Changeset 56895

Timestamp:

10/12/2023 04:07:43 PM (14 months ago)

Author:

joemcgill

Message:

Grouped backports to the 6.2 branch.

• REST API: Limit search_columns for users without list_users.
• Comments: Prevent users who can not see a post from seeing comments on it.
• Application Passwords: Prevent the use of some pseudo protocols in application passwords.
• Restrict media shortcode ajax to certain type
• REST API: Ensure no-cache headers are sent when methods are overriden.
• Prevent unintended behavior when certain objects are unserialized.

Merges [56833], [56834], [56835], [56836], [56837], and [56838] to the 6.2 branch.
Props xknown, jorbin, Vortfu, joehoyle, timothyblynjacobs, peterwilsoncc, ehtis, tykoted, martinkrcho, paulkevan, dd32, antpb, rmccue.

Location:

branches/6.2

Files:

• . (modified) (1 prop)
• src/wp-admin/includes/ajax-actions.php (modified) (2 diffs)
• src/wp-admin/includes/class-wp-comments-list-table.php (modified) (1 diff)
• src/wp-admin/includes/class-wp-list-table.php (modified) (1 diff)
• src/wp-admin/includes/dashboard.php (modified) (1 diff)
• src/wp-admin/includes/user.php (modified) (3 diffs)
• src/wp-includes/Requests/src/Hooks.php (modified) (1 diff)
• src/wp-includes/Requests/src/Iri.php (modified) (1 diff)
• src/wp-includes/Requests/src/Session.php (modified) (1 diff)
• src/wp-includes/class-wp-block-patterns-registry.php (modified) (1 diff)
• src/wp-includes/class-wp-block-type-registry.php (modified) (1 diff)
• src/wp-includes/class-wp-theme.php (modified) (2 diffs)
• src/wp-includes/media.php (modified) (4 diffs)
• src/wp-includes/rest-api.php (modified) (1 diff)
• src/wp-includes/rest-api/class-wp-rest-server.php (modified) (3 diffs)
• src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php (modified) (1 diff)
• src/wp-includes/shortcodes.php (modified) (1 diff)

branches/6.2/src/wp-admin/includes/ajax-actions.php

@@ -3856 +3856 @@
     $shortcode = wp_unslash( $_POST['shortcode'] );
 
+    // Only process previews for media related shortcodes:
+    $found_shortcodes = get_shortcode_tags_in_content( $shortcode );
+    $media_shortcodes = array(
+        'audio',
+        'embed',
+        'playlist',
+        'video',
+        'gallery',
+    );
+
+    $other_shortcodes = array_diff( $found_shortcodes, $media_shortcodes );
+
+    if ( ! empty( $other_shortcodes ) ) {
+        wp_send_json_error();
+    }
+
     if ( ! empty( $_POST['post_ID'] ) ) {
         $post = get_post( (int) $_POST['post_ID'] );
@@ -3862 +3878 @@
     // The embed shortcode requires a post.
     if ( ! $post || ! current_user_can( 'edit_post', $post->ID ) ) {
-        if ( 'embed' === $shortcode ) {
+        if ( in_array( 'embed', $found_shortcodes, true ) ) {
             wp_send_json_error();
         }

branches/6.2/src/wp-admin/includes/class-wp-comments-list-table.php

@@ -641 +641 @@
 
         $this->user_can = current_user_can( 'edit_comment', $comment->comment_ID );
+
+        $edit_post_cap = $post ? 'edit_post' : 'edit_posts';
+        if (
+            current_user_can( $edit_post_cap, $comment->comment_post_ID ) ||
+            (
+                empty( $post->post_password ) &&
+                current_user_can( 'read_post', $comment->comment_post_ID )
+            )
+        ) {
+            // The user has access to the post
+        } else {
+            return false;
+        }
 
         echo "<tr id='comment-$comment->comment_ID' class='$the_comment_class'>";

branches/6.2/src/wp-admin/includes/class-wp-list-table.php

@@ -818 +818 @@
             $pending_comments_number
         );
+
+        $post_object   = get_post( $post_id );
+        $edit_post_cap = $post_object ? 'edit_post' : 'edit_posts';
+        if (
+            current_user_can( $edit_post_cap, $post_id ) ||
+            (
+                empty( $post_object->post_password ) &&
+                current_user_can( 'read_post', $post_id )
+            )
+        ) {
+            // The user has access to the post and thus can see comments
+        } else {
+            return false;
+        }
 
