CVE-2017-16836 Explained : Impact and Mitigation

Arris TG1682G devices with Comcast TG1682_2.0s7_PRODse 10.0.59.SIP.PC20.CT software are vulnerable to Unauthenticated Stored XSS via the actionHandler/ajax_managed_services.php service parameter.

Understanding CVE-2017-16836

The vulnerability was made public on November 15, 2017, and poses a risk of unauthorized script injection.

What is CVE-2017-16836?

The Arris TG1682G devices running specific Comcast software versions are susceptible to Unauthenticated Stored XSS, allowing attackers to inject malicious scripts.

The Impact of CVE-2017-16836

The vulnerability enables attackers to execute arbitrary code within the context of the affected service, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2017-16836

The following technical aspects provide insight into the vulnerability.

Vulnerability Description

The flaw resides in the service parameter of the actionHandler/ajax_managed_services.php function, facilitating Unauthenticated Stored XSS.

Affected Systems and Versions

Product: Arris TG1682G
Vendor: Comcast
Software Version: TG1682_2.0s7_PRODse 10.0.59.SIP.PC20.CT

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the service parameter, potentially compromising the device and user data.

Mitigation and Prevention

Protecting against CVE-2017-16836 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable remote access to the affected service or device if not required.
Regularly monitor for unauthorized script injections or unusual activities.

Long-Term Security Practices

Implement network segmentation to isolate critical devices.
Conduct regular security assessments and penetration testing to identify vulnerabilities.
Stay informed about security updates and patches from the vendor.

Patching and Updates

Apply patches and updates provided by Arris or Comcast to address the vulnerability and enhance device security.