Description
Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports <LF>.<CR><LF> but some other popular e-mail servers do not.
References (22)
Scores
CVSS v3
5.3
EPSS
0.0164
EPSS Percentile
82.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Details
CWE
CWE-345
Status
published
Products (7)
debian/debian_linux
10.0
exim/exim
< 4.97.1
fedoraproject/extra_packages_for_enterprise_linux
7.0
fedoraproject/extra_packages_for_enterprise_linux
8.0
fedoraproject/extra_packages_for_enterprise_linux
9.0
fedoraproject/fedora
38
fedoraproject/fedora
39
Published
Dec 24, 2023
Tracked Since
Feb 18, 2026