CVE-2021-38371

NameCVE-2021-38371
DescriptionThe STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesELA-868-1
Debian Bugs992172

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exim4 (PTS)jessie, jessie (lts)4.84.2-2+deb8u11fixed
stretch (security)4.89-2+deb9u8vulnerable
stretch (lts), stretch4.89-2+deb9u11fixed
buster4.92-8+deb10u6vulnerable
buster (security)4.92-8+deb10u9vulnerable
bullseye (security), bullseye4.94.2-7+deb11u2vulnerable
bookworm (security), bookworm4.96-15+deb12u4fixed
trixie4.97-5fixed
sid4.97-6fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exim4sourcejessie4.84.2-2+deb8u10ELA-868-1
exim4sourcestretch4.89-2+deb9u10ELA-868-1
exim4source(unstable)4.95~RC2-1992172

Notes

[bullseye] - exim4 <no-dsa> (Minor issue)
[buster] - exim4 <no-dsa> (Minor issue)
[stretch] - exim4 <postponed> (Minor issue, revisit when fixed upstream)
https://nostarttls.secvuln.info
https://www.exim.org/static/doc/security/CVE-2021-38371.txt

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