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CVE-2026-8721

Estado: AplazadaCrítica (9.8)—

Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs.

Password parameters in PKCS12.xs are declared char *, which routes through Perl's default typemap to SvPV_nolen. The Perl length is discarded.

The C code (or OpenSSL internally) calls strlen() on the buffer. Any password byte at or after the first NULL is silently dropped. Binary / KDF-derived / HMAC-derived passwords lose entropy without any warnings.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad remota (AV:N, PR:N, UI:N) en biblioteca PKCS12 de Perl expuesta en red. Impacto: truncado de contraseñas debilita credenciales de certificados/claves, facilitando acceso a datos cifrados.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Application Isolation and SandboxingExploit ProtectionUpdate SoftwareApplication Developer GuidanceVulnerability ScanningThreat Intelligence Program

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Crypt Openssl Pkcs12 Project — Crypt Openssl Pkcs12AI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-8721",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-8721",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-18T12:56:25.907387Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/dsully/perl-crypt-openssl-pkcs12",
          "vendor": "JONASBN",
          "product": "Crypt::OpenSSL::PKCS12",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "1.94"
            }
          ],
          "packageName": "Crypt-OpenSSL-PKCS12",
          "programFiles": [
            "PKCS12.xs"
          ],
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "Crypt::OpenSSL::PKCS12::mac_ok"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::changepass"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::create"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::create_as_string"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::certificate"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::ca_certificate"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::private_key"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::info_as_hash"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::info"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-17T19:16:25.310",
  "references": [
    {
      "url": "https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.95/view/Changes.md",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/05/17/6",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
        {
          "lang": "en",
          "value": "CWE-170"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs.\n\nPassword parameters in PKCS12.xs are declared char *, which routes through Perl's default typemap to SvPV_nolen.  The Perl length is discarded.\n\nThe C code (or OpenSSL internally) calls strlen() on the buffer.  Any password byte at or after the first NULL is silently dropped. Binary / KDF-derived / HMAC-derived passwords lose entropy without any warnings."
    }
  ],
  "lastModified": "2026-06-17T11:04:19.683",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}