module

Grandstream GXV31XX 'settimezone' Unauthenticated Command Execution

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Disclosed
Sep 1, 2016
Created
Feb 9, 2022

Description

This module exploits a command injection vulnerability in Grandstream GXV31XX
IP multimedia phones. The 'settimezone' action does not validate input in the
'timezone' parameter allowing injection of arbitrary commands.

A buffer overflow in the 'phonecookie' cookie parsing allows authentication
to be bypassed by providing an alphanumeric cookie 93 characters in length.

This module was tested successfully on Grandstream models:
GXV3175v2 hardware revision V2.6A with firmware version 1.0.1.19; and
GXV3140 hardware revision V0.4B with firmware version 1.0.1.27.

Authors

alhazred
Brendan Scarvell
bcoles [email protected]

Platform

Linux,Unix

Architectures

cmd, armle

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':


    msf > use exploit/linux/http/grandstream_gxv31xx_settimezone_unauth_cmd_exec
    msf exploit(grandstream_gxv31xx_settimezone_unauth_cmd_exec) > show targets
        ...targets...
    msf exploit(grandstream_gxv31xx_settimezone_unauth_cmd_exec) > set TARGET < target-id >
    msf exploit(grandstream_gxv31xx_settimezone_unauth_cmd_exec) > show options
        ...show and set options...
    msf exploit(grandstream_gxv31xx_settimezone_unauth_cmd_exec) > exploit
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