{
  "cveId": "CVE-2022-21716",
  "url": "https://patchblox.com/security/cve/CVE-2022-21716",
  "summary": "CVE-2022-21716 is fixed in 14 products on 1 platform, first by python-twisted 17.9.0-2ubuntu0.3, released March 3, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "twisted: Twisted is an event-based framework for internet applications, supporting Python 3.6\u002B",
  "description": "Twisted is an event-based framework for internet applications, supporting Python 3.6\u002B. 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 \u0060nc -rv localhost 22 \u003C /dev/zero\u0060. A patch is available in version 22.2.0. There are currently no known workarounds.",
  "published": "2022-03-03T13:15:00Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0351,
  "epssPercentile": 0.89273,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-twisted",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-bin 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-bin-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-conch",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:17.9.0-2ubuntu0.3",
      "fix": "python-twisted-conch 1:17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-conch-1-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-core",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-core 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-core-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-mail",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-mail 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-mail-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-names",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-names 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-names-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-news",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-news 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-news-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-runner",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-runner 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-runner-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-web",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-web 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-web-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-twisted-words",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python-twisted-words 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-twisted-words-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-twisted",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python3-twisted 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-twisted-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-twisted",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "18.9.0-11ubuntu0.20.04.2",
      "fix": "python3-twisted 18.9.0-11ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-twisted-18.9.0-11ubuntu0.20.04.2",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-twisted",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "22.1.0-2ubuntu2.1",
      "fix": "python3-twisted 22.1.0-2ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-twisted-22.1.0-2ubuntu2.1",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-twisted",
      "release": "amzn 2023",
      "fixedVersion": "22.4.0-124.amzn2023.0.2",
      "fix": "ALAS2023-2023-056",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-056",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-twisted\u002Btls",
      "release": "amzn 2023",
      "fixedVersion": "22.4.0-124.amzn2023.0.2",
      "fix": "ALAS2023-2023-056",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-056",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-twisted-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "17.9.0-2ubuntu0.3",
      "fix": "python3-twisted-bin 17.9.0-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-twisted-bin-17.9.0-2ubuntu0.3",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-twisted-bin",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "18.9.0-11ubuntu0.20.04.2",
      "fix": "python3-twisted-bin 18.9.0-11ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-twisted-bin-18.9.0-11ubuntu0.20.04.2",
      "released": "2022-03-03T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "twisted",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "22.2.0-1",
      "fix": "DEBIAN-CVE-2022-21716",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-21716",
      "released": "2022-03-03T21:15:07Z"
    },
    {
      "platform": "linux",
      "product": "twisted",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "22.2.0-1",
      "fix": "DEBIAN-CVE-2022-21716",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-21716",
      "released": "2022-03-03T21:15:07Z"
    },
    {
      "platform": "linux",
      "product": "twisted",
      "release": "Debian 14",
      "fixedVersion": "22.2.0-1",
      "fix": "DEBIAN-CVE-2022-21716",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-21716",
      "released": "2022-03-03T21:15:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}