Coinbase Commerce Content-Security-Policy Bypass Scanner

Coinbase Commerce is a popular platform used by businesses to manage cryptocurrency payments and transactions. In the realm of digital finance, it enables merchants to accept cryptocurrencies like Bitcoin and Ethereum directly into their wallets, removing the need for a middleman. The software is primarily used in e-commerce environments to broaden payment options and increase transaction efficiency. Various businesses, from small enterprises to large corporations, leverage Coinbase Commerce to capitalize on the growing crypto economy. Due to its widespread use, maintaining security within its platform is critical. This scanner helps organizations identify potential security flaws in their deployment of Coinbase Commerce.

The Content-Security-Policy Bypass vulnerability associated with Coinbase Commerce presents a risk of Cross-Site Scripting (XSS). XSS vulnerabilities allow attackers to inject malicious scripts into web pages viewed by users. When a CSP is bypassed, it fails to enforce the correct security policies, allowing unsafe scripts to run. Such vulnerabilities are particularly concerning as they can be exploited to execute arbitrary code. This scanner detects potential bypasses of CSP in Coinbase Commerce deployments, which could be exploited to inject malicious scripts.

Technical details of the vulnerability involve the ability to inject scripts into the Coinbase Commerce payment interface. Vulnerable parameters include those that can affect CSP settings, making it possible for attackers to manipulate web page content. The endpoint susceptible to attack is the one that implements CSP without proper validation. Specifically, the scanner checks for CSP policies in headers and attempts to inject scripts to detect potential bypasses. The detection strategy employs a combination of word matching and headless browsing to verify the presence of XSS exploitation capabilities.

Exploiting this vulnerability can lead to severe consequences, including unauthorized access to sensitive user data. Attackers could execute arbitrary scripts that compromise the integrity and confidentiality of user communications. Potential effects include session hijacking, defacement of content, and unauthorized data exfiltration. This could damage a business's reputation and erode customer trust if sensitive data is exposed. Therefore, it is crucial to identify and remedy such vulnerabilities immediately to uphold the security and trustworthiness of payment systems.

REFERENCES

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