Medium severity · published Jul 4, 2024
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…
5.4
CVSS
41.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)41.5% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EX
Exim · Exim
through 4.97.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-39929
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-39929
Exploit
https://bugs.exim.org/show_bug.cgi?id=3099#c4
Patch
https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b
Patch
https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357
Release Notes
https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3
Not Applicable
https://www.rfc-editor.org/rfc/rfc2231.txt
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