It was discovered that pysaml2, a Python implementation of SAML to be used in a WSGI environment, was susceptible to XML signature wrapping attacks, which could result in a bypass of signature verification.

For Debian 8 Jessie, this problem has been fixed in version 2.0.0-1+deb8u3.

We recommend that you upgrade your python-pysaml2 packages.

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