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attack-surface.md

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Attack Surface Analysis for juliangarnier/anime

Attack Surface: Client-Side Dependency Vulnerabilities

  • Description: Third-party libraries like anime.js can contain security vulnerabilities that attackers can exploit.
  • How anime.js Contributes: By including anime.js, the application's security posture becomes dependent on the library's code. A vulnerability in anime.js directly exposes applications using it.
  • Example: A critical vulnerability is discovered in anime.js that allows for arbitrary JavaScript execution when processing a specially crafted animation configuration. Applications using the vulnerable version are immediately at risk if they handle external animation data or are targeted by an attacker exploiting this vulnerability.
  • Impact: Remote Code Execution (RCE) in the user's browser, leading to complete compromise of the client-side application context. This can result in session hijacking, data theft, malware injection, and full control over the user's interaction with the application.
  • Risk Severity: Critical
  • Mitigation Strategies:
    • Immediate Updates: Apply security patches and update to the latest version of anime.js as soon as vulnerabilities are disclosed and fixes are available.
    • Proactive Monitoring: Continuously monitor security advisories and vulnerability databases related to anime.js and its dependencies.
    • Automated Dependency Scanning: Integrate automated dependency scanning tools into the development pipeline to detect vulnerable versions of anime.js before deployment.
    • Subresource Integrity (SRI) with Vigilance: While SRI protects against CDN tampering, it's crucial to update SRI hashes whenever anime.js is updated to a patched version.

Attack Surface: Cross-Site Scripting (XSS) via Animation Properties (Indirect)

  • Description: Improper handling of user-controlled data used in conjunction with anime.js can indirectly create Cross-Site Scripting (XSS) vulnerabilities.
  • How anime.js Contributes: anime.js's core functionality is to manipulate the DOM based on provided animation properties, including targeting elements. If these properties are dynamically constructed using unsanitized user input, it opens a pathway for XSS injection.
  • Example: An application allows users to define custom CSS selectors to target elements for animation. If this user-provided selector is not sanitized, an attacker could inject a malicious selector like *,[attribute=value]onerror=alert('XSS') (or similar variations). When anime.js processes this selector, it could inadvertently trigger the onerror event on matched elements, executing the injected JavaScript.
  • Impact: Full Cross-Site Scripting (XSS) vulnerability. Attackers can execute arbitrary JavaScript code in the user's browser within the application's context. This allows for session hijacking, cookie theft, defacement, redirection to malicious sites, sensitive data exfiltration, and other malicious actions.
  • Risk Severity: High
  • Mitigation Strategies:
    • Strict Input Sanitization and Validation: Thoroughly sanitize and validate all user-provided data before using it to construct anime.js animation properties, especially the targets property and any properties that could indirectly manipulate DOM attributes or content. Use context-aware output encoding where appropriate.
    • Principle of Least Privilege for Selectors: Avoid directly using user input to construct broad or dynamic CSS selectors. If possible, use predefined, controlled selectors or safer DOM manipulation methods.
    • Content Security Policy (CSP): Implement a robust Content Security Policy to significantly reduce the impact of XSS vulnerabilities, even if they are indirectly introduced through animation logic. Use directives like script-src and style-src to restrict script execution and style application to trusted sources only.
    • Regular Security Code Reviews: Conduct regular security code reviews, specifically focusing on areas where user input interacts with anime.js and DOM manipulation logic.