CVE-2018-17540: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

The gmp plugin in strongSwan before 5.7.1 has a Buffer Overflow via a crafted certificate.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Strongswan Strongswan: before 5.7.1 (fixed in 5.7.1)

Published 2018-10-03. Last modified 2026-06-17.