CVE-2020-28282
📋 TL;DR
CVE-2020-28282 is a prototype pollution vulnerability in the 'getobject' npm package version 0.1.0 that allows attackers to modify JavaScript object prototypes. This can lead to denial of service, property injection, and potentially remote code execution in applications using this vulnerable library. Any Node.js application using 'getobject' version 0.1.0 is affected.
💻 Affected Systems
- getobject npm package
📦 What is this software?
Getobject by Getobject Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and lateral movement within the network.
Likely Case
Denial of service through application crashes or unexpected behavior, with potential for property injection attacks.
If Mitigated
Limited impact if proper input validation and sandboxing are implemented, though prototype pollution remains dangerous.
🎯 Exploit Status
Prototype pollution vulnerabilities are well-understood and relatively easy to exploit with available proof-of-concept code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.1.1 and later
Vendor Advisory: https://github.com/cowboy/node-getobject/security/advisories
Restart Required: Yes
Instructions:
1. Update package.json to require 'getobject' version 0.1.1 or later. 2. Run 'npm update getobject' or 'yarn upgrade getobject'. 3. Restart your Node.js application.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation for all user-controlled data passed to getobject functions
Object.freeze() on Prototypes
allFreeze Object.prototype and other base prototypes to prevent pollution
Object.freeze(Object.prototype);
Object.freeze(Object);
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to detect and block prototype pollution patterns
- Isolate affected applications in network segments with strict egress filtering
🔍 How to Verify
Check if Vulnerable:
Check package.json or run 'npm list getobject' to see if version 0.1.0 is installedCheck Version:
npm list getobject | grep getobjectVerify Fix Applied:
Verify 'npm list getobject' shows version 0.1.1 or later, then test application functionality📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Unusual property assignments in object logs
- Error messages related to prototype modifications
Network Indicators:
- HTTP requests with specially crafted JSON/object payloads
- Unusual outbound connections from Node.js processes
SIEM Query:
source="application.log" AND ("prototype" OR "__proto__" OR "constructor") AND ("error" OR "crash")🔗 References
- https://github.com/cowboy/node-getobject/blob/aba04a8e1d6180eb39eff09990c3a43886ba8937/lib/getobject.js#L48
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28282
- https://github.com/cowboy/node-getobject/blob/aba04a8e1d6180eb39eff09990c3a43886ba8937/lib/getobject.js#L48
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28282
