CVE-2020-28021

EUVD-2020-20512
Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 91%
Affected Products (NVD)
VendorProductVersion
eximexim
4.00 ≤
𝑥
< 4.94.2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
exim4
bookworm
4.96-15+deb12u5
fixed
bookworm (security)
4.96-15+deb12u5
fixed
bullseye
4.94.2-7+deb11u3
fixed
bullseye (security)
4.94.2-7+deb11u4
fixed
sid
4.98-2
fixed
trixie
4.98-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
exim4
bionic
Fixed 4.90.1-1ubuntu1.8
released
focal
Fixed 4.93-13ubuntu1.5
released
groovy
Fixed 4.94-7ubuntu1.2
released
hirsute
Fixed 4.94-15ubuntu1.2
released
impish
Fixed 4.94-15ubuntu1.2
released
jammy
Fixed 4.94-15ubuntu1.2
released
trusty
Fixed 4.82-3ubuntu2.4+esm3
released
xenial
Fixed 4.86.2-2ubuntu2.6+esm1
released
References
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28021-MAUTH.txt
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28021-MAUTH.txt