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OpenTFTP SP 1.4 Error Packet Overflow

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OpenTFTP SP 1.4 Error Packet Overflow

Disclosed
07/05/2008
Created
05/30/2018

Description

This module exploits a buffer overflow in OpenTFTP Server SP 1.4. The vulnerable condition triggers when the TFTP opcode is configured as an error packet, the TFTP service will then format the message using a sprintf() function, which causes an overflow, therefore allowing remote code execution under the context of SYSTEM. The offset (to EIP) is specific to how the TFTP was started (as a 'Stand Alone', or 'Service'). By default the target is set to 'Service' because that's the default configuration during OpenTFTP Server SP 1.4's installation.

Author(s)

  • tixxDZ
  • steponequit

Platform

Windows

Development

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use exploit/windows/tftp/opentftp_error_code
msf exploit(opentftp_error_code) > show targets
    ...targets...
msf exploit(opentftp_error_code) > set TARGET < target-id >
msf exploit(opentftp_error_code) > show options
    ...show and set options...
msf exploit(opentftp_error_code) > exploit

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