CVE-2024-47035
📋 TL;DR
This CVE describes a logic error in the virtio_ring.h header file that allows an out-of-bounds write, potentially leading to local privilege escalation without requiring user interaction or additional execution privileges. It affects Android devices using vulnerable versions of the virtio subsystem. The vulnerability could allow a local attacker to gain elevated privileges on the device.
💻 Affected Systems
- Android devices using virtio subsystem
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise with root/system-level access, allowing complete control over the device, data exfiltration, persistence, and lateral movement.
Likely Case
Local privilege escalation from a lower-privileged user or app to higher system privileges, enabling unauthorized access to sensitive data and system functions.
If Mitigated
Limited impact if proper security controls like SELinux, app sandboxing, and kernel hardening are in place, potentially containing the escalation.
🎯 Exploit Status
Requires local access but no user interaction; exploitation depends on specific device configurations and memory layout.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: October 2024 Android Security Patch
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2024-10-01
Restart Required: Yes
Instructions:
1. Apply the October 2024 Android security patch via system updates. 2. For Pixel devices, ensure build number includes October 2024 security patch level. 3. For other Android devices, check manufacturer's security bulletin for specific patch availability.
🔧 Temporary Workarounds
Disable virtio features if unused
linuxIf virtio functionality is not required, disable related kernel modules or features to reduce attack surface.
echo 'blacklist virtio' >> /etc/modprobe.d/blacklist.conf
update-initramfs -u
🧯 If You Can't Patch
- Implement strict access controls and limit local user privileges to reduce attack surface.
- Enable SELinux in enforcing mode and apply strict app sandboxing to contain potential privilege escalation.
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version. If patch level is before October 2024, device is likely vulnerable.Check Version:
getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows October 2024 or later in device settings.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected virtio-related errors in dmesg
- Privilege escalation attempts in audit logs
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="android_kernel" AND (event="kernel_panic" OR event="oops") AND message="*virtio*"