« Volver al listado

CVE-2018-5241

Estado: ModificadaCrítica (9.8)—

Symantec Advanced Secure Gateway (ASG) 6.6 and 6.7, and ProxySG 6.5, 6.6, and 6.7 are susceptible to a SAML authentication bypass vulnerability. The products can be configured with a SAML authentication realm to authenticate network users in intercepted proxy traffic. When parsing SAML responses, ASG and ProxySG incorrectly handle XML nodes with comments. A remote attacker can modify a valid SAML response without invalidating its cryptographic signature. This may allow the attacker to bypass user authentication security controls in ASG and ProxySG. This vulnerability only affects authentication of network users in intercepted traffic. It does not affect administrator user authentication for the ASG and ProxySG management consoles.

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)

Broadcom — Advanced Secure GatewayBroadcom — Symantec Proxysg

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2018-5241",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/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": "secure@symantec.com",
      "affectedData": [
        {
          "vendor": "Symantec Corporation",
          "product": "Advanced Secure Gateway (ASG)",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "status": "affected",
              "version": "6.7"
            }
          ]
        },
        {
          "vendor": "Symantec Corporation",
          "product": "ProxySG",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "status": "affected",
              "version": "6.7"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-05-29T13:29:00.617",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/104282",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@symantec.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1040993",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@symantec.com"
    },
    {
      "url": "https://www.symantec.com/security-center/network-protection-security-advisories/SA167",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secure@symantec.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/104282",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1040993",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.symantec.com/security-center/network-protection-security-advisories/SA167",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Symantec Advanced Secure Gateway (ASG) 6.6 and 6.7, and ProxySG 6.5, 6.6, and 6.7 are susceptible to a SAML authentication bypass vulnerability. The products can be configured with a SAML authentication realm to authenticate network users in intercepted proxy traffic. When parsing SAML responses, ASG and ProxySG incorrectly handle XML nodes with comments. A remote attacker can modify a valid SAML response without invalidating its cryptographic signature. This may allow the attacker to bypass user authentication security controls in ASG and ProxySG. This vulnerability only affects authentication of network users in intercepted traffic. It does not affect administrator user authentication for the ASG and ProxySG management consoles."
    },
    {
      "lang": "es",
      "value": "Symantec Advanced Secure Gateway (ASG) 6.6 y 6.7 y ProxySG 6.5, 6.6 y 6.7 son susceptibles a una vulnerabilidad de omisión de autenticación SAML. Los productos pueden configurarse con un realm de autenticación SAML para autenticar a usuarios de red en tráfico de proxy interceptado. Al parsear respuestas SAML, ASG y ProxySG gestionan incorrectamente los nodos XML con comentarios. Un atacante remoto puede modificar una respuesta SAML válida sin invalidar su firma criptográfica. Esto podría permitir que el atacante omita los controles de seguridad de autenticación en ASG y ProxySG. Esta vulnerabilidad solo afecta a la autenticación de usuarios de red en el tráfico interceptado. No afecta a la autenticación de usuario administrador en las consolas de gestión de ASG y ProxySG."
    }
  ],
  "lastModified": "2026-06-17T01:59:54.100",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:broadcom:advanced_secure_gateway:6.6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A541B285-4265-4AED-80FC-AE02C1372645"
            },
            {
              "criteria": "cpe:2.3:a:broadcom:advanced_secure_gateway:6.7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3C1055B8-A926-4831-A8EC-E1A2C9DFFFDF"
            },
            {
              "criteria": "cpe:2.3:a:broadcom:symantec_proxysg:6.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C90E531A-A9AF-47F4-BDC5-E40AEE3CCFD5"
            },
            {
              "criteria": "cpe:2.3:a:broadcom:symantec_proxysg:6.6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "004F99F2-E750-4FC5-A2A6-65FD1C918676"
            },
            {
              "criteria": "cpe:2.3:a:broadcom:symantec_proxysg:6.7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "91A561A9-EA6E-461B-89FA-FA60F40C14B9"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@symantec.com"
}