{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pypqc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.4"
            },
            {
              "last_affected": "0.0.6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-385",
      "CWE-733"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-06-05T16:56:35Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n`kyber512`, `kyber768`, and `kyber1024` on Mac OS \\(or when compiled with clang\\) only: An attacker able to submit many decapsulation requests against a single private key, and to gain timing information about the decapsulation, could recover the private key. Proof-of-concept exploit exists for a local attacker.\n\nCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:P/RL:U/RC:C  \n\n### Patches\nNo patch is currently available / pending upstream [PQClean#556](https://github.com/PQClean/PQClean/issues/556).\n\n### Workarounds\nNo workarounds have been reported. The 0.0.7 -\u003e 0.0.7.1 upgrade, when available, should be a drop-in replacement\u003c!--; it has no known breaking changes--\u003e.\n\n### References\n\nhttps://pqshield.com/pqshield-plugs-timing-leaks-in-kyber-ml-kem-to-improve-pqc-implementation-maturity/\n\nhttps://github.com/antoonpurnal/clangover\n\nhttps://www.github.com/PQClean/PQClean/issues/556\n\nhttps://www.github.com/pq-crystals/kyber/commit/9b8d30698a3e7449aeb34e62339d4176f11e3c6c",
  "id": "GHSA-hvh4-5qr6-3v7r",
  "modified": "2024-06-05T18:36:15Z",
  "published": "2024-06-05T16:56:35Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/JamesTheAwesomeDude/pypqc/security/advisories/GHSA-hvh4-5qr6-3v7r"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PQClean/PQClean/issues/556"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/JamesTheAwesomeDude/pypqc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:P/RL:U/RC:C",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Observable Timing Discrepancy in pypqc"
}