CVE-2020-28013

NameCVE-2020-28013
DescriptionExim 4 before 4.94.2 allows Heap-based Buffer Overflow because it mishandles "-F '.('" on the command line, and thus may allow privilege escalation from any user to root. This occurs because of the interpretation of negative sizes in strncpy.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2650-1, DSA-4912-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exim4 (PTS)bullseye (security), bullseye4.94.2-7+deb11u3fixed
bookworm, bookworm (security)4.96-15+deb12u5fixed
sid, trixie4.98-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exim4sourcestretch4.89-2+deb9u8DLA-2650-1
exim4sourcebuster4.92-8+deb10u6DSA-4912-1
exim4source(unstable)4.94.2-1

Notes

https://www.openwall.com/lists/oss-security/2021/05/04/7
Search for package or bug name: Reporting problems