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CVE-2011-2593

Status: ModifiedMedium (6.8)—

Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a crafted Content-Length HTTP header, which triggers a heap-based buffer overflow.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Citrix — Access Gateway Plug-in

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2011-2593",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "PSIRT-CNA@flexerasoftware.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2014-08-12T20:55:02.527",
  "references": [
    {
      "url": "http://secunia.com/advisories/45299",
      "source": "PSIRT-CNA@flexerasoftware.com"
    },
    {
      "url": "http://secunia.com/secunia_research/2012-26",
      "source": "PSIRT-CNA@flexerasoftware.com"
    },
    {
      "url": "http://support.citrix.com/article/CTX134303",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "PSIRT-CNA@flexerasoftware.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/77317",
      "source": "PSIRT-CNA@flexerasoftware.com"
    },
    {
      "url": "http://secunia.com/advisories/45299",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/secunia_research/2012-26",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://support.citrix.com/article/CTX134303",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/77317",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a crafted Content-Length HTTP header, which triggers a heap-based buffer overflow."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de enteros en el método StartEpa en el control nsepacom ActiveX (nsepa.exe) en Citrix Access Gateway Enterprise Edition Plug-in para Windows 9.x anterior a 9.3-57.5 y 10.0 anterior a 10.0-69.4 permite a atacantes remotos ejecutar código arbitrario a través de una cabecera Content-Length HTTP manipulada, lo que provoca un desbordamiento de buffer basado en memoria dinámica."
    }
  ],
  "lastModified": "2026-06-16T23:31:36.910",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:citrix:access_gateway_plug-in:*:49-5:*:*:enterprise:windows:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CF196BEB-EB34-4666-BFC9-CF32E96E49AC",
              "versionEndIncluding": "9.3"
            },
            {
              "criteria": "cpe:2.3:a:citrix:access_gateway_plug-in:10.0:*:*:*:enterprise:windows:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EEF9E1EB-608C-4BBA-9871-6BB4BD8BE000"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "PSIRT-CNA@flexerasoftware.com"
}