CVE-2024-40673
📋 TL;DR
This vulnerability in Android's ZipFile.java allows attackers to execute arbitrary code by manipulating dynamic code loading through improper input validation. It enables remote code execution without requiring user interaction or additional privileges. Android devices using vulnerable versions of the platform libcore library are affected.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the device, data theft, and persistent backdoor installation.
Likely Case
Remote code execution leading to data exfiltration, device enrollment in botnets, or installation of additional malware payloads.
If Mitigated
Attack blocked at network perimeter or application sandbox prevents code execution, limiting impact to denial of service.
🎯 Exploit Status
Exploitation requires delivering a malicious zip file to the target device, which could occur through various attack vectors including malicious apps, downloads, or network traffic.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: October 2024 Android Security Patch
Vendor Advisory: https://source.android.com/security/bulletin/2024-10-01
Restart Required: Yes
Instructions:
1. Apply October 2024 Android Security Patch. 2. Update affected Android devices through system updates. 3. Verify patch installation in device settings.
🔧 Temporary Workarounds
Disable zip file processing
androidPrevent applications from processing zip files from untrusted sources
Network filtering
allBlock zip file downloads at network perimeter
🧯 If You Can't Patch
- Isolate vulnerable devices from untrusted networks
- Implement application whitelisting to prevent execution of unauthorized code
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version. If before October 2024, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows October 2024 or later in device settings.📡 Detection & Monitoring
Log Indicators:
- Unusual zip file processing in application logs
- Suspicious file operations following zip extraction
Network Indicators:
- Unexpected zip file downloads to Android devices
- Outbound connections following zip file processing
SIEM Query:
source="android_logs" AND ("zip" OR "ZipFile") AND ("loadClass" OR "DexClassLoader")