ubuntu-cve-2023-24626
Vulnerability from osv_ubuntu
Published
2023-04-08 05:15
Modified
2026-01-27 10:52
Summary
Details

socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.

Severity
6.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
6.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "screen",
            "binary_version": "4.1.0~20120320gitdb59704-9ubuntu0.1~esm3"
          }
        ],
        "priority_reason": "Ubuntu does not install screen setuid-root"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "screen",
        "purl": "pkg:deb/ubuntu/screen@4.1.0~20120320gitdb59704-9ubuntu0.1~esm3?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.0~20120320gitdb59704-9ubuntu0.1~esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.0.3-14ubuntu10",
        "4.1.0~20120320gitdb59704-9",
        "4.1.0~20120320gitdb59704-9ubuntu0.1~esm1",
        "4.1.0~20120320gitdb59704-9ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "screen",
            "binary_version": "4.3.1-2ubuntu0.1+esm1"
          }
        ],
        "priority_reason": "Ubuntu does not install screen setuid-root"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "screen",
        "purl": "pkg:deb/ubuntu/screen@4.3.1-2ubuntu0.1+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.1-2ubuntu0.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.1-2",
        "4.3.1-2build1",
        "4.3.1-2ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "screen",
            "binary_version": "4.6.2-1ubuntu1.1+esm1"
          }
        ],
        "priority_reason": "Ubuntu does not install screen setuid-root"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "screen",
        "purl": "pkg:deb/ubuntu/screen@4.6.2-1ubuntu1.1+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.6.2-1ubuntu1.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.6.1-1",
        "4.6.2-1",
        "4.6.2-1ubuntu1",
        "4.6.2-1ubuntu1.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "screen",
            "binary_version": "4.8.0-1ubuntu0.1"
          }
        ],
        "priority_reason": "Ubuntu does not install screen setuid-root"
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "screen",
        "purl": "pkg:deb/ubuntu/screen@4.8.0-1ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.6.2-3build1",
        "4.7.0-1",
        "4.8.0-1",
        "4.8.0-1ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "screen",
            "binary_version": "4.9.0-1ubuntu0.1"
          }
        ],
        "priority_reason": "Ubuntu does not install screen setuid-root"
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "screen",
        "purl": "pkg:deb/ubuntu/screen@4.9.0-1ubuntu0.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9.0-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8.0-6",
        "4.8.0-6build1",
        "4.8.0-7",
        "4.9.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.",
  "id": "UBUNTU-CVE-2023-24626",
  "modified": "2026-01-27T10:52:55Z",
  "published": "2023-04-08T05:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-24626"
    },
    {
      "type": "REPORT",
      "url": "https://savannah.gnu.org/bugs/?63195"
    },
    {
      "type": "REPORT",
      "url": "https://www.exploit-db.com/exploits/51252"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6198-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-24626"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7978-1"
    }
  ],
  "related": [
    "USN-6198-1",
    "USN-7978-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-24626"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.