Skip to content

Latest commit

 

History

History
75 lines (53 loc) · 7.28 KB

attack-tree.md

File metadata and controls

75 lines (53 loc) · 7.28 KB

Attack Tree Analysis for flexmonkey/blurable

Objective: Compromise Application via Blurable Library Exploitation

Attack Tree Visualization

Attack Goal: Compromise Application via Blurable Library Exploitation [CRITICAL NODE] ├───[AND] Exploit Blurable Library Weaknesses [CRITICAL NODE] │ ├───[OR] 1. Input Manipulation Attacks (Malicious Image URL) [CRITICAL NODE] [HIGH-RISK PATH - SSRF & Large Image] │ │ ├─── 1.1. Server-Side Request Forgery (SSRF) via URL (If Application fetches image server-side) [CRITICAL NODE] [HIGH-RISK PATH] │ │ │ └─── Action: Provide URL pointing to internal resources or external malicious servers. │ │ ├─── 1.3. Large Image/DoS (Client-Side) [HIGH-RISK PATH - DoS] │ │ │ └─── Action: Provide URL to extremely large image to exhaust client-side resources (CPU, memory). │ ├───[OR] 2. Resource Exhaustion Attacks (Client-Side DoS) [HIGH-RISK PATH - DoS] │ │ ├─── 2.1. CPU/Memory Exhaustion via Repeated Blurring [HIGH-RISK PATH - DoS] │ │ │ └─── Action: Repeatedly trigger blurring function with large images or high blur radius to overload client CPU/memory. │ ├───[OR] 3. Client-Side Vulnerabilities due to Blurable Usage (Indirect) [CRITICAL NODE] [HIGH-RISK PATH - XSS] │ │ ├─── 3.1. Context-Dependent XSS via Unsafe Handling of Blurable Output (Application-Side Issue) [CRITICAL NODE] [HIGH-RISK PATH - XSS] │ │ │ └─── Action: If application displays or processes blurred image URL or related data without proper sanitization, inject malicious content that gets executed in user's browser. (Less directly Blurable's fault, but related to its usage).

Attack Tree Path: Attack Goal: Compromise Application via Blurable Library Exploitation [CRITICAL NODE]

This is the ultimate objective of the attacker. Success means gaining unauthorized access, control, or causing harm to the application utilizing the blurable library.

Attack Tree Path: Exploit Blurable Library Weaknesses [CRITICAL NODE]

This represents the attacker's primary strategy: to find and leverage vulnerabilities or weaknesses specifically related to the blurable library or its integration within the application.

Attack Tree Path: Input Manipulation Attacks (Malicious Image URL) [CRITICAL NODE] [HIGH-RISK PATH - SSRF & Large Image]

This category focuses on attacks that manipulate the input provided to the blurable library, specifically the image URL. It's a critical node because it's a direct and easily accessible attack surface.

  • High-Risk Path - SSRF & Large Image: This path groups the most concerning input manipulation attacks due to their likelihood and potential impact.

Attack Tree Path: Server-Side Request Forgery (SSRF) via URL (If Application fetches image server-side) [CRITICAL NODE] [HIGH-RISK PATH]

  • Attack Vector:
    • If the application fetches the image from the provided URL on the server-side before client-side blurring, an attacker can provide a malicious URL.
    • This URL can target internal resources within the application's infrastructure (e.g., internal services, databases).
    • It can also target external malicious servers to exfiltrate data or conduct further attacks.
  • Impact: High - Potential access to sensitive internal resources, data breaches, and further exploitation of the server-side infrastructure.

Attack Tree Path: Large Image/DoS (Client-Side) [HIGH-RISK PATH - DoS]

  • Attack Vector:
    • An attacker provides a URL pointing to an extremely large image file.
    • When blurable attempts to process this large image, it can exhaust client-side resources (CPU, memory).
    • This leads to a client-side Denial of Service (DoS), making the application unresponsive or crashing the browser tab for the user.
  • Impact: Low to Medium - Client-side DoS, browser tab crash, temporary disruption for individual users. While not a full application compromise, it degrades user experience and can be used in conjunction with other attacks.

Attack Tree Path: Resource Exhaustion Attacks (Client-Side DoS) [HIGH-RISK PATH - DoS]

This category focuses on attacks that aim to exhaust client-side resources, leading to a Denial of Service.

  • High-Risk Path - DoS: This path highlights the risk of client-side DoS attacks, which are relatively easy to execute.

Attack Tree Path: CPU/Memory Exhaustion via Repeated Blurring [HIGH-RISK PATH - DoS]

  • Attack Vector:
    • An attacker repeatedly triggers the blurring function of blurable.
    • This can be done by repeatedly interacting with the application or through automated scripts.
    • Repeated blurring, especially with large images or high blur radius, can quickly overload the client's CPU and memory.
  • Impact: Low to Medium - Client-side DoS, browser tab unresponsiveness, temporary disruption for individual users. Similar to large image DoS, it impacts user experience and can be part of a broader attack strategy.

Attack Tree Path: Client-Side Vulnerabilities due to Blurable Usage (Indirect) [CRITICAL NODE] [HIGH-RISK PATH - XSS]

This category highlights vulnerabilities that are not directly within blurable itself, but arise from how the application uses the library and handles related data. It's a critical node because application-side vulnerabilities are common and often overlooked.

  • High-Risk Path - XSS: This path focuses on Cross-Site Scripting (XSS) vulnerabilities, which are a significant risk due to their potential for full client-side compromise.

Attack Tree Path: Context-Dependent XSS via Unsafe Handling of Blurable Output (Application-Side Issue) [CRITICAL NODE] [HIGH-RISK PATH - XSS]

  • Attack Vector:
    • If the application displays or processes the input URL used for blurring, or any related data, without proper sanitization (output encoding).
    • An attacker can craft a malicious URL containing JavaScript code.
    • When the application displays this unsanitized URL, the malicious JavaScript code will be executed in the user's browser.
  • Impact: High - Full client-side compromise, including session hijacking, cookie theft, data theft, defacement of the webpage, and redirection to malicious sites. XSS is a severe vulnerability that can have significant consequences.