USN-5193-1 fixed several vulnerabilities in X.Org. This update provides the corresponding update for Ubuntu 16.04 ESM.
Original advisory details:
Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain inputs. An attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly execute arbitrary code and escalate privileges.
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "binaries": [ { "binary_version": "2:1.19.6-1ubuntu4.1~16.04.6+esm5", "binary_name": "xmir-hwe-16.04" }, { "binary_version": "2:1.19.6-1ubuntu4.1~16.04.6+esm5", "binary_name": "xorg-server-source-hwe-16.04" }, { "binary_version": "2:1.19.6-1ubuntu4.1~16.04.6+esm5", "binary_name": "xserver-xephyr-hwe-16.04" }, { "binary_version": "2:1.19.6-1ubuntu4.1~16.04.6+esm5", "binary_name": "xserver-xorg-core-hwe-16.04" }, { "binary_version": "2:1.19.6-1ubuntu4.1~16.04.6+esm5", "binary_name": "xserver-xorg-dev-hwe-16.04" }, { "binary_version": "2:1.19.6-1ubuntu4.1~16.04.6+esm5", "binary_name": "xserver-xorg-legacy-hwe-16.04" }, { "binary_version": "2:1.19.6-1ubuntu4.1~16.04.6+esm5", "binary_name": "xwayland-hwe-16.04" } ] }
{ "cves_map": { "cves": [ { "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H" }, { "type": "Ubuntu", "score": "medium" } ], "id": "CVE-2021-4008" }, { "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H" }, { "type": "Ubuntu", "score": "medium" } ], "id": "CVE-2021-4009" }, { "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H" }, { "type": "Ubuntu", "score": "medium" } ], "id": "CVE-2021-4011" } ], "ecosystem": "Ubuntu:Pro:16.04:LTS" } }