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USN-5066-2: PySAML2 vulnerability

8 September 2021

PySAML2 could be made to accept invalid SAML documents.




USN-5066-1 fixed a vulnerability in PySAML2. This update provides
the corresponding update for Ubuntu 16.04 ESM.

Original advisory details:

Brian Wolff discovered that PySAML2 incorrectly validated cryptographic
signatures. A remote attacker could possibly use this issue to alter SAML

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04

In general, a standard system update will make all the necessary changes.


Related notices

  • USN-5066-1: python3-pysaml2, python-pysaml2-doc, python-pysaml2