CVE-2024-39929 Affecting exim package, versions <4.98-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALPINE320-EXIM-7444643
- published12 Jul 2024
- disclosed4 Jul 2024
Introduced: 4 Jul 2024
CVE-2024-39929 (opens in a new tab)How to fix?
Upgrade Alpine:3.20 exim to version 4.98-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream exim package and not the exim package as distributed by Alpine.
See How to fix? for Alpine:3.20 relevant fixed versions and status.
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://bugs.exim.org/show_bug.cgi?id=3099#c4
- https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b
- https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357
- https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3
- https://www.rfc-editor.org/rfc/rfc2231.txt