CVE-2020-36380
📋 TL;DR
CVE-2020-36380 is a critical OS command injection vulnerability in aaptjs 1.3.1 that allows attackers to execute arbitrary code by manipulating filePath parameters. This affects systems using the vulnerable aaptjs library for Android asset packaging. Attackers can achieve remote code execution with high privileges.
💻 Affected Systems
- shenzhim aaptjs
📦 What is this software?
Aaptjs by Aaptjs Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining root/administrator privileges, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Remote code execution leading to application compromise, data theft, and lateral movement within the network.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially only affecting the application process.
🎯 Exploit Status
The vulnerability is simple to exploit with publicly available details. No authentication required if the vulnerable function is exposed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.3.2 or later
Vendor Advisory: https://github.com/shenzhim/aaptjs/issues/2
Restart Required: Yes
Instructions:
1. Update aaptjs to version 1.3.2 or later using npm: npm update aaptjs. 2. Restart any applications using aaptjs. 3. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation on filePath parameters to prevent command injection.
Implement whitelist validation for file paths
Use path normalization libraries
Sandbox Execution
allRun aaptjs in a restricted environment with minimal privileges.
Use Docker containers with limited capabilities
Implement process isolation
🧯 If You Can't Patch
- Implement network segmentation to isolate systems using aaptjs
- Deploy application control to prevent execution of unauthorized commands
🔍 How to Verify
Check if Vulnerable:
Check package.json or run: npm list aaptjs | grep 1.3.1Check Version:
npm list aaptjs | grep aaptjsVerify Fix Applied:
Verify installed version is 1.3.2 or later: npm list aaptjs📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns from aaptjs process
- Suspicious file path patterns in application logs
Network Indicators:
- Unexpected outbound connections from aaptjs process
- Command and control traffic patterns
SIEM Query:
process_name:aaptjs AND (command_injection_indicators OR suspicious_child_process)