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CVE-2023-49087

Estado: ModificadaAlta (7.5)—

xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by exploiting a bug in PHP's canonicalization function) manages to manipulate the canonicalized version's DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13.

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).

Tecnologías afectadas (2)

Simplesamlphp — Saml2Simplesamlphp — Xml-security

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-49087",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 2.2
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "simplesamlphp",
          "product": "xml-security",
          "versions": [
            {
              "status": "affected",
              "version": "= 1.6.11"
            },
            {
              "status": "affected",
              "version": "= 5.0.0-alpha.12"
            }
          ]
        }
      ]
    }
  ],
  "published": "2023-11-30T06:15:47.173",
  "references": [
    {
      "url": "https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581",
      "tags": [
        "Patch"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by exploiting a bug in PHP's canonicalization function) manages to manipulate the canonicalized version's DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13."
    },
    {
      "lang": "es",
      "value": "xml-security es una librería que implementa cifrado y firmas XML. La validación de una firma XML requiere verificar que el valor hash del documento XML relacionado coincida con un valor DigestValue específico, pero también que la firma criptográfica en el árbol SignedInfo (el que contiene el DigestValue) verifique y coincida con una clave pública confiable. Si un atacante de alguna manera (es decir, explotando un error en la función de canonicalización de PHP) logra manipular el DigestValue de la versión canonicalizada, sería posible falsificar la firma. Este problema se solucionó en las versiones 1.6.12 y 5.0.0-alpha.13."
    }
  ],
  "lastModified": "2026-06-17T06:35:20.330",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:simplesamlphp:saml2:5.0.0:alpha12:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "96D08664-7238-4C52-B40E-F32E304DE2D3"
            },
            {
              "criteria": "cpe:2.3:a:simplesamlphp:xml-security:1.6.11:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3F1375D1-EBBE-4AD5-8271-457C64C948BD"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}