DescriptionThe ssl-proxy-openssl.c function in Dovecot before 2.2.17, when SSLv3 is disabled, allow remote attackers to cause a denial of service (login process crash) via vectors related to handshake failures.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs783649

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dovecot (PTS)buster1:
buster (security)1:
bookworm, sid1:

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

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


[wheezy] - dovecot <not-affected> (Problematic patch introducing the issue not applied)
[squeeze] - dovecot <not-affected> (Vulnerable code not present & not reproducible)
Segfault reproducible if using openssl/1.0.2a-1 from sid.
It is openssl crashing but because dovecot ignores an erlier
returned error from dovecot, related to openssl bug:
Possibly introduced due to

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