Vulnerability in Dovecot
CVE-2015-3420
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.028 (86.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Dovecot
- Fedoraproject Fedora — versions 20, 21, 22
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2015/04/28/4 (mailing-list, Mailing List, Third Party Advisory)
- dovecot.org/pipermail/dovecot/2015-April/100618.html (Vendor Advisory, mailing-list)
- dovecot.org/pipermail/dovecot-news/2015-May/000292.html (Vendor Advisory, mailing-list)
- lists.fedoraproject.org/pipermail/package-announce/2015-May/158261.html (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-May/157030.html (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/pipermail/package-announce/2015-May/158236.html (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2015/04/27/1 (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/74335 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2015-3420?
- CVE-2015-3420 is a medium-severity vulnerability in Dovecot, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2017-09-19.
- How severe is CVE-2015-3420?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2015-3420 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.