CVE-2020-28010

NameCVE-2020-28010
DescriptionExim 4 before 4.94.2 allows Out-of-bounds Write because the main function, while setuid root, copies the current working directory pathname into a buffer that is too small (on some common platforms).
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)
ReferencesDSA-4912-1
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exim4 (PTS)stretch4.89-2+deb9u7fixed
stretch (security)4.89-2+deb9u8fixed
buster4.92-8+deb10u5vulnerable
buster (security)4.92-8+deb10u6fixed
bullseye4.94.2-1fixed
sid4.94.2-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exim4sourcestretch(not affected)
exim4sourcebuster4.92-8+deb10u6DSA-4912-1
exim4source(unstable)4.94.2-1

Notes

[stretch] - exim4 <not-affected> (Vulnerable code introduced later)
Introduced by: https://git.exim.org/exim.git/commit/805fd869d551c36d1d77ab2b292a7008d643ca79 (exim-4.92-RC1)
https://www.openwall.com/lists/oss-security/2021/05/04/7

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