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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-3420 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the versions of dovecot as shipped with Red Hat Enterprise Linux 5, 6, and 7.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 4.3 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:N/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | dovecot | Not affected |
| Red Hat Enterprise Linux 6 | dovecot | Not affected |
| Red Hat Enterprise Linux 5 | dovecot | Not affected |
Vulmon