CVE-2024-49065
📋 TL;DR
This vulnerability in Microsoft Office allows attackers to execute arbitrary code on a victim's system by tricking them into opening a specially crafted document. It affects users of Microsoft Office applications who open malicious files. The vulnerability requires user interaction to be exploited.
💻 Affected Systems
- Microsoft Office
📦 What is this software?
365 Apps by Microsoft
Office by Microsoft
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Word by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the victim's computer, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or limited code execution within the Office application context, potentially leading to credential theft or malware installation.
If Mitigated
No impact if users don't open untrusted documents and proper security controls are in place.
🎯 Exploit Status
Requires social engineering to get user to open malicious document. No known public exploits at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft's monthly security updates for Office
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49065
Restart Required: Yes
Instructions:
1. Open any Office application. 2. Go to File > Account > Update Options > Update Now. 3. Restart Office applications after update completes. 4. For enterprise deployments, deploy through Microsoft Update or WSUS.
🔧 Temporary Workarounds
Block Office file types via email filtering
allPrevent delivery of potentially malicious Office documents via email
Enable Protected View
windowsConfigure Office to open documents from untrusted sources in Protected View
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized Office document execution
- Deploy endpoint detection and response (EDR) solutions to monitor for suspicious Office behavior
🔍 How to Verify
Check if Vulnerable:
Check Office version against Microsoft's security update documentationCheck Version:
In Word/Excel: File > Account > About [Application Name]Verify Fix Applied:
Verify Office version matches or exceeds patched version in Microsoft advisory📡 Detection & Monitoring
Log Indicators:
- Unusual Office process spawning child processes
- Office applications accessing unexpected network resources
- Multiple failed document parsing attempts
Network Indicators:
- Office applications making unexpected outbound connections
- Beaconing behavior from Office processes
SIEM Query:
Process creation where parent process contains 'winword.exe' or 'excel.exe' and child process is unusual