{"id":"USN-5066-2","summary":"python-pysaml2 vulnerability","details":"USN-5066-1 fixed a vulnerability in PySAML2. This update provides\nthe corresponding update for Ubuntu 16.04 ESM.\n\nOriginal advisory details:\n\n Brian Wolff discovered that PySAML2 incorrectly validated cryptographic\n signatures. A remote attacker could possibly use this issue to alter SAML\n documents.\n","modified":"2026-02-10T04:42:18Z","published":"2021-09-08T13:28:00Z","related":["UBUNTU-CVE-2021-21239"],"upstream":["CVE-2021-21239","UBUNTU-CVE-2021-21239"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5066-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-21239"}],"affected":[{"package":{"name":"python-pysaml2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/python-pysaml2@3.0.0-3ubuntu1.16.04.4+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.0-3ubuntu1.16.04.4+esm1"}]}],"versions":["2.4.0-0ubuntu2","3.0.0-3ubuntu1","3.0.0-3ubuntu1.16.04.1","3.0.0-3ubuntu1.16.04.3","3.0.0-3ubuntu1.16.04.4"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.0-3ubuntu1.16.04.4+esm1","binary_name":"python-pysaml2"},{"binary_version":"3.0.0-3ubuntu1.16.04.4+esm1","binary_name":"python3-pysaml2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5066-2.json","cves_map":{"cves":[{"id":"CVE-2021-21239","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}}],"schema_version":"1.7.3"}