full-disclosure - WzdFTPD < 8.1 Denial of service

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <E1633443-C122-40DA-BC90-6C8D57864F64@s21sec.com>
Date: Fri, 19 Jan 2007 12:54:07 +0100
From: S21sec Labs <labs@...sec.com>
To: full-disclosure@...ts.grok.org.uk,
 bugtraq@...urityfocus.com
Subject: 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@...sec.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@...sec.com> S21Sec

With thanks to:

	- David Barroso <dbarroso@...sec.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/