medium

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.

References

https://www.rfc-editor.org/rfc/rfc2231.txt

https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3

https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357

https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b

https://bugs.exim.org/show_bug.cgi?id=3099#c4

Details

Source: Mitre, NVD

Published: 2024-07-04

Updated: 2025-03-18

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 5.4

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.28158

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability Being Monitored

Detections

Analytics