Coinbase Investor Content-Security-Policy Bypass Scanner

Coinbase Investor is a platform used worldwide by investors to manage and track their digital assets associated with cryptocurrency. It allows users to access a range of investment tools and provides a secure environment for trading and financial analysis. Both individual and institutional investors utilize the platform to diversify their portfolios and maximize returns on their digital investments. The platform is frequently used in financial sectors to provide real-time data analysis and investment tracking, enabling users to make informed decisions. Built with modern web technologies, Coinbase Investor aims to ensure seamless user experience and robust security through various built-in features.

This specific cross-site scripting vulnerability affects the Content-Security-Policy implementation on the Coinbase Investor platform. It potentially allows attackers to inject and execute malicious scripts due to improper content security controls. As CSP headers are meant to prevent content injections, any bypass could lead to unauthorized actions on the client side. By exploiting this weakness, attackers may manipulate content or steal user session data. The vulnerability can be triggered under specific conditions where CSP headers are inadequately enforced. Overall, this lapse in security could lead to broader implications affecting user trust and data integrity.

This vulnerability exploits a gap in the Content-Security-Policy by incorporating a script that interacts directly with the Coinbase Investor site. The specific endpoint and parameter vulnerable is the callback function within the script URL, which doesn't get adequately sanitized. A forged script is injected, bypassing the CSP, and used to confirm the domain through a cross-site scripting attack. This technical shortcoming can be targeted by encoding the mal-script to replace query parameters dynamically. Matchers in the payload detect if the script execution leads to a confirmation of domain control on the client-side. Consequently, lack of adequate parameter validation amplifies the exploit's effectiveness.

If exploited, the vulnerability could lead to unauthorized access and manipulation of user data. Potential consequences include identity theft due to session hijacking, financial fraud from misleading information, and privacy breaches. Additionally, users could be involuntarily redirected to malicious sites or have sensitive data such as login credentials recorded. Overall service disruption and customer distrust may arise from successful exploitation. In a worst-case scenario, this could result in legal liabilities and severe financial losses for service providers.

REFERENCES

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