{"id":"UBUNTU-CVE-2020-25697","details":"A privilege escalation flaw was found in the Xorg-x11-server due to a lack of authentication for X11 clients. This flaw allows an attacker to take control of an X application by impersonating the server it is expecting to connect to.","modified":"2026-04-22T12:36:40.545715Z","published":"2021-05-26T13:15:00Z","upstream":["CVE-2020-25697"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25697"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2020/11/09/3"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-25697"}],"affected":[{"package":{"name":"libx11","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.2-1ubuntu2.1+esm5?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.6.1-1ubuntu1","2:1.6.1-1ubuntu2","2:1.6.2-1ubuntu1","2:1.6.2-1ubuntu2","2:1.6.2-1ubuntu2.1","2:1.6.2-1ubuntu2.1+esm1","2:1.6.2-1ubuntu2.1+esm2","2:1.6.2-1ubuntu2.1+esm3","2:1.6.2-1ubuntu2.1+esm4","2:1.6.2-1ubuntu2.1+esm5"],"ecosystem_specific":{"binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.2-1ubuntu2.1+esm5"},{"binary_name":"libx11-data","binary_version":"2:1.6.2-1ubuntu2.1+esm5"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.2-1ubuntu2.1+esm5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25697.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.3-1ubuntu2.2+esm4?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.6.3-1ubuntu2","2:1.6.3-1ubuntu2.1","2:1.6.3-1ubuntu2.2","2:1.6.3-1ubuntu2.2+esm1","2:1.6.3-1ubuntu2.2+esm2","2:1.6.3-1ubuntu2.2+esm3","2:1.6.3-1ubuntu2.2+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.3-1ubuntu2.2+esm4"},{"binary_name":"libx11-data","binary_version":"2:1.6.3-1ubuntu2.2+esm4"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.3-1ubuntu2.2+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25697.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.4-3ubuntu0.4+esm2?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.6.4-3","2:1.6.4-3ubuntu0.1","2:1.6.4-3ubuntu0.2","2:1.6.4-3ubuntu0.3","2:1.6.4-3ubuntu0.4","2:1.6.4-3ubuntu0.4+esm1","2:1.6.4-3ubuntu0.4+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.4-3ubuntu0.4+esm2"},{"binary_name":"libx11-data","binary_version":"2:1.6.4-3ubuntu0.4+esm2"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.4-3ubuntu0.4+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25697.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.9-2ubuntu1.6?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.6.8-1","2:1.6.9-2","2:1.6.9-2ubuntu1","2:1.6.9-2ubuntu1.1","2:1.6.9-2ubuntu1.2","2:1.6.9-2ubuntu1.5","2:1.6.9-2ubuntu1.6"],"ecosystem_specific":{"binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.9-2ubuntu1.6"},{"binary_name":"libx11-data","binary_version":"2:1.6.9-2ubuntu1.6"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.9-2ubuntu1.6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25697.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.7.5-1ubuntu0.3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.7.2-1","2:1.7.2-2","2:1.7.2-2build1","2:1.7.5-1","2:1.7.5-1ubuntu0.2","2:1.7.5-1ubuntu0.3"],"ecosystem_specific":{"binaries":[{"binary_name":"libx11-6","binary_version":"2:1.7.5-1ubuntu0.3"},{"binary_name":"libx11-data","binary_version":"2:1.7.5-1ubuntu0.3"},{"binary_name":"libx11-xcb1","binary_version":"2:1.7.5-1ubuntu0.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25697.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}