CVE-2017-16564 : Exploit Details and Defense Strategies

Vulnerability in Vonage (Grandstream) HT802 devices allows for Stored Cross-site scripting (XSS) via the /cgi-bin/config2 endpoint.

Understanding CVE-2017-16564

What is CVE-2017-16564?

The Vonage (Grandstream) HT802 devices are susceptible to a Stored Cross-site scripting (XSS) vulnerability, enabling remote authenticated users to inject malicious web scripts or HTML into the DHCP vendor class ID field (P148).

The Impact of CVE-2017-16564

This vulnerability could be exploited by attackers to execute arbitrary code, steal sensitive information, or perform unauthorized actions on the affected devices.

Technical Details of CVE-2017-16564

Vulnerability Description

The vulnerability exists in the /cgi-bin/config2 endpoint of Vonage (Grandstream) HT802 devices, allowing authenticated remote users to inject malicious scripts or HTML via the DHCP vendor class ID field.

Affected Systems and Versions

Product: Vonage (Grandstream) HT802
Vendor: Vonage
Versions: All versions are affected

Exploitation Mechanism

Attackers with authenticated access can exploit this vulnerability by injecting malicious web scripts or HTML code into the DHCP vendor class ID field (P148) of the affected devices.

Mitigation and Prevention

Immediate Steps to Take

Implement strict input validation to sanitize user inputs effectively.
Regularly monitor and audit configurations and logs for any suspicious activities.
Apply security patches and updates provided by the vendor promptly.

Long-Term Security Practices

Conduct regular security training for users to raise awareness about potential threats like XSS attacks.
Employ network segmentation to isolate critical devices and limit the impact of potential breaches.
Utilize web application firewalls to detect and block malicious web traffic.

Patching and Updates

It is crucial to apply the latest security patches and updates released by Vonage (Grandstream) to address and mitigate the XSS vulnerability in the HT802 devices.