{"id":"USN-4656-2","summary":"xorg-server vulnerabilities","details":"USN-4656-1 fixed several vulnerabilities in X.Org. This update provides\nthe corresponding update for Ubuntu 14.04 ESM.\n\nOriginal advisory details:\n\n Jan-Niklas Sohn discovered that the X.Org X Server XKB extension\n incorrectly handled certain inputs. A local attacker could possibly use\n this issue to escalate privileges.\n","modified":"2026-02-10T04:41:59Z","published":"2020-12-07T15:14:43Z","related":["UBUNTU-CVE-2020-14360","UBUNTU-CVE-2020-25712"],"upstream":["CVE-2020-14360","CVE-2020-25712","UBUNTU-CVE-2020-14360","UBUNTU-CVE-2020-25712"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4656-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-14360"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25712"}],"affected":[{"package":{"name":"xorg-server","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/xorg-server@2:1.15.1-0ubuntu2.11+esm3?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.15.1-0ubuntu2.11+esm3"}]}],"versions":["2:1.14.3-3ubuntu2","2:1.14.3-3ubuntu3","2:1.14.3-3ubuntu4","2:1.14.3-5ubuntu1","2:1.14.4-1ubuntu1","2:1.14.4-1ubuntu2","2:1.14.4.901-0ubuntu2","2:1.14.5-1ubuntu2","2:1.14.5-1ubuntu4","2:1.15.0-1ubuntu1","2:1.15.0-1ubuntu2","2:1.15.0-1ubuntu3","2:1.15.0-1ubuntu4","2:1.15.0-1ubuntu6","2:1.15.0-1ubuntu7","2:1.15.1-0ubuntu1","2:1.15.1-0ubuntu2","2:1.15.1-0ubuntu2.1","2:1.15.1-0ubuntu2.4","2:1.15.1-0ubuntu2.5","2:1.15.1-0ubuntu2.6","2:1.15.1-0ubuntu2.7","2:1.15.1-0ubuntu2.9","2:1.15.1-0ubuntu2.10","2:1.15.1-0ubuntu2.11","2:1.15.1-0ubuntu2.11+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xdmx"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xdmx-tools"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xnest"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xorg-server-source"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xserver-common"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xserver-xephyr"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xserver-xorg-core"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xserver-xorg-dev"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xserver-xorg-xmir"},{"binary_version":"2:1.15.1-0ubuntu2.11+esm3","binary_name":"xvfb"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-14360"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-25712"}],"ecosystem":"Ubuntu:Pro:14.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4656-2.json"}}],"schema_version":"1.7.3"}