CVE-2024-29684
📋 TL;DR
DedeCMS v5.7 contains a CSRF vulnerability in the makehtml_homepage.php component that allows attackers to trick authenticated administrators into executing arbitrary code. This affects all DedeCMS v5.7 installations with default configurations. Attackers can achieve remote code execution through forged requests.
💻 Affected Systems
- DedeCMS
📦 What is this software?
Dedecms by Dedecms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the web server, data theft, defacement, and lateral movement to internal networks.
Likely Case
Website defacement, data manipulation, installation of backdoors, and potential credential theft from the compromised CMS.
If Mitigated
Attack fails due to CSRF tokens, same-origin policies, or administrator not being logged in during attack attempt.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated admin into clicking malicious link. The vulnerability itself is straightforward to exploit once the admin is tricked.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check DedeCMS official website for security updates. 2. If patch available, download and apply following vendor instructions. 3. Verify fix by testing CSRF protection on makehtml_homepage.php endpoint.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd anti-CSRF tokens to the makehtml_homepage.php form and validate them on submission.
Modify /src/dede/makehtml_homepage.php to include CSRF token generation and validation
Restrict Access
allRestrict access to the vulnerable endpoint using IP whitelisting or additional authentication.
Add .htaccess rules or web server configuration to restrict /src/dede/makehtml_homepage.php
🧯 If You Can't Patch
- Implement strict SameSite cookie policies and require re-authentication for sensitive actions.
- Use web application firewall (WAF) rules to detect and block CSRF attempts targeting this endpoint.
🔍 How to Verify
Check if Vulnerable:
Check if your DedeCMS version is v5.7 and examine /src/dede/makehtml_homepage.php for CSRF protection mechanisms.Check Version:
Check DedeCMS version in admin panel or examine /data/common.inc.php for version informationVerify Fix Applied:
Test the endpoint with forged requests to confirm CSRF tokens are properly validated.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /src/dede/makehtml_homepage.php from unexpected referrers
- Multiple failed CSRF token validations
Network Indicators:
- HTTP requests to makehtml_homepage.php with missing or invalid referrer headers
- Suspicious outbound connections following successful exploitation
SIEM Query:
source="web_server" AND (uri="/src/dede/makehtml_homepage.php" AND method="POST") AND (referrer NOT CONTAINS "yourdomain.com" OR referrer="-")