CVE-2017-13323
📋 TL;DR
CVE-2017-13323 is an integer overflow vulnerability in Android's String16.cpp that allows unprivileged processes to write out of bounds memory. This can lead to local privilege escalation without user interaction. Affects Android devices running vulnerable versions.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains root/system privileges on the device, potentially compromising all user data and system integrity.
Likely Case
Malicious app escapes sandbox to access other apps' data or system resources.
If Mitigated
With proper app sandboxing and SELinux policies, impact limited to app's own data.
🎯 Exploit Status
Requires local code execution but no user interaction. Proof-of-concept code exists in security research community.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level 2018-05-01 or later
Vendor Advisory: https://source.android.com/docs/security/bulletin/pixel/2018-05-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > Advanced > System update. 2. Install available security update. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable unknown sources
androidPrevent installation of untrusted apps that could exploit this vulnerability
Settings > Security > Unknown sources (toggle OFF)
🧯 If You Can't Patch
- Restrict app installations to Google Play Store only
- Use mobile device management (MDM) to enforce security policies and monitor for suspicious app behavior
🔍 How to Verify
Check if Vulnerable:
Check Settings > About phone > Android security patch level. If date is before 2018-05-01, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level shows 2018-05-01 or later date.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in system logs
- SELinux denials for unexpected process transitions
Network Indicators:
- Not applicable - local exploit
SIEM Query:
Not applicable for typical Android deployments