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<title>[46493] branches/4.9: Backporting several bug fixes.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/46493">46493</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/46493","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>whyisjake</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2019-10-14 18:38:34 +0000 (Mon, 14 Oct 2019)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Backporting several bug fixes.

- Query: Remove the static query property.
- HTTP API: Protect against hex interpretation.
- Filesystem API: Prevent directory travelersals when creating new folders.
- Administration: Ensure that admin referer nonce is valid.
- REST API: Send a Vary: Origin header on GET requests.

Backports <a href="https://core.trac.wordpress.org/changeset/46474">[46474]</a>, <a href="https://core.trac.wordpress.org/changeset/46475">[46475]</a>, <a href="https://core.trac.wordpress.org/changeset/46476">[46476]</a>, <a href="https://core.trac.wordpress.org/changeset/46477">[46477]</a>, <a href="https://core.trac.wordpress.org/changeset/46478">[46478]</a>, <a href="https://core.trac.wordpress.org/changeset/46483">[46483]</a>, <a href="https://core.trac.wordpress.org/changeset/46485">[46485]</a> to the 5.0 branch.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches49srcwpincludesclasswpqueryphp">branches/4.9/src/wp-includes/class-wp-query.php</a></li>
<li><a href="#branches49srcwpincludesclasswpphp">branches/4.9/src/wp-includes/class-wp.php</a></li>
<li><a href="#branches49srcwpincludesfunctionsphp">branches/4.9/src/wp-includes/functions.php</a></li>
<li><a href="#branches49srcwpincludeshttpphp">branches/4.9/src/wp-includes/http.php</a></li>
<li><a href="#branches49srcwpincludespluggablephp">branches/4.9/src/wp-includes/pluggable.php</a></li>
<li><a href="#branches49srcwpincludesrestapiphp">branches/4.9/src/wp-includes/rest-api.php</a></li>
<li><a href="#branches49testsphpunittestsauthphp">branches/4.9/tests/phpunit/tests/auth.php</a></li>
<li><a href="#branches49testsphpunittestsqueryvarsphp">branches/4.9/tests/phpunit/tests/query/vars.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="branches49srcwpincludesclasswpqueryphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/src/wp-includes/class-wp-query.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/src/wp-includes/class-wp-query.php   2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/src/wp-includes/class-wp-query.php     2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -529,7 +529,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        , 'attachment'
</span><span class="cx" style="display: block; padding: 0 10px">                        , 'attachment_id'
</span><span class="cx" style="display: block; padding: 0 10px">                        , 'name'
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        , 'static'
</del><span class="cx" style="display: block; padding: 0 10px">                         , 'pagename'
</span><span class="cx" style="display: block; padding: 0 10px">                        , 'page_id'
</span><span class="cx" style="display: block; padding: 0 10px">                        , 'second'
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -764,7 +763,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        // If year, month, day, hour, minute, and second are set, a single
</span><span class="cx" style="display: block; padding: 0 10px">                        // post is being queried.
</span><span class="cx" style="display: block; padding: 0 10px">                        $this->is_single = true;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                } elseif ( '' != $qv['static'] || '' != $qv['pagename'] || !empty($qv['page_id']) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         } elseif ( '' != $qv['pagename'] || !empty($qv['page_id']) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         $this->is_page = true;
</span><span class="cx" style="display: block; padding: 0 10px">                        $this->is_single = false;
</span><span class="cx" style="display: block; padding: 0 10px">                } else {
</span></span></pre></div>
<a id="branches49srcwpincludesclasswpphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/src/wp-includes/class-wp.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/src/wp-includes/class-wp.php 2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/src/wp-includes/class-wp.php   2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -14,7 +14,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 2.0.0
</span><span class="cx" style="display: block; padding: 0 10px">         * @var array
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public $public_query_vars = array('m', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'static', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><span class="cx" style="display: block; padding: 0 10px">         * Private query variables.
</span></span></pre></div>
<a id="branches49srcwpincludesfunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/src/wp-includes/functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/src/wp-includes/functions.php        2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/src/wp-includes/functions.php  2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1613,6 +1613,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">        if ( file_exists( $target ) )
</span><span class="cx" style="display: block; padding: 0 10px">                return @is_dir( $target );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        // Do not allow path traversals.
+       if ( false !== strpos( $target, '../' ) || false !== strpos( $target, '..' . DIRECTORY_SEPARATOR ) ) {
+               return false;
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         // We need to find the permissions of the parent folder that exists and inherit that.
