========================================================================== Ubuntu Security Notice USN-5066-2 September 08, 2021
python-pysaml2 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM Summary: PySAML2 could be made to accept invalid SAML documents. Software Description: - python-pysaml2: Pure python implementation of SAML2 Details: 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 documents. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: python-pysaml2 3.0.0-3ubuntu1.16.04.4+esm1 python3-pysaml2 3.0.0-3ubuntu1.16.04.4+esm1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5066-2 https://ubuntu.com/security/notices/USN-5066-1 CVE-2021-21239
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