Debian: DSA-5315-1 Critical: libxstream-java Denial of Service Fix

XStream serializes Java objects to XML and back again. Versions prior to
1.4.15-3+deb11u2 may allow a remote attacker to terminate the application with
a stack overflow error, resulting in a denial of service only via manipulation
of the processed input stream. The attack uses the hash code implementation for
collections and maps to force recursive hash calculation causing a stack
overflow. This update handles the stack overflow and raises an
InputManipulationException instead.

For the stable distribution (bullseye), this problem has been fixed in
version 1.4.15-3+deb11u2.

We recommend that you upgrade your libxstream-java packages.

For the detailed security status of libxstream-java please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libxstream-java

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/