{"id":"USN-6407-2","summary":"libx11 vulnerabilities","details":"USN-6407-1 fixed several vulnerabilities in libx11. This update provides\nthe corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.\n\nOriginal advisory details:\n\n Gregory James Duck discovered that libx11 incorrectly handled certain\n keyboard symbols. If a user were tricked into connecting to a malicious X\n server, a remote attacker could use this issue to cause libx11 to crash,\n resulting in a denial of service, or possibly execute arbitrary code.\n (CVE-2023-43785)\n\n Yair Mizrahi discovered that libx11 incorrectly handled certain malformed\n XPM image files. If a user were tricked into opening a specially crafted\n XPM image file, a remote attacker could possibly use this issue to consume\n memory, leading to a denial of service. (CVE-2023-43786)\n\n Yair Mizrahi discovered that libx11 incorrectly handled certain malformed\n XPM image files. If a user were tricked into opening a specially crafted\n XPM image file, a remote attacker could use this issue to cause libx11 to\n crash, leading to a denial of service, or possibly execute arbitrary code.\n (CVE-2023-43787)\n","modified":"2026-04-27T17:02:15.623343036Z","published":"2023-10-10T14:35:08Z","related":["UBUNTU-CVE-2023-43785","UBUNTU-CVE-2023-43786","UBUNTU-CVE-2023-43787"],"upstream":["CVE-2023-43785","CVE-2023-43786","CVE-2023-43787","UBUNTU-CVE-2023-43785","UBUNTU-CVE-2023-43786","UBUNTU-CVE-2023-43787"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6407-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-43785"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-43786"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-43787"}],"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=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.2-1ubuntu2.1+esm5"}]}],"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"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","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":{"cves_map":{"cves":[{"id":"CVE-2023-43785","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-43786","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-43787","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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"}]}],"ecosystem":"Ubuntu:Pro:14.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6407-2.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"},{"fixed":"2:1.6.3-1ubuntu2.2+esm4"}]}],"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"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","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":{"cves_map":{"cves":[{"id":"CVE-2023-43785","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-43786","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-43787","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6407-2.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"},{"fixed":"2:1.6.4-3ubuntu0.4+esm2"}]}],"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"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","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":{"cves_map":{"cves":[{"id":"CVE-2023-43785","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-43786","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-43787","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6407-2.json"}}],"schema_version":"1.7.5"}