#!/usr/bin/perl -w
#
# a perl tool to make a exploit hunters life easier. looks through source code
# for possible exploits. the line found may not be an actual exploit, but it
# sure does spot possible ones faster than you could by hand. you can add
# functions that should be searched for yourself by editing the ifs in this 
# file. also this tool has the ability to tail certain variables that you may
# find interesting. since sometimes you will find a possible exploit, but not
# able to figure out if the variable in the function is allready declared or
# not, you use this option to follow that variable and figure out if it is or
# not.
#
# $Id: audit.pl,v 0.1 2007/O2/17 08:21:00 varc Exp $
 
use strict;
use File::Find;
use Getopt::Long;
 
my ( $dir, $tail, $i );
my $options = { d => \$dir, t => \$tail };
GetOptions( $options, "d=s", "t:s" );

my @functions = ( "include", "include_once", "require", "require_once" );

&usage unless $dir;

if ( !defined( $tail ) )
{
	find( { wanted => \&scan, no_chdir => 1 }, $dir );
}
else
{
	find( { wanted => \&tail, no_chdir => 1 }, $dir );
}

exit;
 
sub scan
{
        my $fi = $File::Find::name;
 
        if ( ( $fi =~ /\.php$/i ) ||
             ( $fi =~ /\.inc$/i ) ||
             ( $fi =~ /\.inc.php$/i) ||
             ( $fi =~ /\.php4$/i) )
        {
		my $i = 1;
                open( FILY, "$fi" ) or warn "Failed to open $fi - $!";
                foreach my $line ( <FILY> )
                {
foreach my $f ( @functions )
{
                        if ( $line =~ /\s*$f\s*\(([^)]+)\)\s*;/ )
                        {
                                my $exp = $1;
                                if ( $exp =~ /\$/ )
                                {
                                        print $fi . " [" . $exp . "] ". $line;
                                }
                        }
                }
 }
}
}

sub tail
{
        my $fi = $File::Find::name;

        if ( ( $fi =~ /\.php$/i ) ||
             ( $fi =~ /\.inc$/i ) ||
             ( $fi =~ /\.inc.php$/i) ||
             ( $fi =~ /\.php4$/i) )
        {
                open( FILY, "$fi" ) or warn "Failed to open $fi - $!";
                foreach my $line ( <FILY> )
		{
			if ( $line =~ /(\$$tail)/ )
			{
				print $fi . " [" . $1 . "] " . $line;
			}
		}
	}
}

sub usage
{
        print "source code auditor\n";
        print "usage: perl $0 -dt\n\n";
        print "  -d\t\tdirectory with the source code to scan\n";
        print "  -t\t\tvariable to tail (optional)\n";
        exit;
}