{
  "cveId": "CVE-2020-4067",
  "url": "https://patchblox.com/security/cve/CVE-2020-4067",
  "summary": "CVE-2020-4067 is fixed in coturn on 1 platform, first by coturn 4.5.0.7-1ubuntu2.18.04.2, released June 29, 2020. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "coturn: In coturn before version 4.5.1.3, there is an issue whereby STUN/TURN response buffer is not initialized properly",
  "description": "In coturn before version 4.5.1.3, there is an issue whereby STUN/TURN response buffer is not initialized properly. There is a leak of information between different client connections. One client (an attacker) could use their connection to intelligently query coturn to get interesting bytes in the padding bytes from the connection of another client. This has been fixed in 4.5.1.3.",
  "published": "2020-06-29T13:15:00Z",
  "severity": "Medium",
  "epss": 0.01898,
  "epssPercentile": 0.79785,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "coturn",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.5.0.7-1ubuntu2.18.04.2",
      "fix": "coturn 4.5.0.7-1ubuntu2.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-coturn-4.5.0.7-1ubuntu2.18.04.2",
      "released": "2020-06-29T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "coturn",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.5.1.1-1.1ubuntu0.20.04.1",
      "fix": "coturn 4.5.1.1-1.1ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-coturn-4.5.1.1-1.1ubuntu0.20.04.1",
      "released": "2020-06-29T13:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}