Bug 1227423 (CVE-2024-39929)

Summary:	VUL-0: CVE-2024-39929: exim: Incorrect parsing of multiline rfc2231 header filename
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Peter Wullinger <wullinger>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	rfrohl
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/412866/
Whiteboard:
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-07-05 07:26:23 UTC

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:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-39929
https://bugzilla.redhat.com/show_bug.cgi?id=2295819
https://www.cve.org/CVERecord?id=CVE-2024-39929
https://bugs.exim.org/show_bug.cgi?id=3099
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

Comment 1 Robert Frohl 2024-07-05 07:28:34 UTC

relevant for Factory and Backports

Comment 2 OBSbugzilla Bot 2024-07-15 17:05:28 UTC

This is an autogenerated message for OBS integration:
This bug (1227423) was mentioned in
https://build.opensuse.org/request/show/1187596 Factory / exim
https://build.opensuse.org/request/show/1187597 Backports:SLE-15-SP6 / exim

Comment 3 OBSbugzilla Bot 2024-07-21 17:15:02 UTC

This is an autogenerated message for OBS integration:
This bug (1227423) was mentioned in
https://build.opensuse.org/request/show/1188907 Backports:SLE-15-SP5 / exim