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Attack Tree Analysis for iamkun/dayjs

Objective: Manipulate Date/Time Processing

Attack Tree Visualization

                                      Manipulate Date/Time Processing
                                                  |
                                 -------------------------------------
                                 |                                   |
                      1.  Exploit Parsing Vulnerabilities      2.  Exploit Locale/Plugin Issues
                                 |
                -----------------------------------          ------------------------
                |                 |                                   |
        1.1  Unexpected    1.2  Prototype                             2.2  Plugin
             Input to      Pollution via                                Vulnerability
             `dayjs()`     `dayjs.extend()`                             (if custom)
             or Plugins    or `dayjs()`                                 [HIGH RISK]
             [HIGH RISK]   [CRITICAL]                                    |
                |                                                -------------------
        -------------------                                        |                 |
        |                 |                                  2.2.1 Input     2.2.2 Logic
1.1.1  Crafted     1.1.2  Invalid                                Validation    Flaws
       Date/Time    Date/Time                                  Bypass
       String       Object
       [HIGH RISK]  (if passed
                    to plugins)
                    [HIGH RISK]

Attack Tree Path: 1. Exploit Parsing Vulnerabilities [HIGH RISK]

  • Description: This is a broad category encompassing vulnerabilities that arise from how dayjs (or its plugins) parses date/time input. Attackers can exploit these vulnerabilities by providing malformed or unexpected input.
  • Sub-Vectors:

Attack Tree Path: 1.1 Unexpected Input to dayjs() or Plugins [HIGH RISK]

  • Description: The core dayjs() function and many plugins accept various input types (strings, numbers, objects, etc.). If the application doesn't properly validate and sanitize this input before passing it to dayjs, an attacker can craft malicious input to trigger unexpected behavior.
  • Likelihood: Medium
  • Impact: Medium-High
  • Effort: Low
  • Skill Level: Intermediate
  • Detection Difficulty: Medium
  • Mitigation:
    • Strictly validate all user-supplied date/time inputs using a whitelist approach.
    • Sanitize input before passing it to dayjs or plugins.
    • Limit the length of date/time strings.
    • Avoid passing user-supplied objects directly to plugins; validate object properties if necessary.

Attack Tree Path: 1.1.1 Crafted Date/Time String [HIGH RISK]

  • Description: An attacker crafts a specially designed date/time string that exploits a parsing bug or weakness in dayjs or a plugin. This could involve extremely long strings, unusual characters, or strings designed to trigger specific edge cases in the parsing logic.
  • Likelihood: Medium
  • Impact: Medium
  • Effort: Low
  • Skill Level: Intermediate
  • Detection Difficulty: Medium
  • Mitigation: Same as 1.1 (strict input validation and sanitization).

Attack Tree Path: 1.1.2 Invalid Date/Time Object (if passed to plugins) [HIGH RISK]

  • Description: If the application passes user-supplied objects (not just strings) to dayjs plugins, an attacker might craft a malicious object to exploit vulnerabilities in how the plugin handles object properties. This is less common than string-based attacks but can be more impactful.
  • Likelihood: Low
  • Impact: Medium-High
  • Effort: Medium
  • Skill Level: Advanced
  • Detection Difficulty: Hard
  • Mitigation:
    • Avoid passing user-supplied objects directly to dayjs plugins.
    • If necessary, thoroughly validate all properties of the object before passing it to the plugin. Use a whitelist approach for allowed properties and types.

Attack Tree Path: 1.2 Prototype Pollution via dayjs.extend() or dayjs() [CRITICAL]

  • Description: Prototype pollution is a JavaScript vulnerability where an attacker can modify the properties of an object's prototype, affecting all objects that inherit from that prototype. If dayjs.extend() (used for adding plugins) or the core dayjs() function is vulnerable, an attacker could globally alter the behavior of dayjs objects.
  • Likelihood: Very Low
  • Impact: Very High (complete application compromise)
  • Effort: High
  • Skill Level: Expert
  • Detection Difficulty: Very Hard
  • Mitigation:
    • Be extremely cautious when using dayjs.extend(). Thoroughly vet any third-party plugins.
    • Implement general JavaScript prototype pollution mitigations:
      • Use Object.create(null) for objects that shouldn't inherit from Object.prototype.
      • Freeze objects to prevent modification.
      • Use libraries specifically designed to prevent prototype pollution.

Attack Tree Path: 2. Exploit Locale/Plugin Issues

  • Sub-Vectors:

Attack Tree Path: 2.2 Plugin Vulnerability (if custom) [HIGH RISK]

  • Description: Custom dayjs plugins are a significant risk because they are less likely to have undergone the same level of scrutiny as widely-used, well-maintained plugins. Any vulnerability in a custom plugin could be exploited.
  • Likelihood: Medium
  • Impact: High (depends on the plugin's functionality)
  • Effort: Variable (depends on the plugin and vulnerability)
  • Skill Level: Variable (depends on the vulnerability)
  • Detection Difficulty: Variable (depends on the vulnerability and logging)
  • Mitigation:
    • Thoroughly review and test custom plugins for security vulnerabilities.
    • Follow secure coding practices, paying close attention to input validation and error handling.
    • Consider using static analysis tools to identify potential vulnerabilities.
  • Specific Vulnerability Examples:
    • 2.2.1 Input Validation Bypass: The plugin fails to properly validate user-supplied input, allowing an attacker to inject malicious data.
    • 2.2.2 Logic Flaws: Errors in the plugin's logic can lead to unexpected behavior or vulnerabilities. This is a broad category encompassing any flaw in the plugin's code that could be exploited.