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Better validation of the URL used in HTTP redirects.

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Merges [36444] to the 4.4 branch.

git-svn-id: https://develop.svn.wordpress.org/branches/4.4@36447 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Dominik Schilling (ocean90) 2016-02-02 16:58:49 +00:00
parent e6978c0bdf
commit 9d1455b89b
2 changed files with 117 additions and 3 deletions
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15
src/wp-includes/pluggable.php
View File

@ -1333,7 +1333,8 @@ function wp_validate_redirect($location, $default = '') {
// In php 5 parse_url may fail if the URL query part contains http://, bug #38143
$test = ( $cut = strpos($location, '?') ) ? substr( $location, 0, $cut ) : $location;
$lp = parse_url($test);
// @-operator is used to prevent possible warnings in PHP < 5.3.3.
$lp = @parse_url($test);
// Give up if malformed URL
if ( false === $lp )
@ -1343,9 +1344,17 @@ function wp_validate_redirect($location, $default = '') {
if ( isset($lp['scheme']) && !('http' == $lp['scheme'] || 'https' == $lp['scheme']) )
return $default;
// Reject if scheme is set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
if ( isset($lp['scheme']) && !isset($lp['host']) )
// Reject if certain components are set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
return $default;
}
// Reject malformed components parse_url() can return on odd inputs
foreach ( array( 'user', 'pass', 'host' ) as $component ) {
if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
return $default;
}
}
$wpp = parse_url(home_url());

105
tests/phpunit/tests/formatting/redirect.php
View File

@ -3,8 +3,21 @@
/**
* @group pluggable
* @group formatting
* @group redirect
*/
class Tests_Formatting_Redirect extends WP_UnitTestCase {
function setUp() {
add_filter( 'home_url', array( $this, 'home_url' ) );
}
function tearDown() {
remove_filter( 'home_url', array( $this, 'home_url' ) );
}
function home_url() {
return 'http://example.com/';
}
function test_wp_sanitize_redirect() {
$this->assertEquals('http://example.com/watchthelinefeedgo', wp_sanitize_redirect('http://example.com/watchthelinefeed%0Ago'));
$this->assertEquals('http://example.com/watchthelinefeedgo', wp_sanitize_redirect('http://example.com/watchthelinefeed%0ago'));
@ -20,4 +33,96 @@ class Tests_Formatting_Redirect extends WP_UnitTestCase {
$this->assertEquals('http://example.com/search.php?search=(amistillhere)', wp_sanitize_redirect('http://example.com/search.php?search=(amistillhere)'));
$this->assertEquals('http://example.com/@username', wp_sanitize_redirect('http://example.com/@username'));
}
/**
* @dataProvider valid_url_provider
*/
function test_wp_validate_redirect_valid_url( $url, $expected ) {
$this->assertEquals( $expected, wp_validate_redirect( $url ) );
}
/**
* @dataProvider invalid_url_provider
*/
function test_wp_validate_redirect_invalid_url( $url ) {
$this->assertEquals( false, wp_validate_redirect( $url, false ) );
}
function valid_url_provider() {
return array(
array( 'http://example.com', 'http://example.com' ),
array( 'http://example.com/', 'http://example.com/' ),
array( 'https://example.com/', 'https://example.com/' ),
array( '//example.com', 'http://example.com' ),
array( '//example.com/', 'http://example.com/' ),
array( 'http://example.com/?foo=http://example.com/', 'http://example.com/?foo=http://example.com/' ),
array( 'http://user@example.com/', 'http://user@example.com/' ),
array( 'http://user:@example.com/', 'http://user:@example.com/' ),
array( 'http://user:pass@example.com/', 'http://user:pass@example.com/' ),
);
}
function invalid_url_provider() {
return array(
// parse_url() fails
array( '' ),
array( 'http://:' ),
// non-safelisted domain
array( 'http://non-safelisted.example/' ),
// unsupported schemes
array( 'data:text/plain;charset=utf-8,Hello%20World!' ),
array( 'file:///etc/passwd' ),
array( 'ftp://example.com/' ),
// malformed input
array( 'http:example.com' ),
array( 'http:80' ),
array( 'http://example.com:1234:5678/' ),
array( 'http://user:pa:ss@example.com/' ),
array( 'http://user@@example.com' ),
array( 'http://user@:example.com' ),
array( 'http://user?@example.com' ),
array( 'http://user@?example.com' ),
array( 'http://user#@example.com' ),
array( 'http://user@#example.com' ),
array( 'http://user@@example.com/' ),
array( 'http://user@:example.com/' ),
array( 'http://user?@example.com/' ),
array( 'http://user@?example.com/' ),
array( 'http://user#@example.com/' ),
array( 'http://user@#example.com/' ),
array( 'http://user:pass@@example.com' ),
array( 'http://user:pass@:example.com' ),
array( 'http://user:pass?@example.com' ),
array( 'http://user:pass@?example.com' ),
array( 'http://user:pass#@example.com' ),
array( 'http://user:pass@#example.com' ),
array( 'http://user:pass@@example.com/' ),
array( 'http://user:pass@:example.com/' ),
array( 'http://user:pass?@example.com/' ),
array( 'http://user:pass@?example.com/' ),
array( 'http://user:pass#@example.com/' ),
array( 'http://user:pass@#example.com/' ),
array( 'http://user.pass@@example.com' ),
array( 'http://user.pass@:example.com' ),
array( 'http://user.pass?@example.com' ),
array( 'http://user.pass@?example.com' ),
array( 'http://user.pass#@example.com' ),
array( 'http://user.pass@#example.com' ),
array( 'http://user.pass@@example.com/' ),
array( 'http://user.pass@:example.com/' ),
array( 'http://user.pass?@example.com/' ),
array( 'http://user.pass@?example.com/' ),
array( 'http://user.pass#@example.com/' ),
array( 'http://user.pass@#example.com/' ),
);
}
}