Path Traversal in Fortinet FortiOS and FortiProxy

Executive Summary

This vulnerability is a 'path traversal' issue, which is a type of security flaw where an attacker can access files or directories outside the intended restricted directory. In this case, the vulnerability affects multiple Fortinet products, including FortiOS, FortiPAM, and FortiProxy.

The vulnerability allows an attacker to execute unauthorized code or commands on the affected system. This means the attacker could potentially take control of the system or perform actions they are not permitted to do.

The affected versions include FortiOS 7.6.0 through 7.6.6, FortiOS 7.4.0 through 7.4.9, and all versions of FortiOS 7.2, 7.0, and 6.4. It also impacts various versions of FortiPAM (from 1.0 to 1.8.0) and FortiProxy (7.6.0 through 7.6.5, 7.4 through 7.4.13, and all versions of 7.2 and 7.0).

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Detection Guidance

The provided CVE data does not include specific detection methods or commands for identifying the path traversal vulnerability in Fortinet products. Detection typically involves checking for unusual access patterns or attempting to exploit the vulnerability in a controlled environment, but this requires specialized security tools or scripts.

To detect this vulnerability, you may consider the following general approaches, though they are not explicitly detailed in the CVE context:

• Use vulnerability scanning tools like Nessus, OpenVAS, or Fortinet's own security advisories to check for affected versions of FortiOS, FortiPAM, or FortiProxy.
• Monitor network traffic for unusual requests that attempt to access restricted directories or files, such as requests containing '../' sequences or encoded path traversal characters.
• Review logs from Fortinet devices for suspicious activity, such as repeated failed access attempts to sensitive paths.

For precise detection, refer to Fortinet's official security advisories or contact their support team for guidance tailored to your environment.

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Impact Analysis

If you are using any of the affected Fortinet products and versions, this vulnerability could have serious consequences for your systems and data.

• An attacker could exploit this vulnerability to execute unauthorized code or commands on your system, potentially gaining control over it.
• This could lead to unauthorized access to sensitive information stored on the affected systems.
• The attacker might be able to modify or delete critical files, disrupting your operations or causing data loss.
• If the affected system is part of a larger network, the attacker could use it as a foothold to move laterally and compromise other systems.

The CVSS base score for this vulnerability is 5.5, indicating a medium severity level. However, the specific impact depends on the context of your environment and how the affected systems are used.

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Compliance Impact

This vulnerability could have significant implications for compliance with various standards and regulations, depending on the nature of the data and systems involved.

• GDPR (General Data Protection Regulation): If the affected systems process or store personal data of EU citizens, this vulnerability could lead to unauthorized access or disclosure of that data. Under GDPR, organizations must implement appropriate security measures to protect personal data. Failure to address this vulnerability could result in non-compliance and potential fines.
• HIPAA (Health Insurance Portability and Accountability Act): If the affected systems handle protected health information (PHI), this vulnerability could lead to unauthorized access or disclosure of PHI. HIPAA requires covered entities to implement safeguards to protect PHI, and failure to address this vulnerability could result in non-compliance and penalties.
• Other standards like PCI DSS (Payment Card Industry Data Security Standard): If the affected systems process payment card information, this vulnerability could lead to unauthorized access to cardholder data. PCI DSS requires organizations to maintain a secure environment for processing payment card data, and this vulnerability could result in non-compliance.

In general, most compliance frameworks require organizations to maintain the confidentiality, integrity, and availability of sensitive data. This vulnerability could compromise all three aspects, leading to potential non-compliance and associated consequences.

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Mitigation Strategies

Based on the CVE description, the following immediate steps are recommended to mitigate the path traversal vulnerability in affected Fortinet products:

• Upgrade to the latest patched version of FortiOS, FortiPAM, or FortiProxy as soon as possible. The CVE mentions affected versions, so ensure your systems are updated to versions beyond those listed (e.g., FortiOS 7.6.7 or later, FortiPAM 1.8.1 or later, etc.).
• If upgrading is not immediately possible, apply any available workarounds or mitigations provided by Fortinet. This may include disabling vulnerable features or restricting access to affected interfaces.
• Restrict network access to Fortinet management interfaces to trusted IP addresses only, reducing the attack surface.
• Monitor affected systems for signs of exploitation, such as unusual file access or command execution attempts.
• Review and enforce strict input validation on any user-supplied paths or file names in custom scripts or configurations interacting with Fortinet devices.

For official mitigation steps, consult Fortinet's PSIRT advisories or security bulletins related to this CVE.

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