CVE-2024-39929

EUVD-2024-38307
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.4 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CISA-ADPADP
5.4 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 98%
Affected Products (NVD)
VendorProductVersion
eximexim
𝑥
≤ 4.97.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
exim4
bookworm
4.96-15+deb12u7
fixed
bookworm (security)
4.96-15+deb12u7
fixed
bullseye
4.94.2-7+deb11u3
fixed
bullseye (security)
4.94.2-7+deb11u4
fixed
forky
4.99.1-1
fixed
sid
4.99.1-1
fixed
trixie
4.98.2-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
exim4
bionic
Fixed 4.90.1-1ubuntu1.10+esm5
released
focal
Fixed 4.93-13ubuntu1.12
released
jammy
Fixed 4.95-4ubuntu2.6
released
mantic
ignored
noble
Fixed 4.97-4ubuntu4.1
released
trusty
not-affected
xenial
Fixed 4.86.2-2ubuntu2.6+esm8
released
Common Weakness Enumeration
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
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