CVE-2017-6056: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 7.8% chance of exploitation in the next 30 days.

It was discovered that a programming error in the processing of HTTPS requests in the Apache Tomcat servlet and JSP engine may result in denial of service via an infinite loop. The denial of service is easily achievable as a consequence of backporting a CVE-2016-6816 fix but not backporting the fix for Tomcat bug 57544. Distributions affected by this backporting issue include Debian (before 7.0.56-3+deb8u8 and 8.0.14-1+deb8u7 in jessie) and Ubuntu.

Affected products

  • Canonical Ubuntu Linux: version 12.04 only; version 14.04 only
  • Debian Debian Linux: version 8.0 only

Published 2017-02-17. Last modified 2026-06-17.