Fixed in Apache Tomcat 9.0.40

Important: Information disclosure CVE-2021-24122

When serving resources from a network location using the NTFS file system it was possible to bypass security constraints and/or view the source code for JSPs in some configurations. The root cause was the unexpected behaviour of the JRE API File.getCanonicalPath() which in turn was caused by the inconsistent behaviour of the Windows API (FindFirstFileW) in some circumstances.

This was fixed with commit 935fc558.

This issue was reported the Apache Tomcat Security team by Ilja Brander on 26 October 2020. The issue was made public on 14 January 2021.

Affects: 9.0.0.M1 to 9.0.39

Moderate: HTTP/2 request header mix-up CVE-2020-17527

While investigating issue 64830 it was discovered that Apache Tomcat could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.

This was fixed with commit d56293f8.

This issue was identified by the Apache Tomcat Security team on 10 November 2020. The issue was made public on 3 December 2020.

Affects: 9.0.0-M1 to 9.0.39