Debian Security Advisory
DLA-2733-1 tomcat8 -- LTS security update
- Date Reported:
- 05 Aug 2021
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 991046, Bug 991046.
In Mitre's CVE dictionary: CVE-2021-30640, CVE-2021-33037.
- More information:
Several security vulnerabilities have been discovered in the Tomcat servlet and JSP engine.
A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm.
Apache Tomcat did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
For Debian 9 stretch, these problems have been fixed in version 8.5.54-0+deb9u7.
We recommend that you upgrade your tomcat8 packages.
For the detailed security status of tomcat8 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/tomcat8
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS