attack-tree.md

Attack Tree Analysis for simplecov-ruby/simplecov

Objective: Exfiltrate Data OR Achieve RCE via SimpleCov

Attack Tree Visualization

                                     +-------------------------------------------------+
                                     |  Exfiltrate Data OR Achieve RCE via SimpleCov  |
                                     +-------------------------------------------------+
                                                      |
         +--------------------------------------------------------------------------------+
         |                                                                                |
+---------------------+                                                     +--------------------------+
|  Access Coverage    |                                                     |   Manipulate Coverage     |
|      Reports        |                                                     |       Data/Reports       |
|     [HIGH RISK]     |                                                     |                          |
+---------------------+                                                     +--------------------------+
         |
+--------+--------+                                                                 +--------+
|                 |                                                                 |        |
|  1. Unprotected |                                                                 |  5. Alter|
|    Report Dir   |                                                                 |  Config |
|    [HIGH RISK]  |                                                                 | [CRITICAL]|
+--------+--------+                                                                 +--------+
         |
+--------+--------+
|                 |
| 1a.  Default    | 1b.  Insufficient
|     Directory   |      Auth/Access
|     (e.g.,     |      Control
|     'coverage') |     [CRITICAL]
|    [CRITICAL]   |
+--------+--------+                                                               +--------+
                                                                                  |        |
                                                                                  | 5a. Change
                                                                                  |     output
                                                                                  |     directory
                                                                                  |     to web-
                                                                                  |     accessible
                                                                                  |     location
                                                                                  |    [CRITICAL]
                                                                                  +--------+

Attack Tree Path: 1. Access Coverage Reports [HIGH RISK]

This is the primary high-risk path, focusing on gaining unauthorized access to the generated coverage reports.

• 1. Unprotected Report Directory [HIGH RISK]: The reports are stored in a directory accessible without proper authentication or authorization.

  • 1a. Default Directory (e.g., 'coverage') [CRITICAL]:

    • Description: SimpleCov, by default, often stores reports in a directory named "coverage". If this directory is within the web root and lacks access controls, an attacker can directly access the reports by browsing to a predictable URL (e.g., https://example.com/coverage).
    • Likelihood: Medium
    • Impact: High
    • Effort: Very Low
    • Skill Level: Novice
    • Detection Difficulty: Medium

  • 1b. Insufficient Auth/Access Control [CRITICAL]:

    • Description: Even if a non-default directory is used, it might have weak permissions or lack proper authentication mechanisms. This allows unauthorized users to access the reports.
    • Likelihood: Low
    • Impact: High
    • Effort: Low
    • Skill Level: Intermediate
    • Detection Difficulty: Medium

Attack Tree Path: 2. Manipulate Coverage Data/Reports

• 5. Alter Config [CRITICAL]:
  • Description: This involves modifying SimpleCov's configuration, typically by gaining unauthorized access to configuration files or environment variables. The goal is to make SimpleCov more vulnerable.
  • Likelihood: Very Low
  • Impact: Very High
  • Effort: High
  • Skill Level: Advanced
  • Detection Difficulty: Hard
    • 5a. Change output directory to web-accessible location [CRITICAL]:
      • Description: The attacker modifies the SimpleCov configuration to store the coverage reports in a directory that is directly accessible via the web server (e.g., within the web root). This makes the reports publicly available.
      • Likelihood: Very Low
      • Impact: Very High
      • Effort: High
      • Skill Level: Advanced
      • Detection Difficulty: Hard