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Category:   Application (File Transfer/Sharing)  >   wzdftpd Vendors:   Chifflier, Pierre
wzdftpd Unspecified Bug Lets Remote Users Cause Denial of Service Conditions
SecurityTracker Alert ID:  1017537
SecurityTracker URL:  http://securitytracker.com/id/1017537
CVE Reference:   CVE-2007-0428   (Links to External Site)
Updated:  May 19 2008
Original Entry Date:  Jan 19 2007
Impact:   Denial of service via network

Version(s): 8.0 and prior
Description:   A vulnerability was reported in wzdftpd. A remote user can cause denial of service conditions.

A remote user can send a specially crafted FTP command to cause denial of service conditions for target service.

The vendor was notified on January 8, 2007.

Jose Miguel Esparza of S21Sec discovered this vulnerability.

The original advisory is available at:

http://www.s21sec.com/avisos/s21sec-033-en.txt

[Editor's note: The report did not indicate if authentication is required to exploit this vulnerability or not.]

Impact:   A remote user can cause denial of service conditions.
Solution:   Version 8.1 is not affected.

No solution was available at the time of this entry for versions prior to 8.1.

The report indicates that, as a workaround, you can add a "key != NULL" condition in the chtbl_lookup function of the 'hash.c' file.

Vendor URL:  www.wzdftpd.net/ (Links to External Site)
Cause:   Not specified
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Date:  Fri, 19 Jan 2007 12:54:07 +0100
Subject:  [Full-disclosure] WzdFTPD < 8.1 Denial of service

##############################################################

                      - S21Sec Advisory -

##############################################################

     Title:   WzdFTPD Denial of Service
        ID:   S21SEC-033-en
  Severity:   Medium - Denial of Service
   History:   26.Dic.2006 Vulnerability discovered
                      8.Ene.2007 Vendor contacted

     Scope:   FTP Server Denial of Service
Platforms:   Any
    Author:   Jose Miguel Esparza (jesparza@s21sec.com)
       URL:   http://www.s21sec.com/avisos/s21sec-033-en.txt
   Release:   Public

[ SUMMARY ]

WzdFTPD is a ftp server designed to be modular and portable, work  
under linux/win32/freebsd/openbsd, and to be entirely configurable  
online using SITE commands. It supports SSL, IPv6, multithreading,  
external scripts, and it uses Unix-like permissions and ACLs, with  
virtual users and groups.

WzdFTPD project also supports bandwith limitation (per user, per  
group, or globally), group administrators, and per command  
authorization.


[ AFFECTED VERSIONS ]

Following versions are affected with this issue:

	- WzdFTPD v8.0 and prior.
         - Lastest version (8.1) is not affected by this vulnerability.


[ DESCRIPTION ]

It's possible to cause a denial of service sending a special crafted  
FTP command.


[ WORKAROUND ]

Add "key != NULL" condition in the chtbl_lookup function of the  
hash.c file until vendor solution or upgrade to 8.1.


[ ACKNOWLEDGMENTS ]

These vulnerabilities have been found and researched by:

	- Jose Miguel Esparza <jesparza@s21sec.com> S21Sec

With thanks to:

	- David Barroso <dbarroso@s21sec.com> S21Sec	


[ REFERENCES ]

* WzdFTPD
   http://www.wzdftpd.net/

* S21Sec
   http://www.s21sec.com

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

 
 


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