usn-6407-2
Vulnerability from osv_ubuntu
Published
2023-10-10 14:35
Modified
2026-06-29 10:53
Summary
libx11 vulnerabilities
Details

USN-6407-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Gregory James Duck discovered that libx11 incorrectly handled certain keyboard symbols. If a user were tricked into connecting to a malicious X server, a remote attacker could use this issue to cause libx11 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-43785)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could possibly use this issue to consume memory, leading to a denial of service. (CVE-2023-43786)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could use this issue to cause libx11 to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2023-43787)

References
To clipboard 

{
  "affected": [
    {
      "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"
        }
      },
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "libx11",
        "purl": "pkg:deb/ubuntu/libx11@2:1.6.2-1ubuntu2.1+esm5?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.6.2-1ubuntu2.1+esm5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "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"
        }
      },
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libx11",
        "purl": "pkg:deb/ubuntu/libx11@2:1.6.3-1ubuntu2.2+esm4?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.6.3-1ubuntu2.2+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "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"
        }
      },
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "libx11",
        "purl": "pkg:deb/ubuntu/libx11@2:1.6.4-3ubuntu0.4+esm2?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.6.4-3ubuntu0.4+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    }
  ],
  "aliases": [],
  "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",
  "id": "USN-6407-2",
  "modified": "2026-06-29T10:53:04Z",
  "published": "2023-10-10T14:35:08Z",
  "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"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libx11 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2023-43785",
    "UBUNTU-CVE-2023-43786",
    "UBUNTU-CVE-2023-43787"
  ]
}



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