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
EPSS: 0.028 (85.2th percentile) — read the EPSS interpretation.
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.
Affected products
- Dovecot
- Fedoraproject Fedora — versions 20, 21, 22
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (Vendor Advisory, mailing-list, x_refsource_MLIST)
- cve@mitre.org (Vendor Advisory, mailing-list, x_refsource_MLIST)
- cve@mitre.org (vendor-advisory, x_refsource_FEDORA, Third Party Advisory)
- cve@mitre.org (vendor-advisory, x_refsource_FEDORA, Third Party Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- cve@mitre.org (vendor-advisory, x_refsource_FEDORA, Third Party Advisory)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
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.