GHSA-PH86-G9R3-5QW4

Vulnerability from github – Published: 2024-02-24 06:30 – Updated: 2025-02-12 21:59
VLAI?
Summary
Uninitialized Variable in fastecdsa
Details

Versions of the package fastecdsa before 2.3.2 use an Uninitialized Variable on the stack, via the curvemath_mul function in src/curveMath.c, due to being used and interpreted as user-defined type. Depending on the variable's actual value it could be arbitrary free(), arbitrary realloc(), null pointer dereference and other. Since the stack can be controlled by the attacker, the vulnerability could be used to corrupt allocator structure, leading to possible heap exploitation. The attacker could cause denial of service by exploiting this vulnerability.

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "fastecdsa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-21502"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457",
      "CWE-908"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-02-12T21:59:29Z",
    "nvd_published_at": "2024-02-24T05:15:44Z",
    "severity": "HIGH"
  },
  "details": "Versions of the package fastecdsa before 2.3.2 use an Uninitialized Variable on the stack, via the curvemath_mul function in src/curveMath.c, due to being used and interpreted as user-defined type. Depending on the variable\u0027s actual value it could be arbitrary free(), arbitrary realloc(), null pointer dereference and other. Since the stack can be controlled by the attacker, the vulnerability could be used to corrupt allocator structure, leading to possible heap exploitation. The attacker could cause denial of service by exploiting this vulnerability.",
  "id": "GHSA-ph86-g9r3-5qw4",
  "modified": "2025-02-12T21:59:29Z",
  "published": "2024-02-24T06:30:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21502"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AntonKueltz/fastecdsa/commit/57fc5689c95d649dab7ef60cc99ac64589f01e36"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/keltecc/49da037072276f21b005a8337c15db26"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/AntonKueltz/fastecdsa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AntonKueltz/fastecdsa/blob/v2.3.1/src/curveMath.c%23L210"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-PYTHON-FASTECDSA-6262045"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Uninitialized Variable in fastecdsa"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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