{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "wolfssl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "wolfssl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.7.2-0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Generating the ECDSA nonce k samples a random number r and then  truncates this randomness with a modular reduction mod n where n is the  order of the elliptic curve. Meaning k = r mod n. The division used  during the reduction estimates a factor q_e by dividing the upper two  digits (a digit having e.g. a size of 8 byte) of r by the upper digit of  n and then decrements q_e in a loop until it has the correct size.  Observing the number of times q_e is decremented through a control-flow  revealing side-channel reveals a bias in the most significant bits of  k. Depending on the curve this is either a negligible bias or a  significant bias large enough to reconstruct k with lattice reduction  methods. For SECP160R1, e.g., we find a bias of 15 bits.",
  "id": "DEBIAN-CVE-2024-1544",
  "modified": "2026-09-15T08:47:48.310648902Z",
  "published": "2024-08-27T19:15:16.547Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2024-1544"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2024-1544"
  ]
}