OAuth library for nim allows insecure generation of state values by generateState - entropy too low and uses regular PRNG instead of CSPRNG

{
  "id": "4fc2a0d001184278807e74023c76a8fda28e0f17e7d33d603ab5aa8fe112c978",
  "url": "https://osv.dev/vulnerability/CVE-2024-42475",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OAuth library for nim allows insecure generation of state values by generateState - entropy too low and uses regular PRNG instead of CSPRNG",
    "summary": "In the OAuth library for nim prior to version 0.11, the `state` values generated by the `generateState` function do not have sufficient entropy. These can be successfully guessed by an attacker allowing them to perform a CSRF vs a user, associating the user's session with the attacker's protected resources. While `state` isn't exactly a cryptographic value, it should be generated in a cryptographically secure way. `generateState` should be using a CSPRNG. Version 0.11 modifies the `generateState` function to generate `state` values of at least 128 bits of entropy while using a CSPRNG.",
    "evidence": "osv:CVE-2024-42475",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-42475",
      "aliases": [
        "CVE-2024-42475",
        "GHSA-332c-q46h-fg8f"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cordea/oauth",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ec2e058fc46f04deaf3cb55eca32b3b83c614953"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.11"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.11"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.10",
            "v0.9",
            "v0.8",
            "v0.7",
            "v0.6",
            "v0.5",
            "v0.4.1",
            "v0.4",
            "v0.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42475.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.649980397Z",
      "provider": "osv",
      "references": [
        "https://github.com/CORDEA/oauth/blob/b8c163b0d9cfad6d29ce8c1fb394e5f47182ee1c/src/oauth2.nim#L179",
        "https://github.com/CORDEA/oauth/security/advisories/GHSA-332c-q46h-fg8f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42475.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-42475"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-330",
          "CWE-352"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42475.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-42475",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504704,
  "published_at": "2024-08-15T18:40:49.75+00:00"
}