CVE-2017-15132: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 3.1% chance of exploitation in the next 30 days.

A flaw was found in dovecot 2.0 up to 2.2.33 and 2.3.0. An abort of SASL authentication results in a memory leak in dovecot's auth client used by login processes. The leak has impact in high performance configuration where same login processes are reused and can cause the process to crash due to memory exhaustion.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 17.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• Dovecot Dovecot: from 2.0.0, up to and including 2.2.33; version 2.3.0 only

Published 2018-01-25. Last modified 2026-06-17.