« Volver al listado

CVE-2011-2883

Estado: ModificadaAlta (9.3)—

The NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx in Citrix Access Gateway Enterprise Edition 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4 attempts to validate signed DLLs by checking the certificate subject, not the signature, which allows man-in-the-middle attackers to execute arbitrary code via HTTP header data referencing a DLL that was signed with a crafted certificate.

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 (1)

Citrix — Access Gateway

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2011-2883",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2011-07-21T23:55:04.317",
  "references": [
    {
      "url": "http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=928",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=928",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx in Citrix Access Gateway Enterprise Edition 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4 attempts to validate signed DLLs by checking the certificate subject, not the signature, which allows man-in-the-middle attackers to execute arbitrary code via HTTP header data referencing a DLL that was signed with a crafted certificate."
    },
    {
      "lang": "es",
      "value": "El control activeX NSEPA.NsepaCtrl.1 en nsepa.ocx de Citrix Access Gateway Enterprise Edition v8.1 antes de v8.1-67.7, v9.0  antes de v9.0-70.5 y v9.1 antes de v9.1-96.4 intenta validar archivos DLL firmados mediante el control del asunto del certificado en lugar de la firma, que permite a los atancante de hombre en el medio  ejecutar código arbitrario a través de datos de cabecera HTTP que referencian a una DLL firmada por un certificado manipulado."
    }
  ],
  "lastModified": "2026-06-16T23:32:10.670",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:citrix:access_gateway:8.1:*:enterprise:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9A7BC4F8-DF07-499B-90CD-53EAB854014B"
            },
            {
              "criteria": "cpe:2.3:a:citrix:access_gateway:9.0:*:enterprise:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0DCDF4DE-F0DF-427A-980C-62314FCE6A45"
            },
            {
              "criteria": "cpe:2.3:a:citrix:access_gateway:9.1:*:enterprise:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F409FE7A-88D6-4FFB-8D78-0C0FCFB5DD8E"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}