module

UltraVNC 1.0.2 Client (vncviewer.exe) Buffer Overflow

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Disclosed
Feb 6, 2008
Created
May 30, 2018

Description

This module exploits a buffer overflow in UltraVNC Viewer 1.0.2 Release.

If a malicious server responds to a client connection indicating a minor
protocol version of 14 or 16, a 32-bit integer is subsequently read from
the TCP stream by the client and directly provided as the trusted size for
further reading from the TCP stream into a 1024-byte character array on
the stack.

Author

noperand

Platform

Windows

References

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/vnc/ultravnc_viewer_bof
    msf exploit(ultravnc_viewer_bof) > show targets
        ...targets...
    msf exploit(ultravnc_viewer_bof) > set TARGET < target-id >
    msf exploit(ultravnc_viewer_bof) > show options
        ...show and set options...
    msf exploit(ultravnc_viewer_bof) > exploit
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