CVE-2017-15130: Canonical Ubuntu Linux

Medium severity, CVSS 5.9. EPSS: 2.6% chance of exploitation in the next 30 days.

A denial of service flaw was found in dovecot before 2.2.34. An attacker able to generate random SNI server names could exploit TLS SNI configuration lookups, leading to excessive memory usage and the process to restart.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Dovecot Dovecot: before 2.2.34 (fixed in 2.2.34)

Published 2018-03-02. Last modified 2026-06-17.