Debian 8: DLA-2077-1 Critical Security Update for Tomcat7

When Apache Tomcat is configured with the JMX Remote Lifecycle
Listener, a local attacker without access to the Tomcat process
or configuration files is able to manipulate the RMI registry to
perform a man-in-the-middle attack to capture user names and
passwords used to access the JMX interface. The attacker can
then use these credentials to access the JMX interface and gain
complete control over the Tomcat instance.

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.

For Debian 8 "Jessie", these problems have been fixed in version
7.0.56-3+really7.0.99-1.

We recommend that you upgrade your tomcat7 packages.