CVE-2024-24188
📋 TL;DR
CVE-2024-24188 is a critical heap buffer overflow vulnerability in Jsish v3.5.0 that allows attackers to execute arbitrary code or cause denial of service. This affects all systems running the vulnerable version of Jsish, a JavaScript interpreter for embedded systems. Attackers can exploit this by providing specially crafted input to trigger the overflow.
💻 Affected Systems
- Jsish
📦 What is this software?
Jsish by Jsish
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Denial of service causing application crashes and service disruption.
If Mitigated
Limited impact if proper memory protections (ASLR, DEP) are enabled and input validation is in place.
🎯 Exploit Status
The GitHub issue contains technical details that could be used to create exploits. Heap buffer overflows are well-understood attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.5.1 or later
Vendor Advisory: https://github.com/pcmacdon/jsish/issues/100
Restart Required: Yes
Instructions:
1. Check current version with 'jsish -v'. 2. Download latest version from GitHub. 3. Compile and install: 'make clean && make && sudo make install'. 4. Restart any services using Jsish.
🔧 Temporary Workarounds
Input Validation Wrapper
allImplement strict input validation before passing data to Jsish interpreter
# Implement in application code: validate all inputs before jsish execution
Memory Protection
allEnable ASLR and DEP/PaX to make exploitation more difficult
# Linux: sysctl -w kernel.randomize_va_space=2
# Windows: Enable Data Execution Prevention
🧯 If You Can't Patch
- Isolate Jsish instances in containers or VMs with minimal privileges
- Implement network segmentation to limit access to vulnerable systems
🔍 How to Verify
Check if Vulnerable:
Run 'jsish -v' and check if output shows version 3.5.0Check Version:
jsish -vVerify Fix Applied:
Run 'jsish -v' and confirm version is 3.5.1 or higher📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in system logs
- Unexpected process termination of jsish
Network Indicators:
- Unusual network connections from jsish processes
- Large or malformed input to jsish endpoints
SIEM Query:
process_name:"jsish" AND (event_type:"crash" OR exit_code:139)