Debian: DSA-4630-1 Moderate: Python-Pysaml2 XML Signature Bypass

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 the oldstable distribution (stretch), this problem has been fixed
in version 3.0.0-5+deb9u1.

For the stable distribution (buster), this problem has been fixed in
version 5.4.1-2+deb10u1.

We recommend that you upgrade your python-pysaml2 packages.

For the detailed security status of python-pysaml2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-pysaml2

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/