CVE-2017-2670: Debian Linux

High severity, CVSS 7.5. EPSS: 3.6% chance of exploitation in the next 30 days.

It was found in Undertow before 1.3.28 that with non-clean TCP close, the Websocket server gets into infinite loop on every IO thread, effectively causing DoS.

Affected products

• Debian Debian Linux: version 9.0 only
• Red Hat JBoss Enterprise Application Platform: version 6.0.0 only; version 7.0.0 only; version 7.1.0 only
• Red Hat Undertow: before 1.3.28 (fixed in 1.3.28)

Published 2018-07-27. Last modified 2026-06-17.