CVE-2020-12751
📋 TL;DR
This vulnerability in Samsung's Quram image codec library allows attackers to execute arbitrary code by sending specially crafted JPEG images. When processed by affected Samsung devices, these images can overwrite memory and potentially give attackers full control of the device. The vulnerability affects Samsung mobile devices running Android 8.x (Oreo), 9.0 (Pie), and 10.0 (Q).
💻 Affected Systems
- Samsung mobile devices
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing remote code execution, data theft, and persistent backdoor installation.
Likely Case
Malicious apps or websites could exploit this to gain elevated privileges and access sensitive data.
If Mitigated
With proper security controls, exploitation would be limited to sandboxed environments with minimal impact.
🎯 Exploit Status
Exploitation requires delivering a malicious JPEG image to the device, which could occur through malicious apps, websites, or messages.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: May 2020 security update and later
Vendor Advisory: https://security.samsungmobile.com/securityUpdate.smsb
Restart Required: Yes
Instructions:
1. Go to Settings > Software update on Samsung device. 2. Tap Download and install. 3. Install any available updates, particularly May 2020 or later security patches. 4. Restart device after installation.
🔧 Temporary Workarounds
Disable automatic image processing
allPrevent automatic loading of JPEG images in browsers and messaging apps
Use alternative image viewers
allConfigure devices to use third-party image viewers instead of default Samsung gallery
🧯 If You Can't Patch
- Restrict installation of untrusted applications from unknown sources
- Implement network filtering to block malicious image delivery through web and email
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Software information. If running Android 8.x, 9.0, or 10.0 without May 2020 security patch, device is vulnerable.Check Version:
Settings > About phone > Software information > Android version and Security patch levelVerify Fix Applied:
Verify security patch level in Settings > About phone > Software information shows May 2020 or later.📡 Detection & Monitoring
Log Indicators:
- Crash logs from Quram library
- Unexpected process termination in image processing services
Network Indicators:
- Unusual image downloads to mobile devices
- Suspicious JPEG files delivered to endpoints
SIEM Query:
source="android_logs" AND (process="quram" OR message="*Quram*" OR message="*JPEG* crash*")