DigitalOcean Anchor Content-Security-Policy Bypass Scanner

DigitalOcean Anchor is a service platform often used by developers and businesses to manage cloud-based deployments and services. It's leveraged for its user-friendly interface and reliable infrastructure capabilities, supporting a wide array of applications in cloud computing. The platform allows users to easily deploy, manage, and scale applications efficiently. Companies and individual developers utilize DigitalOcean Anchor for its robust API that facilitates seamless integrations and automations. It aids organizations in reducing deployment time and increasing application uptime. The service's security and compliance measures ensure data protection and operational reliability.

The vulnerability detected in this context is Cross-Site Scripting (XSS), which is a common security flaw found within web applications. XSS vulnerabilities allow an attacker to inject malicious scripts into content from otherwise trusted websites. These vulnerabilities are typically exploited to execute scripts in the context of a user’s browser, often with the intent of stealing session tokens, defacing web content, or redirecting users to malicious websites. XSS can occur through various vectors, including URL manipulation, form inputs, and cookies. Its presence in a widely used platform such as DigitalOcean Anchor can compromise user data and integrity on affected sites. Protecting against XSS is essential as it can lead to severe data breaches and operational interruptions if exploited.

Technically, the vulnerability exists due to improper security policies in handling content security on the web application interface of DigitalOcean Anchor. Specifically, the Content-Security-Policy (CSP) bypass allows scripts from third-party domains, potentially executed by unauthorized actors. The issue lies within the HTTP header configuration, where injected payloads are not sufficiently sanitized or restricted. This template simulates a CSP bypass scenario by executing a script from a controlled payload that calls back to a specified URL, forcing an alert box execution on successful exploitation. The detection uses fuzzing techniques to test for the presence of this CSP bypass on targeted digital assets. Mitigating this requires stringent CSP rules and proper input validation on affected endpoints.

When exploited, this vulnerability can lead to unauthorized script execution, which compromises the integrity of client-side operations. Potential effects include personal data theft, such as credentials or session cookies, and unauthorized actions taken on behalf of the user. Moreover, users can be redirected to malicious sites, leading to further exploitation or phishing attacks. If left unchecked, organizations may suffer significant reputational damage and loss of trust from clients and users. Addressing this vulnerability is crucial for maintaining the secure and trusted operation of web services utilizing DigitalOcean Anchor.

REFERENCES

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