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CVE-2023-51127: Directory Traversal Vulnerability in FLIR AX8 Thermal Sensor Cameras

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Overview

This report focuses on a critical security vulnerability, identified as CVE-2023-51127, found in FLIR AX8 thermal sensor cameras. The vulnerability allows unauthenticated remote attackers to access sensitive files, potentially leading to system compromise or data leakage. Being a high-risk issue with a CVSS severity score of 7.5, it is crucial for users and administrators of affected products to understand and mitigate this vulnerability promptly.

Vulnerability Summary

CVE ID: CVE-2023-51127
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System Compromise, Data Leakage

Affected Products

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Product | Affected Versions

FLIR AX8 Thermal Sensor Cameras | Up to and including 1.46.16

How the Exploit Works

The vulnerability stems from improper access restriction within the FLIR AX8 thermal sensor cameras. An unauthenticated, remote attacker can exploit this by uploading a specially crafted symbolic link file. This file, when uploaded, allows the attacker to traverse directories and access arbitrary sensitive file contents. This could potentially lead to unauthorized access to confidential data or even full system compromise.

Conceptual Example Code

The following is a conceptual example of how an attacker might exploit this vulnerability via an HTTP request:

POST /upload HTTP/1.1
Host: target.example.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="file"; filename="symlink.txt"
Content-Type: text/plain
../../../../../etc/passwd
------WebKitFormBoundary7MA4YWxkTrZu0gW--

In this example, the attacker sends a malicious POST request to the upload endpoint of the target system, containing a symbolic link file that points to a sensitive system file (`/etc/passwd`).

Mitigation Measures

To mitigate this vulnerability, users of the affected products should apply the vendor-supplied patch immediately. If the patch cannot be applied due to any reason, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could serve as temporary mitigation measures. These systems can be configured to detect and block attempts to exploit this vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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