CVE-2019-17187 : Vulnerability Insights and Analysis

A pre-authentication Directory Traversal vulnerability on FiberHome HG2201T 1.00.M5007_JS_201804 devices allows attackers to read arbitrary files.

Understanding CVE-2019-17187

This CVE involves a security flaw that enables unauthorized access to sensitive files on affected devices.

What is CVE-2019-17187?

The vulnerability permits attackers to perform Directory Traversal and access files through a specific endpoint on FiberHome HG2201T 1.00.M5007_JS_201804 devices.

The Impact of CVE-2019-17187

The exploit allows threat actors to read arbitrary files, potentially exposing sensitive information and compromising the device's security.

Technical Details of CVE-2019-17187

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw resides in the /var/WEB-GUI/cgi-bin/downloadfile.cgi endpoint, enabling pre-authentication Directory Traversal for unauthorized file reading.

Affected Systems and Versions

Affected Product: FiberHome HG2201T 1.00.M5007_JS_201804
Affected Version: Not applicable

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the endpoint to traverse directories and access files without proper authentication.

Mitigation and Prevention

Protecting systems from CVE-2019-17187 requires immediate action and long-term security measures.

Immediate Steps to Take

Disable access to the vulnerable endpoint /var/WEB-GUI/cgi-bin/downloadfile.cgi
Implement network segmentation to limit exposure

Long-Term Security Practices

Regularly update device firmware to patch known vulnerabilities
Conduct security assessments and penetration testing to identify and address weaknesses

Patching and Updates

Apply patches provided by FiberHome to address the Directory Traversal vulnerability