Читаем 19 смертных грехов, угрожающих безопасности программ полностью

Вот та же классическая ошибка, но в программе на языке РНР, часто применяемом для доступа к базам данных.

...

$db = mysql_connect("localhost","root","$$sshhh...!");

mysql_select_db("Shipping",$db);

$id = $HTTP_GET_VARS["id"];

$qry = "SELECT ccnum FROM cust WHERE id = %$id%";

$result = mysql_query($qry,$db);

if ($result) {

echo mysql_result($result,0,"ccnum");

} else {

echo "No result! " . mysql_error();

}

?>

Греховность Perl/CGI

И снова тот же дефект, но на этот раз в программе на достопочтенном Perl:

...

#!/usr/bin/perl

use DBI;

use CGI;

print CGI::header();

$cgi = new CGI;

$id = $cgi->param(\'id\');

$dbh = DBI->connect(\'DBI:mysql:Shipping:localhost\',

\'root\',

\'$3cre+\')

or print "Ошибка connect : $DBI::errstr";

$sql = "SELECT ccnum FROM cust WHERE id = " . $id;

$sth = $dbh->prepare($sql)

or print "Ошибка prepare : $DBI::errstr";

$sth->execute()

or print "Ошибка execute : $DBI::errstr";

# Вывести данные

while (@row = $sth->fetchrow_array ) {

print "@row
";

}

$dbh->disconnect; print "

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