VulnerabilityAnalyzed
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.
MEDIUM 5.4EPSS 41.2%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 41.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- EPSS
- 41.23% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-116
- Affected
- exim/exim
- Source
- cve@mitre.org
References
- https://bugs.exim.org/show_bug.cgi?id=3099#c4Exploit, Vendor Advisory
- https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7bPatch
- https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357Patch
- https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3Release Notes
- https://www.rfc-editor.org/rfc/rfc2231.txtNot Applicable
- https://bugs.exim.org/show_bug.cgi?id=3099#c4Exploit, Vendor Advisory
- https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7bPatch
- https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357Patch
- https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3Release Notes
- https://www.rfc-editor.org/rfc/rfc2231.txtNot Applicable
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.