CVE-2017-16878 : Security Advisory and Response

Palo Alto Networks PAN-OS before version 8.0.7 is vulnerable to cross-site scripting (XSS) through its Captive Portal function. This allows attackers to inject malicious scripts or HTML code.

Understanding CVE-2017-16878

What is CVE-2017-16878?

Cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS before 8.0.7 enables remote attackers to inject arbitrary web script or HTML by exploiting an unspecified configuration.

The Impact of CVE-2017-16878

This vulnerability can be exploited by attackers to execute malicious scripts within the context of the affected site, potentially leading to various attacks such as session hijacking, defacement, or stealing sensitive information.

Technical Details of CVE-2017-16878

Vulnerability Description

The flaw in the Captive Portal function of Palo Alto Networks PAN-OS before version 8.0.7 allows attackers to insert their own malicious web script or HTML code.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging a specific configuration within the Captive Portal function of PAN-OS before version 8.0.7.

Mitigation and Prevention

Immediate Steps to Take

Upgrade to version 8.0.7 or later of Palo Alto Networks PAN-OS to mitigate the XSS vulnerability.
Implement strict input validation mechanisms to prevent malicious script injection.

Long-Term Security Practices

Regularly monitor and update security configurations to address emerging vulnerabilities.
Conduct security audits and penetration testing to identify and remediate XSS vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Palo Alto Networks to ensure the system is protected against known vulnerabilities.