{
  "cveId": "CVE-2020-8794",
  "url": "https://patchblox.com/security/cve/CVE-2020-8794",
  "summary": "CVE-2020-8794 is fixed in opensmtpd on 1 platform, first by opensmtpd 6.0.3p1-1ubuntu0.2, released February 25, 2020. It is not reported as exploited. Patch Radar priority: High.",
  "title": "opensmtpd: OpenSMTPD before 6.6.4 allows remote code execution because of anout-of-bounds read in mta_io in mta_session.c for mu...",
  "description": "OpenSMTPD before 6.6.4 allows remote code execution because of anout-of-bounds read in mta_io in mta_session.c for multi-line replies.Although this vulnerability affects the client side of OpenSMTPD, it ispossible to attack a server because the server code launches the clientcode during bounce handling.",
  "published": "2020-02-25T09:15:00Z",
  "severity": "High",
  "epss": 0.889,
  "epssPercentile": 0.99779,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "opensmtpd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "6.0.3p1-1ubuntu0.2",
      "fix": "opensmtpd 6.0.3p1-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-opensmtpd-6.0.3p1-1ubuntu0.2",
      "released": "2020-02-25T09:15:00Z"
    },
    {
      "platform": "linux",
      "product": "opensmtpd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.6.4p1-1",
      "fix": "opensmtpd 6.6.4p1-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-opensmtpd-6.6.4p1-1",
      "released": "2020-02-25T09:15:00Z"
    },
    {
      "platform": "linux",
      "product": "opensmtpd",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "6.6.4p1-1",
      "fix": "opensmtpd 6.6.4p1-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-opensmtpd-6.6.4p1-1",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "opensmtpd",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "6.6.4p1-1",
      "fix": "opensmtpd 6.6.4p1-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-opensmtpd-6.6.4p1-1",
      "released": "2026-01-16T01:42:24Z"
    }
  ],
  "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"
  }
}