CVE-2015-3420

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-09-19 · updated 2026-06-17
Weakness: CWE-295

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.

Affected products

dovecot: through 2.2.16
Fedoraproject Fedora: 20, 21, 22

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
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

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