usn-5193-1
Vulnerability from osv_ubuntu
Published
2021-12-14 18:13
Modified
2026-04-22 07:37
Summary
xorg-server, xorg-server-hwe-18.04, xwayland vulnerabilities
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.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-4008",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4009",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4010",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4011",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "xdmx",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xdmx-tools",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xmir",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xnest",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xorg-server-source",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xserver-common",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xserver-xephyr",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xserver-xorg-core",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xserver-xorg-legacy",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xserver-xorg-xmir",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xvfb",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          },
          {
            "binary_name": "xwayland",
            "binary_version": "2:1.19.6-1ubuntu4.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "xorg-server",
        "purl": "pkg:deb/ubuntu/xorg-server@2:1.19.6-1ubuntu4.10?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.19.6-1ubuntu4.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:1.19.5-0ubuntu2",
        "2:1.19.6-1ubuntu1",
        "2:1.19.6-1ubuntu2",
        "2:1.19.6-1ubuntu3",
        "2:1.19.6-1ubuntu4",
        "2:1.19.6-1ubuntu4.1",
        "2:1.19.6-1ubuntu4.2",
        "2:1.19.6-1ubuntu4.3",
        "2:1.19.6-1ubuntu4.4",
        "2:1.19.6-1ubuntu4.5",
        "2:1.19.6-1ubuntu4.6",
        "2:1.19.6-1ubuntu4.7",
        "2:1.19.6-1ubuntu4.8",
        "2:1.19.6-1ubuntu4.9"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-4008",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4009",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4010",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4011",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "xorg-server-source-hwe-18.04",
            "binary_version": "2:1.20.8-2ubuntu2.2~18.04.6"
          },
          {
            "binary_name": "xserver-xephyr-hwe-18.04",
            "binary_version": "2:1.20.8-2ubuntu2.2~18.04.6"
          },
          {
            "binary_name": "xserver-xorg-core-hwe-18.04",
            "binary_version": "2:1.20.8-2ubuntu2.2~18.04.6"
          },
          {
            "binary_name": "xserver-xorg-dev-hwe-18.04",
            "binary_version": "2:1.20.8-2ubuntu2.2~18.04.6"
          },
          {
            "binary_name": "xserver-xorg-legacy-hwe-18.04",
            "binary_version": "2:1.20.8-2ubuntu2.2~18.04.6"
          },
          {
            "binary_name": "xwayland-hwe-18.04",
            "binary_version": "2:1.20.8-2ubuntu2.2~18.04.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "xorg-server-hwe-18.04",
        "purl": "pkg:deb/ubuntu/xorg-server-hwe-18.04@2:1.20.8-2ubuntu2.2~18.04.6?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.20.8-2ubuntu2.2~18.04.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:1.20.1-3ubuntu2.1~18.04.1",
        "2:1.20.4-1ubuntu3~18.04.1",
        "2:1.20.5+git20191008-0ubuntu1~18.04.1",
        "2:1.20.8-2ubuntu2.1~18.04.1",
        "2:1.20.8-2ubuntu2.2~18.04.1",
        "2:1.20.8-2ubuntu2.2~18.04.2",
        "2:1.20.8-2ubuntu2.2~18.04.3",
        "2:1.20.8-2ubuntu2.2~18.04.4",
        "2:1.20.8-2ubuntu2.2~18.04.5"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-4008",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4009",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4010",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-4011",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "xdmx",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xdmx-tools",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xnest",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xorg-server-source",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xserver-common",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xserver-xephyr",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xserver-xorg-core",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xserver-xorg-legacy",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xvfb",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          },
          {
            "binary_name": "xwayland",
            "binary_version": "2:1.20.13-1ubuntu1~20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "xorg-server",
        "purl": "pkg:deb/ubuntu/xorg-server@2:1.20.13-1ubuntu1~20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.20.13-1ubuntu1~20.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    }
  ],
  "aliases": [],
  "details": "Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled\ncertain inputs. An attacker could use this issue to cause the server to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode and escalate privileges.\n",
  "id": "USN-5193-1",
  "modified": "2026-04-22T07:37:00Z",
  "published": "2021-12-14T18:13:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5193-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-4008"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-4009"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-4010"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-4011"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "xorg-server, xorg-server-hwe-18.04, xwayland vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-4008",
    "UBUNTU-CVE-2021-4009",
    "UBUNTU-CVE-2021-4010",
    "UBUNTU-CVE-2021-4011"
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.