CVE-2024-57052
📋 TL;DR
A session fixation vulnerability in YoudianCMS v9.5.20 and earlier allows remote attackers to escalate privileges by manipulating the sessionID parameter. This affects all YoudianCMS installations running vulnerable versions, potentially enabling unauthorized administrative access.
💻 Affected Systems
- YoudianCMS
📦 What is this software?
Youdiancms by Youdiancms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative privileges, allowing data theft, defacement, malware deployment, and lateral movement.
Likely Case
Unauthorized administrative access leading to content manipulation, user data exposure, and potential backdoor installation.
If Mitigated
Limited impact with proper session management and network segmentation, though authentication bypass remains possible.
🎯 Exploit Status
Simple HTTP request manipulation required. Public proof-of-concept available in GitHub gist.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
No official patch available. Consider upgrading to latest version if available, or implement workarounds.
🔧 Temporary Workarounds
Session Validation Enhancement
allAdd server-side session validation to prevent session fixation attacks
Modify index.php to validate sessionID against server-side session store before granting privileges
Input Sanitization
allSanitize sessionID parameter to prevent manipulation
Add input validation for sessionID parameter in index.php to reject malformed or suspicious values
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block requests with manipulated sessionID parameters
- Restrict network access to CMS administration interface using IP whitelisting
🔍 How to Verify
Check if Vulnerable:
Check if YoudianCMS version is 9.5.20 or earlier. Test by attempting session fixation via sessionID parameter manipulation.Check Version:
Check CMS version in admin panel or review source code version markersVerify Fix Applied:
Verify that sessionID parameter manipulation no longer allows privilege escalation. Test authentication bypass attempts.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful admin access with unusual sessionIDs
- Requests with manipulated sessionID parameters in access logs
Network Indicators:
- HTTP requests to index.php with sessionID parameter containing unusual values or patterns
SIEM Query:
source="web_logs" AND uri="*index.php*" AND (sessionID="*admin*" OR sessionID="*1=1*" OR sessionID LENGTH > 32)