Skip to content

Latest commit

 

History

History
36 lines (29 loc) · 5 KB

attack-surface.md

File metadata and controls

36 lines (29 loc) · 5 KB

Attack Surface Analysis for wenchaod/fscalendar

Attack Surface: Cross-Site Scripting (XSS) via Configuration Options

  • Description: Injection of malicious JavaScript code through unsanitized configuration options processed and rendered by fscalendar.
  • fscalendar Contribution: fscalendar's code might render configuration options (e.g., event titles, custom HTML snippets) into the DOM without proper encoding or sanitization, creating an XSS vulnerability.
  • Example: Providing a malicious event title like <img src=x onerror=alert('XSS')> in the configuration. If fscalendar directly renders this title, the JavaScript will execute when the calendar is displayed.
  • Impact: Full compromise of the user's browser session, potentially leading to account takeover, data theft, malware injection, or website defacement.
  • Risk Severity: Critical
  • Mitigation Strategies:
    • Strict Input Sanitization: fscalendar must rigorously sanitize all configuration options before rendering them. Implement HTML entity encoding or use a robust sanitization library to neutralize potentially harmful characters and scripts.
    • Content Security Policy (CSP): Employ a strong CSP to limit the sources from which the browser can load resources and execute scripts, mitigating the impact of XSS even if it occurs.

Attack Surface: DOM-Based XSS via Unsafe DOM Manipulation

  • Description: XSS vulnerabilities arising from insecure DOM manipulation within fscalendar's JavaScript code, where user-controlled data or configuration options are directly inserted into the DOM without sanitization.
  • fscalendar Contribution: If fscalendar uses JavaScript methods like innerHTML to insert user-provided data or configuration values into the DOM without proper sanitization, it becomes vulnerable to DOM-based XSS.
  • Example: If fscalendar allows users to provide custom notes for calendar dates and uses innerHTML to display these notes without sanitizing them, an attacker could inject malicious JavaScript within the notes.
  • Impact: Similar to reflected XSS, DOM-based XSS can result in complete compromise of the user's browser session, data exfiltration, and unauthorized actions performed on the user's behalf.
  • Risk Severity: Critical
  • Mitigation Strategies:
    • Secure DOM APIs: fscalendar's developers should use secure DOM manipulation methods. Prefer textContent or setAttribute for inserting user-provided data. If innerHTML is necessary, ensure rigorous sanitization of the input using a trusted library.
    • Code Review and Security Audit: Thoroughly review fscalendar's JavaScript source code to identify and rectify any instances of unsafe DOM manipulation. Conduct regular security audits to proactively find and fix vulnerabilities.

Attack Surface: Client-Side Logic Flaws Leading to Security Bypass

  • Description: Bugs or logical errors within fscalendar's JavaScript code that, while not directly XSS, can be exploited to bypass security mechanisms or cause unintended actions within the application that integrates fscalendar.
  • fscalendar Contribution: Complex logic in fscalendar (e.g., date handling, event processing, UI state management) might contain flaws that, when triggered by specific user inputs or configurations, can lead to security-relevant issues in the application using it.
  • Example: A logic error in fscalendar's event handling might allow an attacker to manipulate event display or scheduling in a way that bypasses intended access controls or data validation implemented by the application. For instance, manipulating date ranges to view events they shouldn't have access to.
  • Impact: Potential bypass of application security controls, unauthorized access to data or functionality, or data integrity issues, depending on how the application relies on fscalendar's logic.
  • Risk Severity: High (can escalate to Critical depending on the bypassed security mechanism and its impact)
  • Mitigation Strategies:
    • Rigorous Testing: Implement comprehensive testing of the application's integration with fscalendar, focusing on edge cases, boundary conditions, and potential logic flaws in fscalendar's behavior. Include security-focused test cases to identify potential bypass scenarios.
    • Library Updates and Patches: Stay vigilant for updates and security patches released for fscalendar. Apply updates promptly to address known vulnerabilities and logic errors.
    • Input Validation and Server-Side Verification: Do not solely rely on client-side logic provided by fscalendar for security-critical operations. Implement robust input validation and server-side verification to enforce security controls and prevent bypasses.