{"id":"USN-6407-1","summary":"libx11 vulnerabilities","details":"Gregory James Duck discovered that libx11 incorrectly handled certain\nkeyboard symbols. If a user were tricked into connecting to a malicious X\nserver, a remote attacker could use this issue to cause libx11 to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2023-43785)\n\nYair Mizrahi discovered that libx11 incorrectly handled certain malformed\nXPM image files. If a user were tricked into opening a specially crafted\nXPM image file, a remote attacker could possibly use this issue to consume\nmemory, leading to a denial of service. (CVE-2023-43786)\n\nYair Mizrahi discovered that libx11 incorrectly handled certain malformed\nXPM image files. If a user were tricked into opening a specially crafted\nXPM image file, a remote attacker could use this issue to cause libx11 to\ncrash, leading to a denial of service, or possibly execute arbitrary code.\n(CVE-2023-43787)\n","modified":"2026-04-27T17:02:15.003669623Z","published":"2023-10-03T16:57:57Z","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-6407-1"},{"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:20.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.9-2ubuntu1.6?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.9-2ubuntu1.6"}]}],"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"],"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"}],"availability":"No subscription required"},"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":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"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:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6407-1.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"},{"fixed":"2:1.7.5-1ubuntu0.3"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","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":{"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"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2023-43786"},{"id":"CVE-2023-43787","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6407-1.json"}}],"schema_version":"1.7.5"}