Fixed in Apache Tomcat 9.0.0.M15

Note: The issue below was fixed in Apache Tomcat 9.0.0.M14 but the release vote for the 9.0.0.M14 release candidate did not pass. Therefore, although users must download 9.0.0.M15 to obtain a version that includes the fix for this issue, version 9.0.0.M14 is not included in the list of affected versions.

Important: Information Disclosure CVE-2016-8745

A bug in the error handling of the send file code for the NIO HTTP connector resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, but not limited to, session ID and the response body.

This was fixed in revision 1771853.

This issue was identified by the Apache Tomcat Security Team on 8 December 2016 and made public on 12 December 2016.

Affects: 9.0.0.M1 to 9.0.0.M13