CVE-2024-34093
📋 TL;DR
This vulnerability in Archer Platform 6 allows unauthenticated attackers to bypass IP whitelisting controls when the X-Forwarded-For header is enabled. Attackers can potentially access restricted resources by spoofing trusted IP addresses. Organizations using Archer Platform 6 before version 2024.03 are affected.
💻 Affected Systems
- Archer Platform
📦 What is this software?
Archer by Archerirm
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to sensitive Archer Platform data and functionality, potentially leading to data theft, privilege escalation, or further system compromise.
Likely Case
Unauthorized access to restricted areas of the Archer Platform, potentially exposing sensitive business data or enabling further reconnaissance.
If Mitigated
Limited impact with proper network segmentation and additional authentication layers, though whitelisting bypass remains possible.
🎯 Exploit Status
Exploitation requires knowledge of whitelisted IP addresses and the ability to send HTTP requests with manipulated headers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.03 or later
Vendor Advisory: https://www.archerirm.community/t5/platform-announcements/archer-update-for-multiple-vulnerabilities/ta-p/720963
Restart Required: Yes
Instructions:
1. Download Archer Platform 2024.03 or later from official sources. 2. Follow Archer upgrade documentation. 3. Apply the update to all affected instances. 4. Restart Archer services.
🔧 Temporary Workarounds
Disable X-Forwarded-For Header Processing
allDisable or restrict processing of X-Forwarded-For headers in Archer configuration or at the reverse proxy/load balancer level.
Configuration changes depend on deployment architecture. Consult Archer documentation for header processing settings.
Implement Additional IP Validation
allAdd secondary IP validation at the network perimeter or application firewall level.
Configure WAF or firewall rules to validate client IP addresses independently of X-Forwarded-For headers.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Archer instances from untrusted networks.
- Deploy a Web Application Firewall (WAF) with rules to detect and block suspicious X-Forwarded-For header manipulation.
🔍 How to Verify
Check if Vulnerable:
Check Archer Platform version via Archer Control Panel or administrative interface. Versions before 2024.03 are vulnerable.Check Version:
Check via Archer administrative interface or consult Archer documentation for version query commands specific to your deployment.Verify Fix Applied:
Confirm version is 2024.03 or later and test X-Forwarded-For header manipulation attempts are properly rejected.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts from unexpected IP addresses
- Access logs showing IP address mismatches between client IP and X-Forwarded-For values
Network Indicators:
- HTTP requests with manipulated X-Forwarded-For headers targeting Archer endpoints
- Traffic from unexpected sources accessing whitelisted resources
SIEM Query:
source="archer_logs" AND (http_header="X-Forwarded-For" AND client_ip!=x_forwarded_for_value) OR (authentication_failure AND ip NOT IN whitelist)