DescriptionThe auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.
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 Bugs846605

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dovecot (PTS)stretch1:2.2.27-3+deb9u5fixed
stretch (security)1:2.2.27-3+deb9u6fixed
buster (security)1:
bullseye, sid1:

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dovecotsourcewheezy(not affected)
dovecotsourcejessie(not affected)


[jessie] - dovecot <not-affected> (Only affects 2.2.25 up and including
[wheezy] - dovecot <not-affected> (Only affects 2.2.25 up and including

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