CVE-2024-49057
📋 TL;DR
This vulnerability allows attackers to spoof Microsoft Defender for Endpoint on Android, potentially tricking users into believing malicious apps are legitimate. It affects Android devices running Microsoft Defender for Endpoint with insufficient input validation.
💻 Affected Systems
- Microsoft Defender for Endpoint
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could bypass security warnings, install malware disguised as legitimate apps, and compromise sensitive enterprise data on mobile devices.
Likely Case
Users might be tricked into installing malicious apps that appear to be verified by Defender, leading to data theft or further device compromise.
If Mitigated
With proper mobile device management and user awareness, impact is limited to potential app spoofing attempts that users can recognize.
🎯 Exploit Status
Exploitation requires user interaction but uses standard Android app spoofing techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version of Microsoft Defender for Endpoint for Android
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49057
Restart Required: No
Instructions:
1. Open Google Play Store 2. Search for Microsoft Defender for Endpoint 3. Tap Update 4. Ensure automatic updates are enabled for future protection
🔧 Temporary Workarounds
Disable app installation from unknown sources
androidPrevents installation of apps outside official app stores
Android Settings > Security > Unknown Sources > Disable
Enable Google Play Protect
androidAdds additional app verification layer
Google Play Store > Menu > Play Protect > Settings > Scan apps with Play Protect
🧯 If You Can't Patch
- Implement mobile device management (MDM) policies to restrict app installations
- Educate users about app spoofing risks and verify app authenticity before installation
🔍 How to Verify
Check if Vulnerable:
Check Microsoft Defender for Endpoint version in app settings; versions before the patched release are vulnerable.Check Version:
Open Microsoft Defender for Endpoint app > Settings > AboutVerify Fix Applied:
Verify Microsoft Defender for Endpoint is updated to latest version in Google Play Store.📡 Detection & Monitoring
Log Indicators:
- Unusual app installation attempts
- Defender warning bypass events
- Multiple app verification failures
Network Indicators:
- Downloads from untrusted sources to mobile devices
- Phishing links targeting mobile users
SIEM Query:
source="android_logs" AND (event="app_install" AND source!="play_store") OR (app="defender" AND action="warning_bypass")