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: https://security-tracker.debian.org/tracker/tomcat9