ubuntu-cve-2022-21716
Vulnerability from osv_ubuntu
Published
2022-03-03 21:15
Modified
2025-09-08 16:49
Summary
Details

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as nc -rv localhost 22 < /dev/zero. A patch is available in version 22.2.0. There are currently no known workarounds.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-twisted",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-bin",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-conch",
            "binary_version": "1:13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-core",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-lore",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-mail",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-names",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-news",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-runner",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-web",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "python-twisted-words",
            "binary_version": "13.2.0-1ubuntu1.2+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "twisted",
        "purl": "pkg:deb/ubuntu/twisted@13.2.0-1ubuntu1.2+esm2?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "13.2.0-1ubuntu1.2+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "13.0.0-1ubuntu1",
        "13.2.0-1ubuntu1",
        "13.2.0-1ubuntu1.2",
        "13.2.0-1ubuntu1.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-twisted",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-bin",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-conch",
            "binary_version": "1:16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-core",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-mail",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-names",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-news",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-runner",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-web",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python-twisted-words",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          },
          {
            "binary_name": "python3-twisted",
            "binary_version": "16.0.0-1ubuntu0.4+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "twisted",
        "purl": "pkg:deb/ubuntu/twisted@16.0.0-1ubuntu0.4+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.0.0-1ubuntu0.4+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "15.2.1-1ubuntu2",
        "15.5.0-1",
        "15.5.0-2",
        "15.5.0-2ubuntu1",
        "15.5.0-4",
        "16.0.0~pre1-1",
        "16.0.0~pre1-1ubuntu1",
        "16.0.0~pre1-2ubuntu1",
        "16.0.0~pre1-3",
        "16.0.0-1",
        "16.0.0-1ubuntu0.2",
        "16.0.0-1ubuntu0.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python-twisted",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-bin",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-conch",
            "binary_version": "1:17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-core",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-mail",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-names",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-news",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-runner",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-web",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python-twisted-words",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python3-twisted",
            "binary_version": "17.9.0-2ubuntu0.3"
          },
          {
            "binary_name": "python3-twisted-bin",
            "binary_version": "17.9.0-2ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "twisted",
        "purl": "pkg:deb/ubuntu/twisted@17.9.0-2ubuntu0.3?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "17.9.0-2ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "16.6.0-2ubuntu3",
        "17.9.0-1",
        "17.9.0-2",
        "17.9.0-2ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-twisted",
            "binary_version": "18.9.0-11ubuntu0.20.04.2"
          },
          {
            "binary_name": "python3-twisted-bin",
            "binary_version": "18.9.0-11ubuntu0.20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "twisted",
        "purl": "pkg:deb/ubuntu/twisted@18.9.0-11ubuntu0.20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "18.9.0-11ubuntu0.20.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "18.9.0-3ubuntu1",
        "18.9.0-5",
        "18.9.0-6",
        "18.9.0-6build1",
        "18.9.0-6ubuntu1",
        "18.9.0-8",
        "18.9.0-11",
        "18.9.0-11ubuntu0.20.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-twisted",
            "binary_version": "22.1.0-2ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "twisted",
        "purl": "pkg:deb/ubuntu/twisted@22.1.0-2ubuntu2.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "22.1.0-2ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.3.0-7ubuntu1",
        "20.3.0-7ubuntu3",
        "22.1.0-2ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer\u0027s SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 \u003c /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds.",
  "id": "UBUNTU-CVE-2022-21716",
  "modified": "2025-09-08T16:49:59Z",
  "published": "2022-03-03T21:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-21716"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx"
    },
    {
      "type": "REPORT",
      "url": "https://twistedmatrix.com/trac/ticket/10284"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/twisted/twisted/releases/tag/twisted-22.2.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5354-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5354-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2022-21716"
    }
  ],
  "related": [
    "USN-5354-1",
    "USN-5354-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2022-21716"
  ]
}



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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

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.