CVE-2020-0452
📋 TL;DR
This CVE describes an integer overflow vulnerability in Android's EXIF library that could allow remote code execution. Attackers can exploit this by sending specially crafted image files to vulnerable devices, potentially gaining full control without user interaction. All Android devices running versions 8.0 through 11 are affected.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
Android by Google
Fedora by Fedoraproject
Fedora by Fedoraproject
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full control of Android device, installs malware, steals sensitive data, and uses device as pivot point in network.
Likely Case
Remote code execution leading to data theft, surveillance, or ransomware deployment on vulnerable devices.
If Mitigated
Attack fails due to patched systems or network segmentation preventing image processing from untrusted sources.
🎯 Exploit Status
Exploitation requires crafting malicious EXIF data in image files. No authentication needed, but requires app to process the image.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin November 2020 patches
Vendor Advisory: https://source.android.com/security/bulletin/2020-11-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > Advanced > System update. 2. Install November 2020 security patch or later. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable automatic image processing
androidPrevent apps from automatically downloading or processing images from untrusted sources
Network filtering
allBlock image downloads from untrusted sources at network perimeter
🧯 If You Can't Patch
- Segment vulnerable devices from critical networks and internet access
- Implement application allowlisting to restrict which apps can process image files
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Android version. If version is 8.0-11 without November 2020 security patch, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android Security Patch Level is November 2020 or later in Settings > About phone > Android security patch level.📡 Detection & Monitoring
Log Indicators:
- Crash logs from media processing services
- Unexpected process spawn from image handling apps
- Memory corruption errors in system logs
Network Indicators:
- Unusual image downloads to Android devices
- Suspicious EXIF data in network traffic
SIEM Query:
source="android_logs" AND (process="media.*" OR process="camera.*") AND (message="segmentation fault" OR message="memory corruption" OR message="out of bounds")🔗 References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ELDZR6USD5PR34MRK2ZISLCYJ465FNKN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVBD5JRUQPN4LQHTAAJHA3MR5M7YTAC7/
- https://security.gentoo.org/glsa/202011-19
- https://source.android.com/security/bulletin/2020-11-01
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ELDZR6USD5PR34MRK2ZISLCYJ465FNKN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVBD5JRUQPN4LQHTAAJHA3MR5M7YTAC7/
- https://security.gentoo.org/glsa/202011-19
- https://source.android.com/security/bulletin/2020-11-01
