CVE-2020-28023

NameCVE-2020-28023
DescriptionExim 4 before 4.94.2 allows Out-of-bounds Read. smtp_setup_msg may disclose sensitive information from process memory to an unauthenticated SMTP client.
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, DSA-4912-1
NVD severitymedium

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
buster, buster (security)4.92-8+deb10u6fixed
bullseye4.94.2-7fixed
bookworm, sid4.95-2fixed

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

Introduced by: https://git.exim.org/exim.git/commit/18481de384caecff421f23f715be916403f5d0ee (exim-4_88_RC1)
https://www.openwall.com/lists/oss-security/2021/05/04/7

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