CVE-2024-41432
📋 TL;DR
This CVE describes an IP spoofing vulnerability in Likeshop that allows attackers to forge X-Forwarded or Client-IP headers to bypass IP-based security controls. Attackers can circumvent admin account lockouts, spoof IP addresses in requests, and impersonate legitimate users. All Likeshop installations up to version 2.5.7.20210811 are affected.
💻 Affected Systems
- Likeshop
📦 What is this software?
Likeshop by Likeshop
⚠️ Risk & Real-World Impact
Worst Case
Attackers could brute-force admin credentials without triggering account lockouts, gain unauthorized admin access, and perform actions while appearing as legitimate users or internal IP addresses.
Likely Case
Attackers bypass IP-based rate limiting and account lockouts to conduct credential stuffing attacks against admin interfaces, potentially gaining administrative access.
If Mitigated
With proper header validation and additional authentication layers, the impact is limited to potential bypass of IP-based logging and some rate limiting mechanisms.
🎯 Exploit Status
Exploitation requires only HTTP header manipulation, making it trivial for attackers with basic knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Upgrade to a version beyond 2.5.7.20210811 if available, or implement workarounds.
🔧 Temporary Workarounds
Web Server Header Validation
allConfigure web server (Apache/Nginx) to strip or validate X-Forwarded and Client-IP headers
For Nginx: add 'proxy_set_header X-Forwarded-For $remote_addr;' in location block
For Apache: use mod_headers to validate or remove these headers
Application-Level IP Validation
allModify Likeshop code to validate IP addresses from trusted sources only
Modify IP retrieval logic to use $_SERVER['REMOTE_ADDR'] instead of HTTP headers
Implement IP validation against known proxy IPs if using reverse proxies
🧯 If You Can't Patch
- Implement network-level IP filtering and rate limiting at firewall/WAF
- Enable multi-factor authentication for all admin accounts
🔍 How to Verify
Check if Vulnerable:
Send HTTP request with forged X-Forwarded-For header to Likeshop endpoint and check if application uses the forged IPCheck Version:
Check Likeshop version in admin panel or configuration filesVerify Fix Applied:
Test with forged headers after implementing fixes - application should ignore forged headers and use actual source IP📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from same IP with different X-Forwarded headers
- Admin logins from unexpected IP ranges
Network Indicators:
- HTTP requests with X-Forwarded or Client-IP headers from untrusted sources
- Unusual header patterns in requests
SIEM Query:
sourceIP=* AND (http_header:X-Forwarded-For != sourceIP OR http_header:Client-IP != sourceIP)