CVE-2020-28020

NameCVE-2020-28020
DescriptionExim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2650-1
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exim4 (PTS)stretch4.89-2+deb9u7vulnerable
stretch (security)4.89-2+deb9u8fixed
buster4.92-8+deb10u5fixed
buster (security)4.92-8+deb10u6fixed
bullseye4.94.2-1fixed
sid4.94.2-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exim4sourcestretch4.89-2+deb9u8DLA-2650-1
exim4source(unstable)4.92~RC5-1

Notes

Fixed by: https://git.exim.org/exim.git/commit/56ac062a3ff94fc4e1bbfc2293119c079a4e980b (exim-4.92-RC5)
https://www.openwall.com/lists/oss-security/2021/05/04/7

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