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Attack Tree Analysis for simd-lite/simd-json

Objective: To cause a denial-of-service (DoS) or achieve arbitrary code execution (ACE) in an application utilizing simd-json by exploiting vulnerabilities or weaknesses specific to the library's implementation.

Attack Tree Visualization

+-------------------------------------------------+ | Attacker Goal: DoS or ACE via simd-json Exploit | [CRITICAL] +-------------------------------------------------+ | +--------------------------------+ +--------------------------------+ | 1. Denial of Service (DoS) | | 2. Arbitrary Code Execution (ACE) | [CRITICAL] +--------------------------------+ +--------------------------------+ | +-------------------------------------------------+ | 1.1 Crafted Input Causing Excessive Memory Alloc. | [HIGH RISK] +-------------------------------------------------+ | +---------------------------------+ | 1.1.1 Extremely Deeply Nested JSON | [HIGH RISK] +---------------------------------+ | +---------------------------------------+ | 1.1.2 Extremely Large String/Number Values | [HIGH RISK] +---------------------------------------+ | +-------------------------------------+
| 1.1.3 Large Number of Keys in Object | [HIGH RISK] +-------------------------------------+

Attack Tree Path: Attacker Goal: DoS or ACE via simd-json Exploit [CRITICAL]

  • Description: The ultimate objective of the attacker is to either disrupt the service (DoS) or gain complete control (ACE) by targeting vulnerabilities within the simd-json library or its interaction with the application.
  • Why Critical: This is the top-level goal; preventing it is the core security objective.

Attack Tree Path: 1. Denial of Service (DoS) [CRITICAL]

  • Description: Attacks aimed at making the application unavailable to legitimate users. This is achieved by overwhelming the application or simd-json with malicious input, causing it to crash or become unresponsive.
  • Why Critical: DoS attacks directly impact the availability of the service, a fundamental security property.

Attack Tree Path: 2. Arbitrary Code Execution (ACE) [CRITICAL]

  • Description: The most severe outcome, where the attacker gains the ability to execute arbitrary code on the system running the application. This grants the attacker full control.
  • Why Critical: ACE represents a complete compromise of the system's security.

Attack Tree Path: 1.1 Crafted Input Causing Excessive Memory Allocation [HIGH RISK]

  • Description: This category encompasses attacks that exploit the way simd-json (and the application) handles memory allocation when parsing JSON. The attacker crafts specific JSON input designed to consume excessive memory, leading to a denial of service.
  • Why High Risk: These attacks are relatively easy to execute and have a high probability of success if the application lacks proper input validation.

Attack Tree Path: 1.1.1 Extremely Deeply Nested JSON [HIGH RISK]

  • Description: The attacker provides a JSON document with an extremely large number of nested arrays or objects (e.g., [[[[...]]]]}). simd-json might use recursive functions or a stack to process these nested structures. Excessive nesting can lead to a stack overflow or exhaust available memory.
  • Likelihood: Medium
  • Impact: High (DoS)
  • Effort: Low
  • Skill Level: Beginner
  • Detection Difficulty: Medium

Attack Tree Path: 1.1.2 Extremely Large String/Number Values [HIGH RISK]

  • Description: The attacker includes very long strings or extremely large numerical values within the JSON (e.g., a string with millions of characters, or a number close to the maximum representable value). Even with optimized parsing, these large values can consume significant memory during processing.
  • Likelihood: Medium
  • Impact: High (DoS)
  • Effort: Low
  • Skill Level: Beginner
  • Detection Difficulty: Medium

Attack Tree Path: 1.1.3 Large Number of Keys in an Object [HIGH RISK]

  • Description: The attacker creates a JSON object with an exceptionally large number of keys (e.g., an object with tens of thousands of key-value pairs). simd-json likely uses internal data structures (e.g., hash tables) to represent objects, and a huge number of keys can lead to excessive memory allocation for these structures.
  • Likelihood: Medium
  • Impact: High (DoS)
  • Effort: Low
  • Skill Level: Beginner
  • Detection Difficulty: Medium