CVE-2020-36376
📋 TL;DR
This vulnerability in aaptjs 1.3.1 allows attackers to execute arbitrary code via the filePath parameter in the list function. It affects systems using the vulnerable version of aaptjs, particularly those processing untrusted input through this function. The high CVSS score indicates critical severity with potential for complete system compromise.
💻 Affected Systems
- aaptjs
📦 What is this software?
Aaptjs by Aaptjs Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the affected system, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Remote code execution allowing attackers to run arbitrary commands on the server, potentially leading to data exfiltration, service disruption, or installation of backdoors.
If Mitigated
Limited impact if proper input validation and sandboxing are implemented, potentially reducing to denial of service or information disclosure.
🎯 Exploit Status
The GitHub issue shows exploitation details. The vulnerability is in a widely used parameter with straightforward exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub repository for updates
Vendor Advisory: https://github.com/shenzhim/aaptjs/issues/2
Restart Required: Yes
Instructions:
1. Check current aaptjs version. 2. Update to latest version from official repository. 3. Restart any services using aaptjs. 4. Validate fix by testing with safe input.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation on filePath parameter to prevent command injection
Implement regex validation: ^[a-zA-Z0-9._\/-]+$
Use allowlist approach for file paths
Sandbox Execution
linuxRun aaptjs in restricted environment with minimal privileges
Use Docker containers with read-only filesystems
Implement SELinux/AppArmor policies
🧯 If You Can't Patch
- Implement network segmentation to isolate systems using aaptjs
- Deploy web application firewall with command injection rules
🔍 How to Verify
Check if Vulnerable:
Check package.json or version output for aaptjs 1.3.1Check Version:
npm list aaptjs or check package.json versionVerify Fix Applied:
Test with controlled input to ensure command injection is prevented📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- File path parameters containing shell metacharacters
- Unexpected process spawns from aaptjs
Network Indicators:
- Outbound connections from aaptjs process to unexpected destinations
- Command and control traffic patterns
SIEM Query:
process.name:aaptjs AND (cmdline:*;* OR cmdline:*&* OR cmdline:*|* OR cmdline:*`*)