{"id":"USN-4487-1","summary":"libx11 vulnerabilities","details":"Todd Carson discovered that libx11 incorrectly handled certain memory\noperations. A local attacker could possibly use this issue to escalate\nprivileges. (CVE-2020-14344)\n\nJayden Rivers discovered that libx11 incorrectly handled locales. A local\nattacker could possibly use this issue to escalate privileges.\n(CVE-2020-14363)\n","modified":"2026-04-22T10:07:01.918652Z","published":"2020-09-02T13:05:00Z","related":["UBUNTU-CVE-2020-14344","UBUNTU-CVE-2020-14363"],"upstream":["CVE-2020-14344","CVE-2020-14363","UBUNTU-CVE-2020-14344","UBUNTU-CVE-2020-14363"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4487-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-14344"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-14363"}],"affected":[{"package":{"name":"libx11","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.3-1ubuntu2.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.3-1ubuntu2.2"}]}],"versions":["2:1.6.3-1ubuntu2","2:1.6.3-1ubuntu2.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.3-1ubuntu2.2"},{"binary_name":"libx11-data","binary_version":"2:1.6.3-1ubuntu2.2"},{"binary_version":"2:1.6.3-1ubuntu2.2","binary_name":"libx11-xcb1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-14344"},{"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-2020-14363"}],"ecosystem":"Ubuntu:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4487-1.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.4-3ubuntu0.3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.4-3ubuntu0.3"}]}],"versions":["2:1.6.4-3","2:1.6.4-3ubuntu0.1","2:1.6.4-3ubuntu0.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.4-3ubuntu0.3"},{"binary_name":"libx11-data","binary_version":"2:1.6.4-3ubuntu0.3"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.4-3ubuntu0.3"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2020-14344","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2020-14363","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"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"}]}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4487-1.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.9-2ubuntu1.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.9-2ubuntu1.1"}]}],"versions":["2:1.6.8-1","2:1.6.9-2","2:1.6.9-2ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.9-2ubuntu1.1"},{"binary_name":"libx11-data","binary_version":"2:1.6.9-2ubuntu1.1"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.9-2ubuntu1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4487-1.json","cves_map":{"cves":[{"id":"CVE-2020-14344","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"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-2020-14363"}],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.5"}