hsec-2024-0009
Vulnerability from osv_haskell
Published
2025-11-14 14:45
Modified
2025-11-14 14:45
Summary
Public key confusion in third-party blocks
Details

Public key confusion in third-party blocks

Third-party blocks can be generated without transferring the whole token to the third-party authority. Instead, a ThirdPartyBlock request can be sent, providing only the necessary info to generate a third-party block and to sign it:

  • the public key of the previous block (used in the signature);
  • the public keys part of the token symbol table (for public key interning in datalog expressions).

A third-party block request forged by a malicious user can trick the third-party authority into generating datalog trusting the wrong keypair.

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "human_link": "https://github.com/haskell/security-advisories/tree/main/advisories/published/2024/HSEC-2024-0009.md",
        "osv": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export/2024/HSEC-2024-0009.json"
      },
      "package": {
        "ecosystem": "Hackage",
        "name": "biscuit-haskell"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.3.0.0"
            },
            {
              "fixed": "0.4.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-41949",
    "GHSA-rgqv-mwc3-c78m",
    "GHSA-47cq-pc2v-3rmp"
  ],
  "database_specific": {
    "home": "https://github.com/haskell/security-advisories",
    "osvs": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export",
    "repository": "https://github.com/haskell/security-advisories"
  },
  "details": "# Public key confusion in third-party blocks\n\nThird-party blocks can be generated without transferring the whole token to the third-party authority. Instead, a `ThirdPartyBlock` request can be sent, providing only the necessary info to generate a third-party block and to sign it:\n\n- the public key of the previous block (used in the signature);\n- the public keys part of the token symbol table (for public key interning in datalog expressions).\n\nA third-party block request forged by a malicious user can trick the third-party authority into generating datalog trusting the wrong keypair.\n",
  "id": "HSEC-2024-0009",
  "modified": "2025-11-14T14:45:34Z",
  "published": "2025-11-14T14:45:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/biscuit-auth/biscuit-haskell/security/advisories/GHSA-47cq-pc2v-3rmp"
    },
    {
      "type": "FIX",
      "url": "https://github.com/biscuit-auth/biscuit-haskell/pull/93"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Public key confusion in third-party blocks"
}


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