Attack Surface: 1. WebGL Context Exploitation
- Description: Exploits vulnerabilities in the browser's WebGL implementation or underlying graphics drivers through crafted PixiJS content.
- How PixiJS Contributes: PixiJS is the direct interface to WebGL, making it the conduit for triggering these vulnerabilities. The attacker's code interacts directly with PixiJS APIs to reach WebGL.
- Example: A specially crafted shader or texture, loaded via PixiJS, triggers a known driver bug, leading to a browser crash or potentially worse.
- Impact: Denial of Service (DoS), potential Information Disclosure, rarely Arbitrary Code Execution.
- Risk Severity: High (DoS is common, Code Execution is rare but severe).
- Mitigation Strategies:
- Developers: Sanitize user-provided data influencing rendering (texture dimensions, shader code). Implement WebGL context loss handling.
- Users: Keep browsers and graphics drivers updated.
Attack Surface: 2. Malicious Texture/Resource Loading
- Description: Exploits vulnerabilities in image/video decoding libraries by loading maliciously crafted files through PixiJS.
- How PixiJS Contributes: PixiJS directly handles the loading and processing of these resources; the attack vector is the PixiJS resource loading mechanism itself.
- Example: An attacker uploads a specially crafted PNG image that exploits a vulnerability in the browser's PNG decoder when PixiJS's
Texture.from()or loader functions are used to load it. - Impact: Denial of Service (DoS), rarely Arbitrary Code Execution.
- Risk Severity: High (DoS is common, Code Execution is rare but severe).
- Mitigation Strategies:
- Developers: Validate image/video dimensions and formats before loading via PixiJS. Use a strict Content Security Policy (CSP) for resource origins. Strongly consider server-side image/video sanitization and resizing.
- Users: Keep browsers updated.
Attack Surface: 3. Custom Shader Injection (If Allowed)
- Description: If the application allows user-provided WebGL shaders (GLSL code), this opens a significant vulnerability directly through PixiJS.
- How PixiJS Contributes: PixiJS directly compiles and executes these user-provided shaders. This is a core functionality of PixiJS being misused.
- Example: An attacker submits a shader containing an infinite loop, freezing the GPU and causing a denial of service. More sophisticated attacks could attempt to exploit driver vulnerabilities, all triggered through PixiJS's shader handling.
- Impact: Denial of Service (DoS), potential Information Disclosure, rarely Arbitrary Code Execution.
- Risk Severity: Critical (if user-provided shaders are allowed).
- Mitigation Strategies:
- Developers: Avoid allowing user-provided shaders if at all possible. If unavoidable, implement extremely strict validation, sandboxing (Web Workers), time limits, and potentially server-side compilation/validation. Use a GLSL validator.