CVE-2023-35648
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Android's baseband firmware that could allow remote information disclosure. Attackers with baseband firmware compromise could potentially read sensitive memory contents without user interaction. This primarily affects Google Pixel devices running vulnerable Android versions.
💻 Affected Systems
- Google Pixel devices
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker with baseband firmware compromise could read sensitive memory contents, potentially exposing cryptographic keys, authentication tokens, or other protected data from the device's memory.
Likely Case
Targeted attacks against specific devices where attackers have already achieved baseband firmware compromise, potentially leading to information disclosure about device state or memory contents.
If Mitigated
With proper patching, the vulnerability is eliminated. Without patching but with network segmentation and monitoring, risk is reduced but not eliminated.
🎯 Exploit Status
Exploitation requires baseband firmware compromise first, which significantly raises the technical barrier. No authentication is required once baseband is compromised.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: October 2023 Android security patch or later
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2023-10-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Download and install October 2023 security patch or later. 3. Reboot device after installation completes.
🔧 Temporary Workarounds
Network segmentation
allIsolate vulnerable devices from untrusted networks to reduce attack surface
Disable unnecessary baseband features
androidTurn off features like Wi-Fi calling, VoLTE if not needed to reduce attack surface
🧯 If You Can't Patch
- Isolate affected devices on separate network segments with strict firewall rules
- Implement network monitoring for unusual baseband communication patterns
🔍 How to Verify
Check if Vulnerable:
Check Android version and security patch level in Settings > About phone > Android version. If security patch level is before October 2023, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows October 2023 or later in Settings > About phone > Android version.📡 Detection & Monitoring
Log Indicators:
- Unusual baseband firmware activity logs
- Memory access violation logs in system logs
Network Indicators:
- Unusual baseband communication patterns
- Suspicious cellular network interactions
SIEM Query:
source="android_system_logs" AND ("baseband" OR "modem") AND ("error" OR "violation" OR "out of bounds")