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.
Metrics
CVSS 3.1 5.4/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| exim | exim | <= 4.97.1 |
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
Timeline
- Published
- Jul 4, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed