NCSC-2025-0355

Vulnerability from csaf_ncscnl - Published: 2025-11-07 10:07 - Updated: 2025-11-07 10:07
Summary
Kwetsbaarheden verholpen in Fortinet FortiOS en FortiProxy

Notes

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: 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. 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. 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.
Feiten
Fortinet heeft kwetsbaarheden verholpen in FortiOS en FortiProxy.
Interpretaties
De kwetsbaarheden omvatten een stack-gebaseerde buffer overflow die geauthenticeerde aanvallers in staat stelt om ongeautoriseerde code uit te voeren via speciaal vervaardigde CLI-commando's. Daarnaast zijn er problemen met onjuiste certificaatvalidatie die ongeauthenticeerde aanvallers in staat stellen om verbindingen te onderscheppen en te manipuleren, wat het risico op man-in-the-middle-aanvallen vergroot. Ook kunnen geauthenticeerde proxygebruikers domeinfronting-bescherming omzeilen door middel van speciaal vervaardigde HTTP-verzoeken. Verder zijn er kwetsbaarheden voor reflected cross-site scripting (XSS) en open redirect aanvallen, die kunnen leiden tot ongeautoriseerde acties in de context van de gebruiker. Bovendien kunnen aanvallers met alleen-lezen rechten gevoelige informatie over twee-factor-authenticatie (2FA) verkrijgen. Deze kwetsbaarheden kunnen worden geëxploiteerd via zorgvuldig vervaardigde HTTP-verzoeken.
Oplossingen
Fortinet heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans
medium
Schade
high
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-121
Stack-based Buffer Overflow
CWE-285
Improper Authorization
CWE-297
Improper Validation of Certificate with Host Mismatch
CWE-358
Improperly Implemented Security Check for Standard
CWE-532
Insertion of Sensitive Information into Log File
CWE-601
URL Redirection to Untrusted Site ('Open Redirect')
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
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    "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": "Fortinet heeft kwetsbaarheden verholpen in FortiOS en FortiProxy.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheden omvatten een stack-gebaseerde buffer overflow die geauthenticeerde aanvallers in staat stelt om ongeautoriseerde code uit te voeren via speciaal vervaardigde CLI-commando\u0027s. Daarnaast zijn er problemen met onjuiste certificaatvalidatie die ongeauthenticeerde aanvallers in staat stellen om verbindingen te onderscheppen en te manipuleren, wat het risico op man-in-the-middle-aanvallen vergroot. Ook kunnen geauthenticeerde proxygebruikers domeinfronting-bescherming omzeilen door middel van speciaal vervaardigde HTTP-verzoeken. Verder zijn er kwetsbaarheden voor reflected cross-site scripting (XSS) en open redirect aanvallen, die kunnen leiden tot ongeautoriseerde acties in de context van de gebruiker. Bovendien kunnen aanvallers met alleen-lezen rechten gevoelige informatie over twee-factor-authenticatie (2FA) verkrijgen. Deze kwetsbaarheden kunnen worden ge\u00ebxploiteerd via zorgvuldig vervaardigde HTTP-verzoeken.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
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        "text": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
        "title": "CWE-79"
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      {
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        "text": "Stack-based Buffer Overflow",
        "title": "CWE-121"
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        "title": "CWE-285"
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      {
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        "title": "CWE-358"
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        "text": "Insertion of Sensitive Information into Log File",
        "title": "CWE-532"
      },
      {
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        "text": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
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    "publisher": {
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      "contact_details": "cert@ncsc.nl",
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        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-23-354"
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        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-24-542"
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        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-25-684"
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    ],
    "title": "Kwetsbaarheden verholpen in Fortinet FortiOS en FortiProxy",
    "tracking": {
      "current_release_date": "2025-11-07T10:07:28.475542Z",
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        "name": "Stack-based Buffer Overflow"
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          "category": "other",
          "text": "Stack-based Buffer Overflow",
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        }
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        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
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        {
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          "text": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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        {
          "category": "description",
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          "title": "Summary"
        }
      ],
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        {
          "category": "self",
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-31366.json"
        }
      ],
      "scores": [
        {
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    {
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        "name": "Insertion of Sensitive Information into Log File"
      },
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          "category": "other",
          "text": "Insertion of Sensitive Information into Log File",
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        },
        {
          "category": "description",
          "text": "A vulnerability in FortiOS versions 7.6.0 to 7.6.3 and earlier allows attackers with read-only privileges to access sensitive 2FA-related information through log observation or the diagnose command.",
          "title": "Summary"
        }
      ],
      "product_status": {
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          "CSAFPID-2",
          "CSAFPID-3",
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          "summary": "CVE-2025-31514 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-31514.json"
        }
      ],
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            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4"
          ]
        }
      ],
      "title": "CVE-2025-31514"
    },
    {
      "cve": "CVE-2025-47890",
      "cwe": {
        "id": "CWE-601",
        "name": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)"
      },
      "notes": [
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          "category": "other",
          "text": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
          "title": "CWE-601"
        },
        {
          "category": "description",
          "text": "FortiOS versions 6.4 to 7.6.2, along with FortiProxy and FortiSASE, have vulnerabilities allowing unauthenticated attackers to execute open redirect and reflected XSS attacks via specially crafted HTTP requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
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          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4"
        ]
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          "category": "self",
          "summary": "CVE-2025-47890 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-47890.json"
        }
      ],
      "scores": [
        {
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            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:X/RC:C",
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          "products": [
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            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4"
          ]
        }
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      "title": "CVE-2025-47890"
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    {
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      "cwe": {
        "id": "CWE-285",
        "name": "Improper Authorization"
      },
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          "text": "Improper Authorization",
          "title": "CWE-285"
        },
        {
          "category": "description",
          "text": "An improper authorization vulnerability in Fortinet FortiOS and FortiProxy enables authenticated attackers to access static files from other VDOMs via specially crafted HTTP or HTTPS requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
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          "CSAFPID-2",
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        {
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          "summary": "CVE-2025-54822 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-54822.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:F/RL:X/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4"
          ]
        }
      ],
      "title": "CVE-2025-54822"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.