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Database: Hardening for wpdb::prepare()

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Previously if you passed an array of values for placeholders, additional values could be passed as well. Now additional values will be ignored.

Merges [41470] to 4.4 branch.



git-svn-id: https://develop.svn.wordpress.org/branches/4.4@41475 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Aaron D. Campbell 2017-09-19 15:00:28 +00:00
parent 16be4fffbf
commit a577ca8fcd
2 changed files with 50 additions and 1 deletions
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11
src/wp-includes/wp-db.php
View File

@ -1254,9 +1254,18 @@ class wpdb {
$args = func_get_args();
array_shift( $args );
// If args were passed as an array (as in vsprintf), move them up
if ( isset( $args[0] ) && is_array($args[0]) )
if ( is_array( $args[0] ) && count( $args ) == 1 ) {
$args = $args[0];
}
foreach ( $args as $arg ) {
if ( ! is_scalar( $arg ) ) {
_doing_it_wrong( 'wpdb::prepare', sprintf( 'Unsupported value type (%s).', gettype( $arg ) ), '4.4.11' );
}
}
$query = str_replace( "'%s'", '%s', $query ); // in case someone mistakenly already singlequoted it
$query = str_replace( '"%s"', '%s', $query ); // doublequote unquoting
$query = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware

40
tests/phpunit/tests/db.php
View File

@ -353,6 +353,46 @@ class Tests_DB extends WP_UnitTestCase {
$this->assertEquals( "SELECT * FROM $wpdb->users WHERE id = 0", $prepared );
}
function test_prepare_sprintf() {
global $wpdb;
$prepared = $wpdb->prepare( "SELECT * FROM $wpdb->users WHERE id = %d AND user_login = %s", 1, "admin" );
$this->assertEquals( "SELECT * FROM $wpdb->users WHERE id = 1 AND user_login = 'admin'", $prepared );
}
/**
* @expectedIncorrectUsage wpdb::prepare
*/
function test_prepare_sprintf_invalid_args() {
global $wpdb;
$prepared = @$wpdb->prepare( "SELECT * FROM $wpdb->users WHERE id = %d AND user_login = %s", 1, array( "admin" ) );
$this->assertEquals( "SELECT * FROM $wpdb->users WHERE id = 1 AND user_login = ''", $prepared );
$prepared = @$wpdb->prepare( "SELECT * FROM $wpdb->users WHERE id = %d AND user_login = %s", array( 1 ), "admin" );
$this->assertEquals( "SELECT * FROM $wpdb->users WHERE id = 0 AND user_login = 'admin'", $prepared );
}
function test_prepare_vsprintf() {
global $wpdb;
$prepared = $wpdb->prepare( "SELECT * FROM $wpdb->users WHERE id = %d AND user_login = %s", array( 1, "admin" ) );
$this->assertEquals( "SELECT * FROM $wpdb->users WHERE id = 1 AND user_login = 'admin'", $prepared );
}
/**
* @expectedIncorrectUsage wpdb::prepare
*/
function test_prepare_vsprintf_invalid_args() {
global $wpdb;
$prepared = @$wpdb->prepare( "SELECT * FROM $wpdb->users WHERE id = %d AND user_login = %s", array( 1, array( "admin" ) ) );
$this->assertEquals( "SELECT * FROM $wpdb->users WHERE id = 1 AND user_login = ''", $prepared );
$prepared = @$wpdb->prepare( "SELECT * FROM $wpdb->users WHERE id = %d AND user_login = %s", array( array( 1 ), "admin" ) );
$this->assertEquals( "SELECT * FROM $wpdb->users WHERE id = 0 AND user_login = 'admin'", $prepared );
}
function test_db_version() {
global $wpdb;