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Wing FTP Server 4.x Denial Of Service

Wing FTP Server 4.x Denial Of Service
Posted Oct 10, 2012
Authored by Anil Pazvant

Wing FTP server versions prior to 4.1.1 suffer from a denial of service vulnerability.

tags | advisory, denial of service
advisories | CVE-2012-4729
MD5 | 39441b6924405efe96b99a88ad7e14df

Wing FTP Server 4.x Denial Of Service

Change Mirror Download
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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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