{"id":"USN-4974-1","summary":"lasso vulnerability","details":"It was discovered that Lasso did not properly verify that all\nassertions in a SAML response were properly signed. An attacker\ncould possibly use this to impersonate users or otherwise bypass\naccess controls.\n","modified":"2026-04-27T18:44:25.812976Z","published":"2021-06-02T03:15:08Z","related":["UBUNTU-CVE-2021-28091"],"upstream":["CVE-2021-28091","UBUNTU-CVE-2021-28091"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4974-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28091"}],"affected":[{"package":{"name":"lasso","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/lasso@2.5.1-0ubuntu1.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1-0ubuntu1.2"}]}],"versions":["2.5.0-5build4","2.5.0-5build5","2.5.0-5ubuntu1","2.5.1-0ubuntu1","2.5.1-0ubuntu1.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"liblasso-perl","binary_version":"2.5.1-0ubuntu1.2"},{"binary_name":"liblasso3","binary_version":"2.5.1-0ubuntu1.2"},{"binary_name":"python-lasso","binary_version":"2.5.1-0ubuntu1.2"},{"binary_name":"python3-lasso","binary_version":"2.5.1-0ubuntu1.2"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-28091","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4974-1.json"}},{"package":{"name":"lasso","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/lasso@2.6.0-7ubuntu1.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.0-7ubuntu1.2"}]}],"versions":["2.6.0-2ubuntu1","2.6.0-2ubuntu2","2.6.0-7ubuntu1","2.6.0-7ubuntu1.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"liblasso-perl","binary_version":"2.6.0-7ubuntu1.2"},{"binary_name":"liblasso3","binary_version":"2.6.0-7ubuntu1.2"},{"binary_name":"python3-lasso","binary_version":"2.6.0-7ubuntu1.2"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-28091","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4974-1.json"}}],"schema_version":"1.7.5"}