CVE-2023-26106
📋 TL;DR
This vulnerability in the dot-lens JavaScript package allows attackers to perform prototype pollution attacks via the set() function. This can enable modification of object prototypes, potentially leading to denial of service, remote code execution, or privilege escalation. Any application using dot-lens is affected.
💻 Affected Systems
- dot-lens
📦 What is this software?
Dot Lens by Dot Lens Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or lateral movement within the network.
Likely Case
Denial of service, application crashes, or unauthorized modification of application behavior and data.
If Mitigated
Limited impact with proper input validation and security controls, potentially only causing application instability.
🎯 Exploit Status
Exploitation requires user input to reach the vulnerable set() function, which is common in web applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://github.com/jb55/dot-lens
Restart Required: No
Instructions:
No official patch available. Remove or replace dot-lens with alternative packages.
🔧 Temporary Workarounds
Input validation and sanitization
allImplement strict input validation to prevent malicious payloads from reaching the set() function.
Use Object.freeze() on prototypes
allFreeze Object.prototype to prevent prototype pollution attacks.
Object.freeze(Object.prototype);
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all user inputs.
- Use web application firewalls (WAF) with prototype pollution detection rules.
🔍 How to Verify
Check if Vulnerable:
Check package.json for dot-lens dependency and review code for usage of set() function with user input.Check Version:
npm list dot-lensVerify Fix Applied:
Verify dot-lens is removed from dependencies and no longer imported in code.📡 Detection & Monitoring
Log Indicators:
- Unusual application crashes
- Unexpected prototype modifications in logs
Network Indicators:
- HTTP requests with malicious payloads targeting set() function
SIEM Query:
search for 'dot-lens' in application logs combined with error patterns