CVE-2024-34246
📋 TL;DR
CVE-2024-34246 is an out-of-bounds memory read vulnerability in wasm3 v0.5.0 that can cause segmentation faults and potential denial of service. This affects applications using the wasm3 WebAssembly interpreter, particularly those processing untrusted WebAssembly modules. The vulnerability resides in the main function of the wasm3 platform application.
💻 Affected Systems
- wasm3
📦 What is this software?
Wasm3 by Wasm3 Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if combined with other vulnerabilities, or persistent denial of service.
Likely Case
Application crash (segmentation fault) causing denial of service for the affected process.
If Mitigated
Limited impact with proper sandboxing and input validation in place.
🎯 Exploit Status
Exploitation requires crafting a malicious WebAssembly module that triggers the out-of-bounds read. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.5.1 or later
Vendor Advisory: https://github.com/wasm3/wasm3/issues/484
Restart Required: Yes
Instructions:
1. Check current wasm3 version. 2. Update to v0.5.1 or later via package manager or source compilation. 3. Restart any services using wasm3. 4. Recompile applications that embed wasm3.
🔧 Temporary Workarounds
Input Validation
allImplement strict validation of WebAssembly modules before processing with wasm3.
Sandbox Execution
linuxRun wasm3 in a sandboxed environment with limited privileges.
docker run --read-only --cap-drop=ALL wasm3_container
🧯 If You Can't Patch
- Isolate wasm3 instances from critical systems and run with minimal privileges.
- Implement network segmentation to limit exposure of services using wasm3.
🔍 How to Verify
Check if Vulnerable:
Check if wasm3 version is exactly 0.5.0. Run: wasm3 --version or check package manager.Check Version:
wasm3 --version 2>&1 | grep -o 'v[0-9.]\+'Verify Fix Applied:
Confirm wasm3 version is 0.5.1 or later. Test with known safe WebAssembly modules to ensure stability.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault messages in system logs
- Unexpected wasm3 process termination
Network Indicators:
- Unusual WebAssembly module uploads to services using wasm3
SIEM Query:
process.name:"wasm3" AND event.action:"segmentation_fault"