{
  "cveId": "CVE-2018-16869",
  "url": "https://patchblox.com/security/cve/CVE-2018-16869",
  "summary": "CVE-2018-16869 is fixed in 3 products on 1 platform, first by libhogweed4 3.4.1-0ubuntu0.18.04.1, released June 9, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libhogweed4: A Bleichenbacher type side-channel based padding oracle attack was found in the way nettle handles endian conversion...",
  "description": "A Bleichenbacher type side-channel based padding oracle attack was found in the way nettle handles endian conversion of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run a process on the same physical core as the victim process, could use this flaw extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.",
  "published": "2018-12-03T06:29:00Z",
  "severity": "Low",
  "epss": 0.01495,
  "epssPercentile": 0.74341,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libhogweed4",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.4.1-0ubuntu0.18.04.1",
      "fix": "libhogweed4 3.4.1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libhogweed4-3.4.1-0ubuntu0.18.04.1",
      "released": "2021-06-09T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnettle6",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.4.1-0ubuntu0.18.04.1",
      "fix": "libnettle6 3.4.1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnettle6-3.4.1-0ubuntu0.18.04.1",
      "released": "2021-06-09T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nettle-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.4.1-0ubuntu0.18.04.1",
      "fix": "nettle-bin 3.4.1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-nettle-bin-3.4.1-0ubuntu0.18.04.1",
      "released": "2021-06-09T17:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}