CVE-2020-0460
📋 TL;DR
This vulnerability in Android's certificate installer allows improperly installed certificates due to a logic error, potentially enabling remote information disclosure without requiring user interaction or additional privileges. It affects Android 11 devices, allowing attackers to intercept or manipulate encrypted communications.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Attackers could install malicious certificates to intercept and decrypt HTTPS traffic, leading to data theft, man-in-the-middle attacks, or credential compromise.
Likely Case
Exploitation could result in unauthorized access to sensitive data transmitted over networks, such as login credentials or personal information.
If Mitigated
With proper controls like network segmentation and certificate pinning, the risk is reduced to minimal, limiting exposure to internal threats.
🎯 Exploit Status
Exploitation requires network access but no authentication or user interaction, making it relatively straightforward for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin December 2020 or later
Vendor Advisory: https://source.android.com/security/bulletin/2020-12-01
Restart Required: Yes
Instructions:
1. Check for system updates in Android Settings. 2. Install the December 2020 security patch or later. 3. Restart the device to apply the update.
🔧 Temporary Workarounds
Disable certificate installation
androidPrevent installation of new certificates to block exploitation, but this may break legitimate certificate management.
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable devices from untrusted networks.
- Use certificate pinning in apps to prevent acceptance of unauthorized certificates.
🔍 How to Verify
Check if Vulnerable:
Check the Android version in Settings > About phone; if it is Android 11 and not updated with the December 2020 patch, it is vulnerable.Check Version:
On Android, use 'adb shell getprop ro.build.version.release' to check the OS version.Verify Fix Applied:
Verify the security patch level in Settings > About phone > Android version; ensure it includes December 2020 or later.📡 Detection & Monitoring
Log Indicators:
- Look for unusual certificate installation events in system logs or security logs.
Network Indicators:
- Monitor for unexpected SSL/TLS certificate changes or man-in-the-middle attack patterns in network traffic.
SIEM Query:
Example: 'event_category:certificate_install AND os_version:Android-11' to detect potential exploitation attempts.