Zendesk Support Content-Security-Policy Bypass Scanner

Zendesk Support is a widely used customer service software platform designed to improve customer engagement and streamline support operations. It is utilized by businesses of all sizes to provide efficient and effective customer service through various channels such as email, chat, and social media. The software integrates with numerous applications and offers customizable workflows to accommodate diverse business needs. Companies implement Zendesk Support to enhance customer satisfaction, optimize support processes, and gather valuable customer feedback. The platform's extensive features include ticketing, automation, reporting, and collaboration tools, making it a versatile solution for managing customer interactions.

The vulnerability detected in Zendesk Support pertains to a possible Content-Security-Policy (CSP) Bypass that could lead to Cross-Site Scripting (XSS) attacks. CSP is a security feature that helps prevent XSS by controlling the sources from which a web page can load resources. Bypassing CSP can allow attackers to execute arbitrary scripts within a user's browser session. This vulnerability could occur due to misconfigurations or insufficient CSP settings, making the application susceptible to internal or external script injections. When exploited, attackers could gain unauthorized access to sensitive information or manipulate the display and behavior of the web application.

Technically, the vulnerability involves injecting a malicious script through the Zendesk Support application using specially crafted payloads. The template navigates to specific endpoints within Zendesk Support to check for CSP misconfigurations. If CSP is not properly enforced, the payload can execute upon page loading, allowing attackers to bypass security controls. The detection process involves analyzing HTTP headers and monitoring script behaviors in controlled testing environments. This approach helps identify instances where CSP policies might be circumvented, aiding security teams in pinpointing weak points in their configurations.

The possible effects of exploiting this vulnerability include unauthorized access to user sessions, data exfiltration, and manipulation of web content. Attackers could perform actions on behalf of a user without their consent, leading to data breaches and loss of trust. Additionally, compromised systems could be used as entry points for further attacks within an organization's network. Mitigating this vulnerability is crucial in maintaining the integrity and confidentiality of customer interactions managed through Zendesk Support.

REFERENCES

• https://github.com/renniepak/CSPBypass/blob/main/data.tsv