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WingFTP Server Denial of Service Vulnerability
From: Anil Pazvant <pazwant () gmail com>
Date: Tue, 9 Oct 2012 16:58:06 +0200

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|  WingFTP Server Denial of Service Vulnerability  |

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Summary

=======

WingFTP server  is prone to a remote denial-of-service vulnerability.

Attackers can exploit this issue to cause the service to crash,
denying service to legitimate users



CVE number: CVE-2012-4729

Impact: High

Vendor homepage: http://www.wftpserver.com/serverhistory.htm#gotop

Vendor notified: 30/08/2012

Vendor response: Vendor fixed the vulnerability and released the fix.

.

Affected Products

======== ========
Windows Platforms.


Details
=======

It is possible the crash the process by sending two sequential request
to zip file option by authenticated users.

The output of debugger:



(6e4.c4c): C++ EH exception - code e06d7363 (first chance) ( After
first request )


eax=026a6b80 ebx=00000001 ecx=00000004 edx=00000000 esi=00000001 edi=00000000
eip=7c90e514 esp=014ce1cc ebp=014ce1dc iopl=0         nv up ei ng nz na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00000286
ntdll!KiFastSystemCallRet:
7c90e514 c3              ret

Impact

======

Process crashed and the all services down.


Solution
========

Issue was fixed on Version 4.1.1

http://www.wftpserver.com/serverhistory.htm#gotop


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