CVE-2018-16272
📋 TL;DR
This vulnerability allows any unprivileged process on Samsung Galaxy Gear smartwatches to fully control the Wi-Fi interface due to missing D-Bus security policy configurations in the wpa_supplicant service. This affects Tizen-based firmware on Samsung Galaxy Gear series before build RE2, enabling attackers to intercept network traffic, perform man-in-the-middle attacks, and potentially access sensitive data.
💻 Affected Systems
- Samsung Galaxy Gear series smartwatches
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of device network communications, enabling interception of all Wi-Fi traffic, credential theft, installation of malware, and potential lateral movement to connected networks.
Likely Case
Unauthorized monitoring of network traffic, interception of sensitive data transmitted over Wi-Fi, and potential credential harvesting from the compromised device.
If Mitigated
Limited impact with proper network segmentation and monitoring, though the vulnerability still exposes the device to local privilege escalation and network attacks.
🎯 Exploit Status
Exploitation requires local access to the device but no authentication to the vulnerable service. Public proof-of-concept was presented at DEF CON 26.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Build RE2 and later
Vendor Advisory: Not publicly documented in vendor advisory
Restart Required: Yes
Instructions:
1. Check current firmware version on Galaxy Gear device. 2. Update to Tizen firmware build RE2 or later via Samsung's official update mechanism. 3. Reboot device after update completes.
🔧 Temporary Workarounds
Disable Wi-Fi Interface
tizenTemporarily disable Wi-Fi functionality to prevent exploitation of the vulnerable wpa_supplicant service.
Settings > Connections > Wi-Fi > Turn Off
Restrict D-Bus Access
linuxConfigure D-Bus security policies to restrict access to wpa_supplicant service (requires root access).
Edit /etc/dbus-1/system.d/wpa_supplicant.conf to add proper security policies
🧯 If You Can't Patch
- Disconnect device from untrusted Wi-Fi networks and use Bluetooth-only connectivity where possible.
- Isolate device on separate network segment with strict firewall rules to limit potential lateral movement.
🔍 How to Verify
Check if Vulnerable:
Check firmware version on Galaxy Gear: Settings > About Gear > Software Information > Software version. If version is before RE2, device is vulnerable.Check Version:
Settings > About Gear > Software Information > Software versionVerify Fix Applied:
Verify firmware version is RE2 or later after update. Test D-Bus access to wpa_supplicant service from unprivileged context should be denied.📡 Detection & Monitoring
Log Indicators:
- Unusual D-Bus access attempts to wpa_supplicant service from unprivileged processes
- Unexpected wpa_supplicant configuration changes
- Abnormal Wi-Fi interface state changes
Network Indicators:
- Unexpected network traffic patterns from Galaxy Gear devices
- Wi-Fi interface operating in monitor/promiscuous mode unexpectedly
- Unusual ARP or DNS requests from watch devices
SIEM Query:
source="galaxy-gear-logs" AND (process="wpa_supplicant" AND dbus_access="unauthorized") OR (interface="wlan0" AND mode="monitor")🔗 References
- https://media.defcon.org/DEF%20CON%2026/DEF%20CON%2026%20presentations/Dongsung%20Kim%20and%20Hyoung%20Kee%20Choi%20-%20Updated/DEFCON-26-Dongsung-Kim-and-Hyoung-Kee-Choi-Your-Watch-Can-Watch-You-Updated.pdf
- https://www.youtube.com/watch?v=3IdgBwbOT-g&feature=youtu.be
- https://media.defcon.org/DEF%20CON%2026/DEF%20CON%2026%20presentations/Dongsung%20Kim%20and%20Hyoung%20Kee%20Choi%20-%20Updated/DEFCON-26-Dongsung-Kim-and-Hyoung-Kee-Choi-Your-Watch-Can-Watch-You-Updated.pdf
- https://www.youtube.com/watch?v=3IdgBwbOT-g&feature=youtu.be
