Debian Security Advisory

DSA-5009-1 tomcat9 -- security update

Date Reported:
12 Nov 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-42340.
More information:

Apache Tomcat, the servlet and JSP engine, did not properly release an HTTP upgrade connection for WebSocket connections once the WebSocket connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.

For the stable distribution (bullseye), this problem has been fixed in version 9.0.43-2~deb11u3.

We recommend that you upgrade your tomcat9 packages.

For the detailed security status of tomcat9 please refer to its security tracker page at: