CVE-2020-8793

NameCVE-2020-8793
DescriptionOpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.
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)
NVD severitymedium
Debian Bugs952453

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
opensmtpd (PTS)stretch (security), stretch6.0.2p1-2+deb9u3fixed
buster, buster (security)6.0.3p1-5+deb10u4fixed
bullseye, sid6.7.1p1-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensmtpdsourcestretch6.0.2p1-2+deb9u3
opensmtpdsourcebuster6.0.3p1-5+deb10u4
opensmtpdsource(unstable)6.6.4p1-1unimportant952453

Notes

https://www.openwall.com/lists/oss-security/2020/02/24/4
https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/021_smtpd_envelope.patch.sig
https://poolp.org/posts/2020-01-30/opensmtpd-advisory-dissected/
Neutralised by kernel hardening

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