Vulnerability CVE-2015-3420
Published: 2017-09-19

Description:
The 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.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Dovecot remote DoS on TLS connections
Hanno Böck
27.04.2015

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Fedoraproject -> Fedora 
Dovecot -> Dovecot 

 References:
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157030.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158236.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158261.html
http://www.openwall.com/lists/oss-security/2015/04/27/1
http://www.openwall.com/lists/oss-security/2015/04/28/4
http://www.securityfocus.com/bid/74335
https://bugzilla.redhat.com/show_bug.cgi?id=1216057
https://dovecot.org/pipermail/dovecot-news/2015-May/000292.html
https://dovecot.org/pipermail/dovecot/2015-April/100618.html
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