========================================================================= Ubuntu Security Notice USN-4245-1 January 21, 2020 python-pysaml2 vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 19.10 - Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: PySAML2 could be made to bypass signature verification with arbitrary data. Software Description: - python-pysaml2: Pure python implementation of SAML2 Details: It was discovered that PySAML2 incorrectly handled certain SAML files. An attacker could possibly use this issue to bypass signature verification with arbitrary data. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10: python-pysaml2 4.5.0+dfsg1-0ubuntu2.19.10.1 python3-pysaml2 4.5.0+dfsg1-0ubuntu2.19.10.1 Ubuntu 19.04: python-pysaml2 4.5.0+dfsg1-0ubuntu2.19.04.1 python3-pysaml2 4.5.0+dfsg1-0ubuntu2.19.04.1 Ubuntu 18.04 LTS: python-pysaml2 4.0.2-0ubuntu3.1 python3-pysaml2 4.0.2-0ubuntu3.1 Ubuntu 16.04 LTS: python-pysaml2 3.0.0-3ubuntu1.16.04.4 python3-pysaml2 3.0.0-3ubuntu1.16.04.4 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/4245-1 CVE-2020-5390 Package Information: https://launchpad.net/ubuntu/+source/python-pysaml2/4.5.0+dfsg1-0ubuntu2.19.10.1 https://launchpad.net/ubuntu/+source/python-pysaml2/4.5.0+dfsg1-0ubuntu2.19.04.1 https://launchpad.net/ubuntu/+source/python-pysaml2/4.0.2-0ubuntu3.1 https://launchpad.net/ubuntu/+source/python-pysaml2/3.0.0-3ubuntu1.16.04.4