CVE-2024-28713
📋 TL;DR
This vulnerability in Mblog Blog system v3.5.0 allows remote attackers to execute arbitrary code by uploading a specially crafted file through the theme management feature. This affects all users running the vulnerable version of Mblog Blog system. The attacker can gain complete control over the affected system.
💻 Affected Systems
- Mblog Blog system
📦 What is this software?
Mblog by Mtons
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary commands, steal data, install malware, or pivot to other systems in the network.
Likely Case
Attacker gains web server privileges, defaces website, steals database credentials, and establishes persistent backdoor access.
If Mitigated
Attack prevented through proper file upload validation and access controls, limiting impact to failed upload attempts.
🎯 Exploit Status
Exploitation requires access to theme management feature, typically requiring administrative privileges. The GitHub references show proof-of-concept images demonstrating the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://mblog.com
Restart Required: No
Instructions:
1. Check official Mblog website for security updates
2. Monitor the Gitee repository for patches
3. Apply any available security updates immediately
🔧 Temporary Workarounds
Disable Theme Management
allTemporarily disable or restrict access to the theme management feature
# Modify application configuration to disable theme uploads
# Restrict admin panel access to trusted IPs only
Implement File Upload Restrictions
allAdd server-side validation for file uploads in theme management
# Configure web server to block execution of uploaded files
# Implement file type validation and size limits
🧯 If You Can't Patch
- Implement strict network segmentation and isolate the Mblog instance
- Deploy a Web Application Firewall (WAF) with rules to detect and block file upload exploits
🔍 How to Verify
Check if Vulnerable:
Check if running Mblog v3.5.0 by examining version information in admin panel or application files.Check Version:
# Check Mblog version in admin panel or look for version information in application configuration filesVerify Fix Applied:
Verify version has been updated beyond v3.5.0 or test theme upload functionality with malicious files to confirm blocking.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to theme directory
- Multiple failed upload attempts
- Execution of unexpected files in upload directories
Network Indicators:
- HTTP POST requests to theme upload endpoints with suspicious file extensions
- Outbound connections from web server to unknown IPs
SIEM Query:
source="web_server" AND (uri="/admin/theme/upload" OR uri CONTAINS "theme") AND (file_extension="php" OR file_extension="jsp" OR file_extension="asp")🔗 References
- http://mblog.com
- https://gitee.com/mtons/mblog
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%871.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%872.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%873.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%874.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%875.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/Mblog%20blog%20system%20has%20SSTI%20template%20injection%20vulnerability.md
- http://mblog.com
- https://gitee.com/mtons/mblog
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%871.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%872.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%873.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%874.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/%E5%9B%BE%E7%89%875.png
- https://github.com/JiangXiaoBaiJia/cve/blob/main/Mblog%20blog%20system%20has%20SSTI%20template%20injection%20vulnerability.md
- https://www.vicarius.io/vsociety/posts/ssti-in-mblog-351-a-tale-of-a-glorified-rce-cve-2024-28713-28714
