CVE-2018-9350
📋 TL;DR
CVE-2018-9350 is an out-of-bounds read vulnerability in Android's H.264 decoder that could cause denial of service when processing malicious video files. This affects Android devices running vulnerable versions, requiring user interaction to trigger by opening a specially crafted video. The vulnerability allows attackers to crash the media processing service without requiring additional privileges.
💻 Affected Systems
- Android OS
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Persistent denial of service requiring device reboot, potentially disrupting critical media processing functions and causing system instability.
Likely Case
Temporary application crash or media service failure when processing malicious video content, requiring user to restart the affected app.
If Mitigated
No impact if patched; unpatched systems experience controlled crashes without privilege escalation or data compromise.
🎯 Exploit Status
Exploitation requires user to open malicious video file. The vulnerability is in media processing code that handles common video formats, making weaponization straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level 2018-06-01 and later
Vendor Advisory: https://source.android.com/docs/security/bulletin/pixel/2018-06-01
Restart Required: Yes
Instructions:
1. Apply Android security update dated 2018-06-01 or later. 2. For Pixel devices: Settings > System > System update. 3. For other Android devices: Check manufacturer's update schedule. 4. Reboot device after update installation.
🔧 Temporary Workarounds
Disable automatic media processing
androidPrevent automatic processing of video files in messaging and email apps
Use trusted video sources only
androidConfigure apps to only accept video files from trusted sources
🧯 If You Can't Patch
- Restrict video file downloads to trusted sources only
- Disable automatic media preview in messaging and email applications
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level: Settings > About phone > Android security patch level. If date is before 2018-06-01, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level shows 2018-06-01 or later date. Test with known safe video files to ensure media processing functions normally.📡 Detection & Monitoring
Log Indicators:
- Media server crashes in logcat
- ANR (Application Not Responding) for media-related processes
- Frequent media.process restarts
Network Indicators:
- Unusual video file downloads from untrusted sources
- Spike in media-related network traffic preceding crashes
SIEM Query:
source="android_logs" AND (process="media.server" OR process="mediaserver") AND (message="SIGSEGV" OR message="segmentation fault" OR message="out of bounds")