CVE-2024-6426
📋 TL;DR
This vulnerability in MESbook 20221021.03 allows a local attacker with user privileges to access unauthorized resources by manipulating API values. It affects users of the MESbook software who have local access to the system. The exposure could lead to unauthorized information disclosure.
💻 Affected Systems
- MESbook
📦 What is this software?
Mesbook by Mesbook
⚠️ Risk & Real-World Impact
Worst Case
An attacker could access sensitive data, configuration files, or system resources beyond their intended permissions, potentially leading to data theft or privilege escalation.
Likely Case
Local users accessing data they shouldn't have permission to view, such as other users' information or system configuration details.
If Mitigated
With proper access controls and monitoring, the impact is limited to unauthorized data viewing within the local environment.
🎯 Exploit Status
Exploitation requires local access and user privileges. The attacker manipulates API values to access different resources.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references, check vendor for latest version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso-sci/multiple-vulnerabilities-mesbook
Restart Required: Yes
Instructions:
1. Contact MESbook vendor for patched version. 2. Backup current configuration. 3. Apply vendor-provided patch or upgrade to fixed version. 4. Restart the application/service. 5. Verify the fix is applied.
🔧 Temporary Workarounds
Restrict Local Access
allLimit local user access to systems running MESbook to only authorized personnel
API Input Validation
allImplement additional input validation for API parameters if source code access is available
🧯 If You Can't Patch
- Implement strict access controls to limit which users can access the MESbook system
- Monitor API access logs for unusual parameter values or access patterns
🔍 How to Verify
Check if Vulnerable:
Check if running MESbook version 20221021.03. Review API access logs for parameter manipulation attempts.Check Version:
Check application settings or configuration files for version information (specific command depends on installation)Verify Fix Applied:
Verify the installed version is newer than 20221021.03. Test API parameter manipulation to confirm access controls are working.📡 Detection & Monitoring
Log Indicators:
- Unusual API parameter values
- Access to resources outside normal user patterns
- Failed authorization attempts with manipulated parameters
Network Indicators:
- Local API calls with unexpected parameter values
SIEM Query:
source="mesbook" AND (parameter_value CONTAINS suspicious_pattern OR resource_access OUTSIDE normal_pattern)