{
  "cveId": "CVE-2018-0739",
  "url": "https://patchblox.com/security/cve/CVE-2018-0739",
  "summary": "CVE-2018-0739 is fixed in 4 products on 1 platform, first by libssl1.0.0 1.0.2n-1ubuntu5, released March 26, 2018. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libssl1.0.0: Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack...",
  "description": "Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).",
  "published": "2018-03-26T17:00:00Z",
  "severity": "Medium",
  "epss": 0.18596,
  "epssPercentile": 0.97271,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libssl1.0.0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.0.2n-1ubuntu5",
      "fix": "libssl1.0.0 1.0.2n-1ubuntu5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libssl1.0.0-1.0.2n-1ubuntu5",
      "released": "2018-03-26T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libssl1.1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.1.0g-2ubuntu3",
      "fix": "libssl1.1 1.1.0g-2ubuntu3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libssl1.1-1.1.0g-2ubuntu3",
      "released": "2018-03-26T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.1.0g-2ubuntu3",
      "fix": "openssl 1.1.0g-2ubuntu3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-openssl-1.1.0g-2ubuntu3",
      "released": "2018-03-26T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl1.0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.0.2n-1ubuntu5",
      "fix": "openssl1.0 1.0.2n-1ubuntu5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-openssl1.0-1.0.2n-1ubuntu5",
      "released": "2018-03-26T17:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T12:40:37Z"
}