CVE-2024-34091
📋 TL;DR
A stored cross-site scripting (XSS) vulnerability in Archer Platform 6 allows authenticated attackers to inject malicious HTML/JavaScript into the application's data store. When other users access the compromised data, the malicious code executes in their browsers, potentially disrupting application functionality. This affects authenticated Archer users with access to vulnerable versions.
💻 Affected Systems
- Archer Platform
📦 What is this software?
Archer by Archerirm
Archer by Archerirm
⚠️ Risk & Real-World Impact
Worst Case
Malicious actors could execute arbitrary JavaScript in victims' browsers, potentially stealing session cookies, performing actions as the victim, or rendering the application unusable through denial-of-service attacks.
Likely Case
Attackers with authenticated access could inject malicious scripts that execute when other users view compromised data, leading to session hijacking, data theft, or application disruption.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution, preventing successful exploitation.
🎯 Exploit Status
Exploitation requires authenticated access to the Archer application; stored XSS typically has low technical complexity once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.04 or 6.14 P3 (6.14.0.3)
Vendor Advisory: https://www.archerirm.community/t5/platform-announcements/archer-update-for-multiple-vulnerabilities/ta-p/720963
Restart Required: Yes
Instructions:
1. Download the appropriate patch from RSA Archer support portal. 2. Follow Archer Platform upgrade procedures. 3. Apply the patch to all affected instances. 4. Restart application services. 5. Verify successful update.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation and output encoding for user-supplied data in Archer custom applications
N/A - Requires code modifications
Content Security Policy
allImplement strict Content Security Policy headers to mitigate XSS impact
Add CSP headers via web server configuration or application settings
🧯 If You Can't Patch
- Implement strict access controls to limit which users can modify application data
- Deploy web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check Archer Platform version via Admin Console > System > About or via Archer APICheck Version:
N/A - Check via Archer web interface or administrative toolsVerify Fix Applied:
Verify version is 2024.04 or 6.14.0.3 or later; test XSS payloads are properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual data modification patterns
- Suspicious HTML/JavaScript in user input logs
- Multiple failed XSS attempts
Network Indicators:
- Unusual outbound connections from Archer servers
- Suspicious JavaScript execution patterns
SIEM Query:
source="archer" AND (event_type="data_modification" OR event_type="user_input") AND (message="*script*" OR message="*javascript*")