CVE-2020-7683
📋 TL;DR
CVE-2020-7683 is a path traversal vulnerability in rollup-plugin-server that allows attackers to read arbitrary files from the server's filesystem. This affects all versions of the package when used in development environments. The vulnerability occurs due to lack of path sanitization in the readFileFromContentBase function.
💻 Affected Systems
- rollup-plugin-server
📦 What is this software?
Rollup Plugin Server by Rollup Plugin Server Project
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers can read sensitive files like configuration files, environment variables, SSH keys, or database credentials, potentially leading to full system compromise.
Likely Case
Unauthorized file disclosure of source code, configuration files, or other sensitive data stored on the server.
If Mitigated
Limited impact with proper network segmentation and file system permissions restricting access to sensitive files.
🎯 Exploit Status
Exploitation requires network access to the development server. The vulnerability is simple to exploit with basic HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None - package is deprecated
Vendor Advisory: https://snyk.io/vuln/SNYK-JS-ROLLUPPLUGINSERVER-590123
Restart Required: Yes
Instructions:
1. Remove rollup-plugin-server from your project. 2. Use alternative development server packages like webpack-dev-server or vite. 3. Update package.json to remove the dependency. 4. Run npm uninstall rollup-plugin-server.
🔧 Temporary Workarounds
Network isolation
allRestrict access to development server to localhost only
Configure server to bind to 127.0.0.1 only
Use firewall rules to block external access
File system restrictions
linuxRun development server with minimal file system permissions
chroot the server process
Use containerization with limited volume mounts
🧯 If You Can't Patch
- Isolate development environment from production networks
- Implement strict network access controls to development servers
🔍 How to Verify
Check if Vulnerable:
Check package.json for rollup-plugin-server dependency: grep -r 'rollup-plugin-server' package.jsonCheck Version:
npm list rollup-plugin-serverVerify Fix Applied:
Verify rollup-plugin-server is not in package.json and not installed in node_modules📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in server logs
- Requests with ../ patterns in URLs
- Access to files outside expected content base
Network Indicators:
- HTTP requests with path traversal sequences to development server
SIEM Query:
source="webserver" AND (url="*../*" OR url="*..\\*" OR url="*%2e%2e%2f*") AND dest_port="development_port"