PYSEC-2024-39

Vulnerability from pysec - Published: 2024-02-24 05:15 - Updated: 2024-02-24 07:19
VLAI?
Details

Versions of the package fastecdsa before 2.3.2 are vulnerable to Use of 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.

Impacted products
Name purl
fastecdsa pkg:pypi/fastecdsa
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "fastecdsa",
        "purl": "pkg:pypi/fastecdsa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "57fc5689c95d649dab7ef60cc99ac64589f01e36"
            }
          ],
          "repo": "https://github.com/AntonKueltz/fastecdsa",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0b1",
        "1.0.1",
        "1.0.1b1",
        "1.0.1b2",
        "1.0.1b3",
        "1.0.2",
        "1.0.3",
        "1.1.0",
        "1.1.1",
        "1.1.2",
        "1.1.3",
        "1.2.1",
        "1.3.1",
        "1.3.2",
        "1.4.1",
        "1.4.2",
        "1.4.3",
        "1.5.1",
        "1.5.2",
        "1.6.1",
        "1.6.2",
        "1.6.3",
        "1.6.4",
        "1.6.5",
        "1.7.0",
        "1.7.1",
        "1.7.2",
        "1.7.3",
        "1.7.4",
        "1.7.5",
        "2.0.0",
        "2.1.0",
        "2.1.1",
        "2.1.2",
        "2.1.3",
        "2.1.4",
        "2.1.5",
        "2.2.0",
        "2.2.1",
        "2.2.2",
        "2.2.3",
        "2.3.0",
        "2.3.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-21502"
  ],
  "details": "Versions of the package fastecdsa before 2.3.2 are vulnerable to Use of 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": "PYSEC-2024-39",
  "modified": "2024-02-24T07:19:09.418536+00:00",
  "published": "2024-02-24T05:15:00+00:00",
  "references": [
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-PYTHON-FASTECDSA-6262045"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/keltecc/49da037072276f21b005a8337c15db26"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AntonKueltz/fastecdsa/blob/v2.3.1/src/curveMath.c%23L210"
    },
    {
      "type": "FIX",
      "url": "https://github.com/AntonKueltz/fastecdsa/commit/57fc5689c95d649dab7ef60cc99ac64589f01e36"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.