</span><span class="cx" style="display: block; padding: 0 10px">        $target_parent = dirname( $target );
</span><span class="cx" style="display: block; padding: 0 10px">        while ( '.' != $target_parent && ! is_dir( $target_parent ) && dirname( $target_parent ) !== $target_parent ) {
</span></span></pre></div>
<a id="branches49srcwpincludeshttpphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/src/wp-includes/http.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/src/wp-includes/http.php     2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/src/wp-includes/http.php       2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -541,8 +541,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        $ip = $host;
</span><span class="cx" style="display: block; padding: 0 10px">                } else {
</span><span class="cx" style="display: block; padding: 0 10px">                        $ip = gethostbyname( $host );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( $ip === $host ) // Error condition for gethostbyname()
-                               $ip = false;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( $ip === $host ) { // Error condition for gethostbyname()
+                               return false;
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">                if ( $ip ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $parts = array_map( 'intval', explode( '.', $ip ) );
</span></span></pre></div>
<a id="branches49srcwpincludespluggablephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/src/wp-includes/pluggable.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/src/wp-includes/pluggable.php        2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/src/wp-includes/pluggable.php  2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1079,7 +1079,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  *                   0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function check_admin_referer( $action = -1, $query_arg = '_wpnonce' ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( -1 == $action )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( -1 === $action )
</ins><span class="cx" style="display: block; padding: 0 10px">                 _doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action to be verified by using the first parameter.' ), '3.2.0' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        $adminurl = strtolower(admin_url());
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1097,7 +1097,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        do_action( 'check_admin_referer', $action, $result );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( ! $result && ! ( -1 == $action && strpos( $referer, $adminurl ) === 0 ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! $result && ! ( -1 === $action && strpos( $referer, $adminurl ) === 0 ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 wp_nonce_ays( $action );
</span><span class="cx" style="display: block; padding: 0 10px">                die();
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2645,4 +2645,3 @@
</span><span class="cx" style="display: block; padding: 0 10px">        return $r;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> endif;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
</del></span></pre></div>
<a id="branches49srcwpincludesrestapiphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/src/wp-includes/rest-api.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/src/wp-includes/rest-api.php 2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/src/wp-includes/rest-api.php   2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -544,7 +544,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                header( 'Access-Control-Allow-Origin: ' . $origin );
</span><span class="cx" style="display: block; padding: 0 10px">                header( 'Access-Control-Allow-Methods: OPTIONS, GET, POST, PUT, PATCH, DELETE' );
</span><span class="cx" style="display: block; padding: 0 10px">                header( 'Access-Control-Allow-Credentials: true' );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                header( 'Vary: Origin' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         header( 'Vary: Origin', false );
+       } elseif ( ! headers_sent() && 'GET' === $_SERVER['REQUEST_METHOD'] && ! is_user_logged_in() ) {
+               header( 'Vary: Origin', false );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return $value;
</span></span></pre></div>
<a id="branches49testsphpunittestsauthphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/tests/phpunit/tests/auth.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/tests/phpunit/tests/auth.php 2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/tests/phpunit/tests/auth.php   2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -163,6 +163,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">                unset( $_REQUEST['_wpnonce'] );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        public function test_check_admin_referer_with_default_action_as_string_not_doing_it_wrong() {
+               // A valid nonce needs to be set so the check doesn't die()
+               $_REQUEST['_wpnonce'] = wp_create_nonce( '-1' );
+               $result               = check_admin_referer( '-1' );
+               $this->assertSame( 1, $result );
+
+               unset( $_REQUEST['_wpnonce'] );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         /**
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 36361
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span></span></pre></div>
<a id="branches49testsphpunittestsqueryvarsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.9/tests/phpunit/tests/query/vars.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.9/tests/phpunit/tests/query/vars.php   2019-10-14 18:26:01 UTC (rev 46492)
+++ branches/4.9/tests/phpunit/tests/query/vars.php     2019-10-14 18:38:34 UTC (rev 46493)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -16,61 +16,64 @@
</span><span class="cx" style="display: block; padding: 0 10px">                // Re-initialise any dynamically-added public query vars:
</span><span class="cx" style="display: block; padding: 0 10px">                do_action( 'init' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $this->assertEquals( array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->assertEquals(
+                       array(
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Static public query vars:
-                       'm',
-                       'p',
-                       'posts',
-                       'w',
-                       'cat',
-                       'withcomments',
-                       'withoutcomments',
-                       's',
-                       'search',
-                       'exact',
-                       'sentence',
-                       'calendar',
-                       'page',
-                       'paged',
-                       'more',
-                       'tb',
-                       'pb',
-                       'author',
-                       'order',
-                       'orderby',
-                       'year',
-                       'monthnum',
-                       'day',
-                       'hour',
-                       'minute',
-                       'second',
-                       'name',
-                       'category_name',
-                       'tag',
-                       'feed',
-                       'author_name',
-                       'static',
-                       'pagename',
-                       'page_id',
-                       'error',
-                       'attachment',
-                       'attachment_id',
-                       'subpost',
-                       'subpost_id',
-                       'preview',
-                       'robots',
-                       'taxonomy',
-                       'term',
-                       'cpage',
-                       'post_type',
-                       'embed',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Static public query vars:
+                               'm',
+                               'p',
+                               'posts',
+                               'w',
+                               'cat',
+                               'withcomments',
+                               'withoutcomments',
+                               's',
+                               'search',
+                               'exact',
+                               'sentence',
+                               'calendar',
+                               'page',
+                               'paged',
+                               'more',
+                               'tb',
+                               'pb',
+                               'author',
+                               'order',
+                               'orderby',
+                               'year',
+                               'monthnum',
+                               'day',
+                               'hour',
+                               'minute',
+                               'second',
+                               'name',
+                               'category_name',
+                               'tag',
+                               'feed',
+                               'author_name',
+                               'pagename',
+                               'page_id',
+                               'error',
+                               'attachment',
+                               'attachment_id',
+                               'subpost',
+                               'subpost_id',
+                               'preview',
+                               'robots',
+                               'taxonomy',
+                               'term',
+                               'cpage',
+                               'post_type',
+                               'embed',
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Dynamically added public query vars:
-                       'post_format',
-                       'rest_route',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Dynamically added public query vars:
+                               'post_format',
+                               'rest_route',
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                ), $wp->public_query_vars, 'Care should be taken when introducing new public query vars. See https://core.trac.wordpress.org/ticket/35115' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 ),
+                       $wp->public_query_vars,
+                       'Care should be taken when introducing new public query vars. See https://core.trac.wordpress.org/ticket/35115'
+               );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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