{"id":"USN-6555-1","summary":"xorg-server, xwayland vulnerabilities","details":"Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled XKB\nbutton actions. An attacker could possibly use this issue to cause the X\nServer to crash, execute arbitrary code, or escalate privileges.\n(CVE-2023-6377)\n\nJan-Niklas Sohn discovered that the X.Org X Server incorrectly handled\nmemory when processing the RRChangeOutputProperty and\nRRChangeProviderProperty APIs. An attacker could possibly use this issue to\ncause the X Server to crash, or obtain sensitive information.\n(CVE-2023-6478)\n","modified":"2026-04-27T17:00:11.016049Z","published":"2023-12-13T13:23:48Z","related":["UBUNTU-CVE-2023-6377","UBUNTU-CVE-2023-6478"],"upstream":["CVE-2023-6377","CVE-2023-6478","UBUNTU-CVE-2023-6377","UBUNTU-CVE-2023-6478"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6555-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-6377"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-6478"}],"affected":[{"package":{"name":"xorg-server","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/xorg-server@2:1.20.13-1ubuntu1~20.04.12?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.20.13-1ubuntu1~20.04.12"}]}],"versions":["2:1.20.5+git20191008-0ubuntu1","2:1.20.6-1ubuntu1","2:1.20.7-2ubuntu1","2:1.20.7-2ubuntu2","2:1.20.8-2ubuntu2","2:1.20.8-2ubuntu2.1","2:1.20.8-2ubuntu2.2","2:1.20.8-2ubuntu2.3","2:1.20.8-2ubuntu2.4","2:1.20.8-2ubuntu2.6","2:1.20.9-2ubuntu1.1~20.04.1","2:1.20.9-2ubuntu1.2~20.04.1","2:1.20.9-2ubuntu1.2~20.04.2","2:1.20.11-1ubuntu1~20.04.2","2:1.20.13-1ubuntu1~20.04.2","2:1.20.13-1ubuntu1~20.04.3","2:1.20.13-1ubuntu1~20.04.4","2:1.20.13-1ubuntu1~20.04.5","2:1.20.13-1ubuntu1~20.04.6","2:1.20.13-1ubuntu1~20.04.8","2:1.20.13-1ubuntu1~20.04.9"],"ecosystem_specific":{"binaries":[{"binary_name":"xdmx","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xdmx-tools","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xnest","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xorg-server-source","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xserver-common","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xserver-xephyr","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xserver-xorg-core","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xserver-xorg-legacy","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xvfb","binary_version":"2:1.20.13-1ubuntu1~20.04.12"},{"binary_name":"xwayland","binary_version":"2:1.20.13-1ubuntu1~20.04.12"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6555-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","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":"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-2023-6377"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2023-6478"}]}}},{"package":{"name":"xorg-server","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/xorg-server@2:21.1.4-2ubuntu1.7~22.04.5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:21.1.4-2ubuntu1.7~22.04.5"}]}],"versions":["2:1.20.13-1ubuntu1","2:1.20.13-1ubuntu2","2:1.20.14-1ubuntu1","2:21.1.3-2ubuntu2","2:21.1.3-2ubuntu2.1","2:21.1.3-2ubuntu2.2","2:21.1.3-2ubuntu2.3","2:21.1.3-2ubuntu2.4","2:21.1.3-2ubuntu2.5","2:21.1.3-2ubuntu2.6","2:21.1.3-2ubuntu2.7","2:21.1.3-2ubuntu2.8","2:21.1.3-2ubuntu2.9","2:21.1.4-2ubuntu1.7~22.04.1","2:21.1.4-2ubuntu1.7~22.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"xnest","binary_version":"2:21.1.4-2ubuntu1.7~22.04.5"},{"binary_name":"xorg-server-source","binary_version":"2:21.1.4-2ubuntu1.7~22.04.5"},{"binary_name":"xserver-common","binary_version":"2:21.1.4-2ubuntu1.7~22.04.5"},{"binary_name":"xserver-xephyr","binary_version":"2:21.1.4-2ubuntu1.7~22.04.5"},{"binary_name":"xserver-xorg-core","binary_version":"2:21.1.4-2ubuntu1.7~22.04.5"},{"binary_name":"xserver-xorg-legacy","binary_version":"2:21.1.4-2ubuntu1.7~22.04.5"},{"binary_name":"xvfb","binary_version":"2:21.1.4-2ubuntu1.7~22.04.5"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6555-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","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":"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-2023-6377"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2023-6478"}]}}},{"package":{"name":"xwayland","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/xwayland@2:22.1.1-1ubuntu0.9?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:22.1.1-1ubuntu0.9"}]}],"versions":["2:21.1.2-0ubuntu1","2:21.1.3-1","2:21.1.3-1ubuntu1","2:21.1.4-1","2:22.1.0-1","2:22.1.1-1","2:22.1.1-1ubuntu0.1","2:22.1.1-1ubuntu0.2","2:22.1.1-1ubuntu0.3","2:22.1.1-1ubuntu0.4","2:22.1.1-1ubuntu0.5","2:22.1.1-1ubuntu0.6","2:22.1.1-1ubuntu0.7"],"ecosystem_specific":{"binaries":[{"binary_name":"xwayland","binary_version":"2:22.1.1-1ubuntu0.9"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6555-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","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":"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-2023-6377"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2023-6478"}]}}}],"schema_version":"1.7.5"}