CVE-2022-22888
📋 TL;DR
CVE-2022-22888 is a stack overflow vulnerability in Jerryscript 3.0.0's ecma_op_object_find_own function 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. Attackers can exploit this by providing specially crafted JavaScript input to trigger the overflow.
💻 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
Denial of service causing application crashes or instability in JavaScript execution environments.
If Mitigated
Contained crashes with proper sandboxing and memory protection mechanisms limiting impact to the affected process.
🎯 Exploit Status
Proof of concept exists in GitHub issues. Exploitation requires ability to inject or provide JavaScript to the vulnerable engine.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 3.0.0 (specifically fixed in commit 8b2c7a1)
Vendor Advisory: https://github.com/jerryscript-project/jerryscript/issues/4848
Restart Required: Yes
Instructions:
1. Update Jerryscript to version after 3.0.0. 2. Rebuild any applications using Jerryscript. 3. Restart affected services or devices.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation for JavaScript processed by Jerryscript to prevent malicious payloads.
Memory Protection Controls
linuxEnable ASLR, stack canaries, and other memory protection mechanisms at the OS level.
sysctl -w kernel.randomize_va_space=2
🧯 If You Can't Patch
- Isolate Jerryscript instances in containers or VMs 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. Review application dependencies and build configurations.Check Version:
jerry --version or check build configuration files for Jerryscript versionVerify Fix Applied:
Verify Jerryscript version is newer than 3.0.0. Check for commit 8b2c7a1 in the source code.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault crashes in Jerryscript processes
- Abnormal memory usage patterns
- Repeated JavaScript parsing errors
Network Indicators:
- Unusual JavaScript payloads sent to embedded systems
- Traffic to/from Jerryscript ports with malformed data
SIEM Query:
source="*jerryscript*" AND (event_type="crash" OR memory_usage>threshold)