{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D890677F-5379-4587-B8E7-D38B02AD525A",
              "versionEndExcluding": "0.27.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, sc_compacttlv_find_tag searches a compact-TLV buffer for a given tag. In compact-TLV, a single byte encodes the tag (high nibble) and value length (low nibble). With a 1-byte buffer {0x0A}, the encoded element claims tag=0 and length=10 but no value bytes follow. Calling sc_compacttlv_find_tag with search tag 0x00 returns a pointer equal to buf+1 and outlen=10 without verifying that the claimed value length fits within the remaining buffer. In cases where the sc_compacttlv_find_tag is provided untrusted data (such as being read from cards/files), attackers may be able to influence it to return out-of-bounds pointers leading to downstream memory corruption when subsequent code tries to dereference the pointer. This issue has been patched in version 0.27.0."
    },
    {
      "lang": "es",
      "value": "OpenSC es un conjunto de herramientas y middleware de c\u00f3digo abierto para tarjetas inteligentes. Antes de la versi\u00f3n 0.27.0, sc_compacttlv_find_tag busca una etiqueta dada en un b\u00fafer compact-TLV. En compact-TLV, un solo byte codifica la etiqueta (nibble superior) y la longitud del valor (nibble inferior). Con un b\u00fafer de 1 byte {0x0A}, el elemento codificado declara etiqueta=0 y longitud=10 pero no le siguen bytes de valor. Llamar a sc_compacttlv_find_tag con la etiqueta de b\u00fasqueda 0x00 devuelve un puntero igual a buf+1 y outlen=10 sin verificar que la longitud de valor declarada cabe dentro del b\u00fafer restante. En los casos en que a sc_compacttlv_find_tag se le proporcionan datos no confiables (como los le\u00eddos de tarjetas/archivos), los atacantes pueden influir en ella para que devuelva punteros fuera de los l\u00edmites, lo que lleva a una corrupci\u00f3n de memoria posterior cuando el c\u00f3digo subsiguiente intenta desreferenciar el puntero. Este problema ha sido corregido en la versi\u00f3n 0.27.0."
    }
  ],
  "id": "CVE-2025-66038",
  "lastModified": "2026-04-01T17:40:36.183",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "PHYSICAL",
          "availabilityImpact": "LOW",
          "baseScore": 3.9,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 0.5,
        "impactScore": 3.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "PHYSICAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-30T18:16:18.177",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/OpenSC/OpenSC/commit/6db171bcb6fd7cb3b51098fefbb3b28e44f0a79c"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/OpenSC/OpenSC/security/advisories/GHSA-72x5-fwjx-2459"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66038"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-126"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}