CVE-2017-17739 : Exploit Details and Defense Strategies

BrightSign Digital Signage (4k242) device is vulnerable to a directory traversal flaw, allowing unauthorized access to files.

Understanding CVE-2017-17739

The vulnerability in the BrightSign Digital Signage device enables attackers to read or modify files through a specific URL parameter.

What is CVE-2017-17739?

The directory traversal vulnerability in the BrightSign Digital Signage (4k242) device (Firmware 6.2.63 and earlier) allows unauthorized access to files via the rp parameter in the /storage.html URL.

The Impact of CVE-2017-17739

This vulnerability permits unauthorized individuals to access files, potentially compromising sensitive information or altering file content.

Technical Details of CVE-2017-17739

The technical aspects of the CVE-2017-17739 vulnerability are as follows:

Vulnerability Description

The BrightSign Digital Signage (4k242) device (Firmware 6.2.63 and below) is susceptible to directory traversal through the rp parameter in the /storage.html URL, enabling attackers to read or write files.

Affected Systems and Versions

Product: BrightSign Digital Signage (4k242)
Firmware Versions: 6.2.63 and earlier

Exploitation Mechanism

Attackers exploit the rp parameter in the /storage.html URL to gain unauthorized access to files on the BrightSign Digital Signage device.

Mitigation and Prevention

Protect your systems from CVE-2017-17739 with the following measures:

Immediate Steps to Take

Update the BrightSign Digital Signage device to a patched firmware version.
Restrict access to the /storage.html URL to authorized users only.

Long-Term Security Practices

Regularly monitor and audit file access and modifications on the device.
Implement strong access controls and authentication mechanisms to prevent unauthorized entry.

Patching and Updates

Apply security patches and firmware updates provided by BrightSign to address the vulnerability.