{
  "cveId": "CVE-2018-12437",
  "url": "https://patchblox.com/security/cve/CVE-2018-12437",
  "summary": "CVE-2018-12437 is fixed in libtomcrypt1 on 1 platform by libtomcrypt1 1.18.1-1ubuntu0.1 (version 1.18.1-1ubuntu0.1), released June 14, 2018. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libtomcrypt1: LibTomCrypt through 1.18.1 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidde...",
  "description": "LibTomCrypt through 1.18.1 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.",
  "published": "2018-06-14T19:29:00Z",
  "severity": "Medium",
  "epss": 0.00536,
  "epssPercentile": 0.45368,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libtomcrypt1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.18.1-1ubuntu0.1",
      "fix": "libtomcrypt1 1.18.1-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libtomcrypt1-1.18.1-1ubuntu0.1",
      "released": "2018-06-14T19:29:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T12:40:37Z"
}