{
  "cveId": "CVE-2020-12783",
  "url": "https://patchblox.com/security/cve/CVE-2020-12783",
  "summary": "CVE-2020-12783 is fixed in 6 products on 1 platform, first by exim4 4.90.1-1ubuntu1.5, released May 11, 2020. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "exim4: Exim through 4.93 has an out-of-bounds read in the SPA authenticator that could result in SPA/NTLM authentication byp...",
  "description": "Exim through 4.93 has an out-of-bounds read in the SPA authenticator that could result in SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c.",
  "published": "2020-05-11T07:15:00Z",
  "severity": "Medium",
  "epss": 0.04553,
  "epssPercentile": 0.91645,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "exim4",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.90.1-1ubuntu1.5",
      "fix": "exim4 4.90.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-exim4-4.90.1-1ubuntu1.5",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.93-13ubuntu1.1",
      "fix": "exim4 4.93-13ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-exim4-4.93-13ubuntu1.1",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-base",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.90.1-1ubuntu1.5",
      "fix": "exim4-base 4.90.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-exim4-base-4.90.1-1ubuntu1.5",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-base",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.93-13ubuntu1.1",
      "fix": "exim4-base 4.93-13ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-exim4-base-4.93-13ubuntu1.1",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-config",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.90.1-1ubuntu1.5",
      "fix": "exim4-config 4.90.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-exim4-config-4.90.1-1ubuntu1.5",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-config",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.93-13ubuntu1.1",
      "fix": "exim4-config 4.93-13ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-exim4-config-4.93-13ubuntu1.1",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-daemon-heavy",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.90.1-1ubuntu1.5",
      "fix": "exim4-daemon-heavy 4.90.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-exim4-daemon-heavy-4.90.1-1ubuntu1.5",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-daemon-heavy",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.93-13ubuntu1.1",
      "fix": "exim4-daemon-heavy 4.93-13ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-exim4-daemon-heavy-4.93-13ubuntu1.1",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-daemon-light",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.90.1-1ubuntu1.5",
      "fix": "exim4-daemon-light 4.90.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-exim4-daemon-light-4.90.1-1ubuntu1.5",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "exim4-daemon-light",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.93-13ubuntu1.1",
      "fix": "exim4-daemon-light 4.93-13ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-exim4-daemon-light-4.93-13ubuntu1.1",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "eximon4",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.90.1-1ubuntu1.5",
      "fix": "eximon4 4.90.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-eximon4-4.90.1-1ubuntu1.5",
      "released": "2020-05-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "eximon4",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.93-13ubuntu1.1",
      "fix": "eximon4 4.93-13ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-eximon4-4.93-13ubuntu1.1",
      "released": "2020-05-11T07:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}