WzdFTPD 'hash.c'的chtbl_lookup函数拒绝服务攻击漏洞

QQ空间 新浪微博 微信 QQ facebook twitter
漏洞ID 1192015 漏洞类型 未知
发布时间 2007-01-22 更新时间 2007-01-22
CVE编号 CVE-2007-0428 CNNVD-ID CNNVD-200701-370
漏洞平台 N/A CVSS评分 5.0
|漏洞来源
https://www.securityfocus.com/bid/86766
https://cxsecurity.com/issue/WLB-2007010086
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200701-370
|漏洞详情
WzdFTPD8.0及之前版本的hash.c中的chtbl_lookup函数存在未明漏洞。远程攻击者可以借助一个特制的FTP指令,引起拒绝服务攻击。该漏洞可能由空指针引用引起。
|漏洞EXP
##############################################################

- 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 (at) s21sec (dot) com [email concealed])
       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 (at) s21sec (dot) com [email concealed]> S21Sec

With thanks to:

- David Barroso <dbarroso (at) s21sec (dot) com [email concealed]> S21Sec

[ REFERENCES ]

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

* S21Sec
   http://www.s21sec.com
|受影响的产品
wzdftpd wzdftpd 8.0
|参考资料

来源:XF
名称:wzdftpd-ftp-dos(31599)
链接:http://xforce.iss.net/xforce/xfdb/31599
来源:BUGTRAQ
名称:20070119WzdFTPD<8.1Denialofservice
链接:http://www.securityfocus.com/archive/1/archive/1/457454/100/0/threaded
来源:MISC
链接:http://www.s21sec.com/avisos/s21sec-033-en.txt
来源:SECTRACK
名称:1017537
链接:http://securitytracker.com/id?1017537
来源:OSVDB
名称:32941
链接:http://osvdb.org/32941
来源:FULLDISC
名称:20070119WzdFTPD<8.1Denialofservice
链接:http://lists.grok.org.uk/pipermail/full-disclosure/2007-January/051896.html
来源:VUPEN
名称:ADV-2007-0277
链接:http://www.frsirt.com/english/advisories/2007/0277
来源:SREASON
名称:2171
链接:http://securityreason.com/securityalert/2171
来源:SECUNIA
名称:23852
链接:http://secunia.com/advisories/23852