DescriptionThe receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.
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 severityhigh (attack range: remote)
Debian Bugs882648

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
exim4 (PTS)jessie (security), jessie4.84.2-2+deb8u5fixed
stretch (security), stretch4.89-2+deb9u3fixed
buster, sid4.91-7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
exim4sourcejessie(not affected)
exim4sourcewheezy(not affected)


[jessie] - exim4 <not-affected> (ESMTP CHUNKING extension introduced in 4.88)
[wheezy] - exim4 <not-affected> (ESMTP CHUNKING extension introduced in 4.88)
4.89-10 adds a workaround which disables the affected code by default

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