CVE-2017-12066 Explained : Impact and Mitigation

Cross-site scripting (XSS) vulnerability in aggregate_graphs.php in Cacti versions prior to 1.1.16 allows remote authenticated users to inject arbitrary web script or HTML via specially crafted HTTP Referer headers. This vulnerability is related to the $cancel_url variable and is a result of an incomplete fix for CVE-2017-11163.

Understanding CVE-2017-12066

This CVE entry describes a security issue in Cacti that could be exploited by remote authenticated users to execute XSS attacks.

What is CVE-2017-12066?

The vulnerability in aggregate_graphs.php in Cacti versions before 1.1.16 enables remote authenticated users to insert malicious web script or HTML through specially crafted HTTP Referer headers.

The Impact of CVE-2017-12066

The vulnerability allows attackers to execute cross-site scripting attacks, potentially compromising the integrity and security of the affected systems.

Technical Details of CVE-2017-12066

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The vulnerability arises due to a lack of proper input validation in the $cancel_url variable, allowing attackers to inject malicious scripts or HTML code.

Affected Systems and Versions

Affected Version: Cacti versions prior to 1.1.16
Systems: Cacti installations that have not been updated to version 1.1.16

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specifically crafted HTTP Referer headers to the target system, leveraging the $cancel_url variable to execute XSS attacks.

Mitigation and Prevention

Protecting systems from CVE-2017-12066 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Cacti to version 1.1.16 or later to mitigate the vulnerability.
Monitor and restrict HTTP Referer headers to prevent malicious injections.

Long-Term Security Practices

Implement strict input validation and output encoding in web applications.
Educate users on safe browsing practices to minimize the risk of XSS attacks.

Patching and Updates

Regularly apply security patches and updates provided by Cacti to address known vulnerabilities and enhance system security.