Debian: DLA-2209-1 Moderate: Tomcat8 Security Update and Threats

debian lts

May 28, 2020

Several security vulnerabilities have been discovered in the Tomcat servlet and JSP engine

Topics Covered

security advisory remote code execution Debian tomcat session fixation http smuggling

Summary

WARNING: The fix for CVE-2020-1938 may disrupt services that rely on a
working AJP configuration. The option secretRequired defaults to true
now. You should define a secret in your server.xml or you can revert
back by setting secretRequired to false.

CVE-2019-17563

When using FORM authentication with Apache Tomcat there was a narrow
window where an attacker could perform a session fixation attack.
The window was considered too narrow for an exploit to be practical
but, erring on the side of caution, this issue has been treated as a
security vulnerability.

CVE-2020-1935

In Apache Tomcat the HTTP header parsing code used an approach to
end-of-line parsing that allowed some invalid HTTP headers to be
parsed as valid. This led to a possibility of HTTP Request Smuggling
if Tomcat was located behind a reverse proxy that incorrectly
handled the invalid Transfer-Encoding header in a particular manner.
Such a reverse proxy is considered unlikely.

CVE-2020-1938