==========================================================================
Ubuntu Security Notice USN-5066-1
September 08, 2021
python-pysaml2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
PySAML2 could be made to accept invalid SAML documents.
Software Description:
- python-pysaml2: Pure python implementation of SAML2
Details:
Brian Wolff discovered that PySAML2 incorrectly validated cryptographic
signatures. A remote attacker could possibly use this issue to alter SAML
documents.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.04:
python3-pysaml2 6.1.0-0ubuntu1.21.04.1
Ubuntu 20.04 LTS:
python3-pysaml2 4.9.0-0ubuntu3.1
Ubuntu 18.04 LTS:
python-pysaml2 4.0.2-0ubuntu3.2
python3-pysaml2 4.0.2-0ubuntu3.2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5066-1
CVE-2021-21239
Package Information:
https://launchpad.net/ubuntu/+source/python-pysaml2/6.1.0-0ubuntu1.21.04.1
https://launchpad.net/ubuntu/+source/python-pysaml2/4.9.0-0ubuntu3.1
https://launchpad.net/ubuntu/+source/python-pysaml2/4.0.2-0ubuntu3.2
