CVE-2024-49142
📋 TL;DR
This vulnerability allows remote code execution through Microsoft Access when a user opens a specially crafted Access file. It affects users who open untrusted Access files, particularly in enterprise environments where Access is used for database applications.
💻 Affected Systems
- Microsoft Access
📦 What is this software?
365 Apps by Microsoft
Access by Microsoft
Office by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement within networks.
Likely Case
Malicious Access files delivered via phishing or downloads execute arbitrary code on victim machines, compromising individual workstations.
If Mitigated
With proper controls like application whitelisting and user training, impact is limited to isolated incidents with minimal data exposure.
🎯 Exploit Status
Exploitation requires user interaction; no known public exploits as of advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft's monthly security updates for Access patches
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49142
Restart Required: Yes
Instructions:
1. Apply latest Microsoft security updates via Windows Update. 2. For enterprise, deploy patches through WSUS or SCCM. 3. Restart systems if required by update.
🔧 Temporary Workarounds
Block Access file execution via Group Policy
windowsPrevent execution of Access files from untrusted locations using application control policies.
Configure via Windows Group Policy: Computer Configuration > Windows Settings > Security Settings > Application Control Policies
Disable macros and ActiveX controls
windowsReduce attack surface by disabling potentially dangerous features in Access.
Set via Access Trust Center: File > Options > Trust Center > Trust Center Settings
🧯 If You Can't Patch
- Restrict Access file execution to trusted directories only
- Implement user training to avoid opening untrusted Access files
🔍 How to Verify
Check if Vulnerable:
Check if Microsoft Access is installed and if security updates are missing via Windows Update history.Check Version:
In Access: File > Account > About Access shows version detailsVerify Fix Applied:
Verify patch installation in Windows Update history or by checking Access version against patched releases.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing Access crashes or unexpected process creation
- Antivirus alerts for malicious Access files
Network Indicators:
- Unusual outbound connections from Access processes
- Downloads of Access files from untrusted sources
SIEM Query:
EventID=4688 AND NewProcessName="*msaccess.exe" AND CommandLine LIKE "*.accdb" OR "*.mdb"