usn-6407-1
Vulnerability from osv_ubuntu
Published
2023-10-03 16:57
Modified
2026-04-27 14:11
Summary
libx11 vulnerabilities
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:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libx11",
        "purl": "pkg:deb/ubuntu/libx11@2:1.6.9-2ubuntu1.6?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.6.9-2ubuntu1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "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:22.04:LTS"
        }
      },
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libx11",
        "purl": "pkg:deb/ubuntu/libx11@2:1.7.5-1ubuntu0.3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:1.7.5-1ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    }
  ],
  "aliases": [],
  "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",
  "id": "USN-6407-1",
  "modified": "2026-04-27T14:11:31Z",
  "published": "2023-10-03T16:57:57Z",
  "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"
    }
  ],
  "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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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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 confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.