{"id":"UBUNTU-CVE-2021-43999","details":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","modified":"2026-04-22T13:03:14.958932Z","published":"2022-01-11T22:15:00Z","upstream":["CVE-2021-43999"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-43999"},{"type":"REPORT","url":"https://lists.apache.org/thread/4dt9h5mo4o9rxlgxm3rp8wfqdtdjn2z9"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-43999"}],"affected":[{"package":{"name":"guacamole-server","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/guacamole-server@0.8.3-2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.3-1build2","0.8.3-2"],"ecosystem_specific":{"binaries":[{"binary_name":"guacd","binary_version":"0.8.3-2"},{"binary_name":"libguac-client-rdp0","binary_version":"0.8.3-2"},{"binary_name":"libguac-client-ssh0","binary_version":"0.8.3-2"},{"binary_name":"libguac-client-vnc0","binary_version":"0.8.3-2"},{"binary_version":"0.8.3-2","binary_name":"libguac5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43999.json"}},{"package":{"name":"guacamole-server","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/guacamole-server@0.9.9-2build1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.9-2","0.9.9-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"guacd","binary_version":"0.9.9-2build1"},{"binary_version":"0.9.9-2build1","binary_name":"libguac-client-rdp0"},{"binary_name":"libguac-client-ssh0","binary_version":"0.9.9-2build1"},{"binary_name":"libguac-client-telnet0","binary_version":"0.9.9-2build1"},{"binary_name":"libguac-client-vnc0","binary_version":"0.9.9-2build1"},{"binary_name":"libguac11","binary_version":"0.9.9-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43999.json"}},{"package":{"name":"guacamole-server","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/guacamole-server@1.3.0-1.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-1","1.3.0-1build1","1.3.0-1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"guacd","binary_version":"1.3.0-1.1"},{"binary_name":"libguac-client-rdp0","binary_version":"1.3.0-1.1"},{"binary_name":"libguac-client-ssh0","binary_version":"1.3.0-1.1"},{"binary_name":"libguac-client-telnet0","binary_version":"1.3.0-1.1"},{"binary_name":"libguac-client-vnc0","binary_version":"1.3.0-1.1"},{"binary_name":"libguac19","binary_version":"1.3.0-1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43999.json"}},{"package":{"name":"guacamole-server","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/guacamole-server@1.3.0-1.3ubuntu1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-1.1","1.3.0-1.3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"guacd","binary_version":"1.3.0-1.3ubuntu1"},{"binary_name":"libguac-client-rdp0t64","binary_version":"1.3.0-1.3ubuntu1"},{"binary_version":"1.3.0-1.3ubuntu1","binary_name":"libguac-client-ssh0t64"},{"binary_version":"1.3.0-1.3ubuntu1","binary_name":"libguac-client-telnet0t64"},{"binary_name":"libguac-client-vnc0t64","binary_version":"1.3.0-1.3ubuntu1"},{"binary_name":"libguac19t64","binary_version":"1.3.0-1.3ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43999.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}