CVE-2024-57548
📋 TL;DR
CMSimple 5.16 contains a broken access control vulnerability that allows authenticated users to edit the log.php file via the print page functionality. This affects all installations of CMSimple 5.16 where users have edit permissions. The vulnerability enables unauthorized file modification that could lead to further system compromise.
💻 Affected Systems
- CMSimple
📦 What is this software?
Cmsimple by Cmsimple
⚠️ Risk & Real-World Impact
Worst Case
An attacker could modify log.php to execute arbitrary code, leading to complete system takeover, data theft, or ransomware deployment.
Likely Case
Authenticated users could modify system files to gain elevated privileges, deface websites, or disrupt logging functionality.
If Mitigated
With proper access controls and file permissions, impact is limited to authorized users making unintended changes to logging files.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once authenticated. Public proof-of-concept demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Restrict access to log.php
linuxModify file permissions to prevent unauthorized editing of log.php
chmod 644 log.php
chown root:www-data log.php
Disable print page functionality
allRemove or disable the print page feature that allows access to log.php
# Remove or comment out print page functionality in CMSimple configuration
🧯 If You Can't Patch
- Implement strict access controls and limit user permissions to only necessary functions
- Monitor file modification events on log.php and implement file integrity monitoring
🔍 How to Verify
Check if Vulnerable:
Check if CMSimple version is 5.16 and test if authenticated users can edit log.php via print page functionalityCheck Version:
Check CMSimple configuration files or admin panel for version informationVerify Fix Applied:
Verify that authenticated users can no longer edit log.php through the print page interface📡 Detection & Monitoring
Log Indicators:
- Unauthorized modifications to log.php file
- Multiple failed access attempts to log.php
Network Indicators:
- Unusual HTTP requests to print page functionality with log.php parameters
SIEM Query:
source="web_server" AND (uri="*log.php*" OR uri="*print*" AND method="POST")