{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Citrix heeft een kwetsbaarheid verholpen in NetScaler ADC en NetScaler Gateway.\n\nOm kwetsbaar te zijn moet NetScaler worden geconfigureerd als Gateway (VPN-virtuele server, ICA Proxy, CVPN, RDP Proxy) of AAA virtual server. Let op, dit is vaak default config.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheid bevindt zich in de manier waarop geheugen wordt beheerd in NetScaler ADC en NetScaler Gateway. Dit kan leiden tot ongewenste \u0027control flow\u0027 en \u0027Denial-of-Service\u0027 situaties, vooral wanneer de producten zijn geconfigureerd als Gateway of AAA virtuele servers. De impact kan bestaan uit serviceonderbrekingen en aangetaste systeemintegriteit. Citrix meldt dat er exploits op niet-gemitigeerde systemen zijn waargenomen. \nHet NCSC adviseert organisaties met klem om de door Citrix beschikbaar gestelde beveiligingsupdate op korte termijn te installeren.\n",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Citrix heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Improper Restriction of Operations within the Bounds of a Memory Buffer",
        "title": "CWE-119"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference - cveprojectv5; nvd",
        "url": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788"
      }
    ],
    "title": "Kwetsbaarheid verholpen in Citrix NetScaler ADC en NetScaler Gateway",
    "tracking": {
      "current_release_date": "2025-06-25T14:54:38.413413Z",
      "generator": {
        "date": "2025-06-05T14:45:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.1"
        }
      },
      "id": "NCSC-2025-0203",
      "initial_release_date": "2025-06-25T14:54:38.413413Z",
      "revision_history": [
        {
          "date": "2025-06-25T14:54:38.413413Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:patch/13.1fipsandndcpp|\u003c37.236",
                "product": {
                  "name": "vers:patch/13.1fipsandndcpp|\u003c37.236",
                  "product_id": "CSAFPID-2939212"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:patch/13.1|\u003c59.19",
                "product": {
                  "name": "vers:patch/13.1|\u003c59.19",
                  "product_id": "CSAFPID-2939211"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:patch/14.1|\u003c47.46",
                "product": {
                  "name": "vers:patch/14.1|\u003c47.46",
                  "product_id": "CSAFPID-2939210"
                }
              }
            ],
            "category": "product_name",
            "name": "ADC"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:patch/13.1|\u003c59.19",
                "product": {
                  "name": "vers:patch/13.1|\u003c59.19",
                  "product_id": "CSAFPID-2939214"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:patch/13.1fipsandndcpp|\u003c37.236",
                "product": {
                  "name": "vers:patch/13.1fipsandndcpp|\u003c37.236",
                  "product_id": "CSAFPID-2939215"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:patch/14.1|\u003c47.46",
                "product": {
                  "name": "vers:patch/14.1|\u003c47.46",
                  "product_id": "CSAFPID-2939213"
                }
              }
            ],
            "category": "product_name",
            "name": "Gateway"
          }
        ],
        "category": "vendor",
        "name": "NetScaler"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-6543",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Restriction of Operations within the Bounds of a Memory Buffer",
          "title": "CWE-119"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-2939212",
          "CSAFPID-2939211",
          "CSAFPID-2939210",
          "CSAFPID-2939214",
          "CSAFPID-2939215",
          "CSAFPID-2939213"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-6543 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-6543.json"
        }
      ],
      "title": "CVE-2025-6543"
    }
  ]
}