CVE-2015-9219
📋 TL;DR
An integer overflow vulnerability in the DRM API of Qualcomm Snapdragon chipsets allows buffer overflow attacks. This affects Android devices using SD 400 and SD 800 chipsets before the April 2018 security patch. Attackers could potentially execute arbitrary code with elevated privileges.
💻 Affected Systems
- Android devices with Qualcomm Snapdragon SD 400
- Android devices with Qualcomm Snapdragon SD 800
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges leading to complete device compromise, data theft, and persistent backdoor installation.
Likely Case
Local privilege escalation allowing apps to gain elevated permissions and access sensitive data or system functions.
If Mitigated
Limited impact with proper patch management and app sandboxing in place.
🎯 Exploit Status
Requires local access or malicious app installation. No public exploit code available, but integer overflow to buffer overflow is a well-understood exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level April 5, 2018 or later
Vendor Advisory: https://source.android.com/security/bulletin/2018-04-01
Restart Required: Yes
Instructions:
1. Check current security patch level in Settings > About phone > Android security patch level. 2. If before April 2018, install the latest available system update. 3. For enterprise devices, push updates through MDM solutions. 4. Reboot device after update installation.
🔧 Temporary Workarounds
Disable unnecessary DRM-related apps
androidRemove or disable apps that use DRM APIs if not required for business functions
adb shell pm disable-user --user 0 <package_name>
🧯 If You Can't Patch
- Isolate affected devices from critical networks and data
- Implement strict app installation policies and application allowlisting
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone. If date is before April 2018, device is vulnerable if it uses SD 400 or SD 800 chipset.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows April 2018 or later. Check Qualcomm chipset model in device specifications.📡 Detection & Monitoring
Log Indicators:
- Unusual DRM API calls
- Process crashes in media-related services
- Privilege escalation attempts
Network Indicators:
- Unusual outbound connections from media apps
- Suspicious app update patterns
SIEM Query:
source="android_logs" AND ("DRM" OR "media.codec") AND ("overflow" OR "segfault" OR "SIGSEGV")