CVE-2022-22893
📋 TL;DR
CVE-2022-22893 is a stack overflow vulnerability in Jerryscript 3.0.0's VM component that allows attackers to execute arbitrary code or cause denial of service. This affects any application or device using the vulnerable Jerryscript JavaScript engine version. The vulnerability is triggered through specially crafted JavaScript input.
💻 Affected Systems
- Jerryscript JavaScript engine
📦 What is this software?
Jerryscript by Jerryscript
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Application crash causing denial of service, potentially disrupting dependent services or devices.
If Mitigated
Limited impact with proper input validation and memory protection mechanisms in place.
🎯 Exploit Status
The GitHub issue includes technical details that could facilitate exploitation. Stack overflow vulnerabilities in scripting engines are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 3.0.0 (check latest release)
Vendor Advisory: https://github.com/jerryscript-project/jerryscript/issues/4901
Restart Required: Yes
Instructions:
1. Check current Jerryscript version. 2. Update to latest Jerryscript release. 3. Rebuild and redeploy any applications using Jerryscript. 4. Restart affected services.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation and sanitization for JavaScript processed by Jerryscript
Memory Protection
linuxEnable stack protection mechanisms like ASLR and stack canaries if available
echo 2 > /proc/sys/kernel/randomize_va_space
🧯 If You Can't Patch
- Isolate Jerryscript instances in containers or sandboxes with minimal privileges
- Implement network segmentation to limit access to vulnerable systems
🔍 How to Verify
Check if Vulnerable:
Check if Jerryscript version is exactly 3.0.0 in your application dependencies or embedded codeCheck Version:
Check build configuration or dependency files for 'jerryscript 3.0.0'Verify Fix Applied:
Verify Jerryscript version is updated beyond 3.0.0 and test with known malicious JavaScript samples📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Unusual memory usage patterns
- Stack overflow error messages
Network Indicators:
- Unusual JavaScript payloads being sent to applications using Jerryscript
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "stack overflow") AND process="*jerry*"