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)
Debian Bugs992172

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exim4 (PTS)buster4.92-8+deb10u6vulnerable
buster (security)4.92-8+deb10u9vulnerable
bullseye (security), bullseye4.94.2-7+deb11u2vulnerable
bookworm, bookworm (security)4.96-15+deb12u4fixed
sid, trixie4.97-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[bullseye] - exim4 <no-dsa> (Minor issue)
[buster] - exim4 <no-dsa> (Minor issue)
[stretch] - exim4 <postponed> (Minor issue, revisit when fixed upstream)

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