CVE-2017-16020
📋 TL;DR
This vulnerability in the Summit web framework allows remote attackers to execute arbitrary commands through malicious collection names when using the PouchDB driver. It affects Summit 0.1.0 and later versions. Attackers can achieve remote code execution on vulnerable systems.
💻 Affected Systems
- Summit web framework
📦 What is this software?
Summit by Summit Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the server, allowing data theft, service disruption, and lateral movement within the network.
Likely Case
Remote code execution leading to data exfiltration, installation of backdoors, or cryptocurrency mining malware.
If Mitigated
No impact if proper input validation and sanitization are implemented, or if vulnerable versions are not deployed.
🎯 Exploit Status
Exploitation is straightforward once the vulnerable endpoint is identified. The vulnerability is well-documented in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to Summit 0.1.1 or later
Vendor Advisory: https://github.com/notduncansmith/summit/issues/23
Restart Required: Yes
Instructions:
1. Check current Summit version. 2. Run 'npm update summit' to update to latest version. 3. Restart the Summit application. 4. Verify the update was successful.
🔧 Temporary Workarounds
Disable PouchDB Driver
allTemporarily disable or remove the PouchDB driver if not essential for functionality
Remove or comment out PouchDB driver configuration in your Summit application
Input Validation Filter
allImplement strict input validation for collection names before processing
Add validation middleware that rejects collection names containing special characters or command sequences
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Deploy web application firewall (WAF) rules to block malicious collection name patterns
🔍 How to Verify
Check if Vulnerable:
Check package.json for Summit version. If version is 0.1.0 or higher and PouchDB driver is used, the system is vulnerable.Check Version:
npm list summit | grep summitVerify Fix Applied:
Verify Summit version is 0.1.1 or later and test collection name inputs with special characters to ensure they are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual collection names containing special characters or command sequences
- Multiple failed collection creation attempts with malformed names
- Unexpected process spawns from Summit application
Network Indicators:
- HTTP requests with suspicious collection name parameters
- Outbound connections from Summit to unexpected external IPs
SIEM Query:
source="summit_logs" AND (collection_name="*;*" OR collection_name="*|*" OR collection_name="*`*")