CVE-2024-57728
📋 TL;DR
CVE-2024-57728 is a path traversal vulnerability in SimpleHelp remote support software that allows authenticated admin users to upload arbitrary files anywhere on the file system via crafted zip archives (zip slip). This can lead to remote code execution in the context of the SimpleHelp server user. Affected systems are SimpleHelp v5.5.7 and earlier installations.
💻 Affected Systems
- SimpleHelp Remote Support Software
📦 What is this software?
Simplehelp by Simple Help
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining persistent access, installing backdoors, stealing sensitive data, and moving laterally to other systems.
Likely Case
Attacker gains initial foothold on the server, executes arbitrary commands, and establishes persistence for further attacks.
If Mitigated
Attack limited to file system access within SimpleHelp's context if proper network segmentation and least privilege are implemented.
🎯 Exploit Status
Requires admin credentials and ability to craft malicious zip files. No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v5.5.8 or later
Vendor Advisory: https://simple-help.com/kb---security-vulnerabilities-01-2025#security-vulnerabilities-in-simplehelp-5-5-7-and-earlier
Restart Required: No
Instructions:
1. Download SimpleHelp v5.5.8 or later from vendor website. 2. Backup current installation. 3. Install the updated version following vendor instructions. 4. Verify successful update.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit admin user accounts to only trusted personnel and implement strong authentication controls.
Network Segmentation
allPlace SimpleHelp server in isolated network segment with restricted inbound/outbound access.
🧯 If You Can't Patch
- Implement strict access controls and monitor all admin user activities
- Deploy file integrity monitoring on SimpleHelp installation directories
🔍 How to Verify
Check if Vulnerable:
Check SimpleHelp version in admin interface or installation directory. Versions 5.5.7 and earlier are vulnerable.Check Version:
Check SimpleHelp admin web interface or examine version.txt in installation directoryVerify Fix Applied:
Verify version is 5.5.8 or later in admin interface. Test file upload functionality with safe test files.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activities by admin users
- File writes outside expected SimpleHelp directories
- Suspicious process execution from SimpleHelp context
Network Indicators:
- Unusual outbound connections from SimpleHelp server
- Suspicious file transfer patterns
SIEM Query:
source="simplehelp" AND (event="file_upload" OR event="admin_action") AND (file_path CONTAINS ".." OR file_path NOT CONTAINS "expected_path")