CVE-2024-40754
📋 TL;DR
A heap-based buffer overflow vulnerability in Samsung's Escargot JavaScript engine allows attackers to write beyond allocated memory boundaries. This affects any software using Escargot 4.0.0 for JavaScript execution. Successful exploitation could lead to arbitrary code execution or denial of service.
💻 Affected Systems
- Samsung Escargot JavaScript engine
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the JavaScript engine process, potentially leading to complete system compromise.
Likely Case
Application crash (denial of service) or memory corruption leading to unstable behavior.
If Mitigated
Limited impact if sandboxing or memory protection mechanisms prevent code execution.
🎯 Exploit Status
Heap overflows typically require precise memory manipulation but JavaScript engines are common attack targets.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit referenced in PR #1369
Vendor Advisory: https://github.com/Samsung/escargot/pull/1369
Restart Required: Yes
Instructions:
1. Update Escargot to version containing fix from PR #1369
2. Rebuild any applications using Escargot
3. Restart affected services
🔧 Temporary Workarounds
Disable JavaScript execution
allIf possible, disable JavaScript processing in affected applications
Memory protection
allEnable ASLR and DEP to make exploitation more difficult
🧯 If You Can't Patch
- Network segmentation to isolate vulnerable systems
- Implement strict input validation and sanitization for JavaScript content
🔍 How to Verify
Check if Vulnerable:
Check if applications use Escargot version 4.0.0Check Version:
Check application documentation or build configuration for Escargot versionVerify Fix Applied:
Verify Escargot version is updated beyond the vulnerable commit📡 Detection & Monitoring
Log Indicators:
- Application crashes
- Memory access violation errors
- Unexpected process termination
Network Indicators:
- Unusual JavaScript payloads
- Exploit kit traffic patterns
SIEM Query:
Process termination events from applications using JavaScript engines