         if ( ! $approved_comments && ! $pending_comments ) {

branches/6.2/src/wp-admin/includes/dashboard.php

@@ -1102 +1102 @@
         echo '<ul id="the-comment-list" data-wp-lists="list:comment">';
         foreach ( $comments as $comment ) {
-            _wp_dashboard_recent_comments_row( $comment );
+
+            $comment_post = get_post( $comment->comment_post_ID );
+            if (
+                current_user_can( 'edit_post', $comment->comment_post_ID ) ||
+                (
+                    empty( $comment_post->post_password ) &&
+                    current_user_can( 'read_post', $comment->comment_post_ID )
+                )
+            ) {
+                _wp_dashboard_recent_comments_row( $comment );
+            }
         }
         echo '</ul>';

branches/6.2/src/wp-admin/includes/user.php

@@ -614 +614 @@
  * @since 5.6.0
  * @since 6.2.0 Allow insecure HTTP connections for the local environment.
+ * @since 6.3.2 Validates the success and reject URLs to prevent javascript pseudo protocol being executed.
  *
  * @param array   $request {
@@ -627 +628 @@
  */
 function wp_is_authorize_application_password_request_valid( $request, $user ) {
-    $error    = new WP_Error();
-    $is_local = 'local' === wp_get_environment_type();
-
-    if ( ! empty( $request['success_url'] ) ) {
-        $scheme = wp_parse_url( $request['success_url'], PHP_URL_SCHEME );
-
-        if ( 'http' === $scheme && ! $is_local ) {
+    $error = new WP_Error();
+
+    if ( isset( $request['success_url'] ) ) {
+        $validated_success_url = wp_is_authorize_application_redirect_url_valid( $request['success_url'] );
+        if ( is_wp_error( $validated_success_url ) ) {
             $error->add(
-                'invalid_redirect_scheme',
-                __( 'The success URL must be served over a secure connection.' )
+                $validated_success_url->get_error_code(),
+                $validated_success_url->get_error_message()
             );
         }
     }
 
-    if ( ! empty( $request['reject_url'] ) ) {
-        $scheme = wp_parse_url( $request['reject_url'], PHP_URL_SCHEME );
-
-        if ( 'http' === $scheme && ! $is_local ) {
+    if ( isset( $request['reject_url'] ) ) {
+        $validated_reject_url = wp_is_authorize_application_redirect_url_valid( $request['reject_url'] );
+        if ( is_wp_error( $validated_reject_url ) ) {
             $error->add(
-                'invalid_redirect_scheme',
-                __( 'The rejection URL must be served over a secure connection.' )
+                $validated_reject_url->get_error_code(),
+                $validated_reject_url->get_error_message()
             );
         }
@@ -676 +674 @@
     return true;
 }
+
+/**
+ * Validates the redirect URL protocol scheme. The protocol can be anything except http and javascript.
+ *
+ * @since 6.3.2
+ *
+ * @param string $url - The redirect URL to be validated.
+ *
+ * @return true|WP_Error True if the redirect URL is valid, a WP_Error object otherwise.
+ */
+function wp_is_authorize_application_redirect_url_valid( $url ) {
+    $bad_protocols = array( 'javascript', 'data' );
+    if ( empty( $url ) ) {
+        return true;
+    }
+
+    // Based on https://www.rfc-editor.org/rfc/rfc2396#section-3.1
+    $valid_scheme_regex = '/^[a-zA-Z][a-zA-Z0-9+.-]*:/';
+    if ( ! preg_match( $valid_scheme_regex, $url ) ) {
+        return new WP_Error(
+            'invalid_redirect_url_format',
+            __( 'Invalid URL format.' )
+        );
+    }
+
+    /**
+     * Filters the list of invalid protocols used in applications redirect URLs.
+     *
+     * @since 6.3.2
+     *
+     * @param string[]  $bad_protocols Array of invalid protocols.
+     * @param string    $url The redirect URL to be validated.
+     */
+    $invalid_protocols = array_map( 'strtolower', apply_filters( 'wp_authorize_application_redirect_url_invalid_protocols', $bad_protocols, $url ) );
+
+    $scheme   = wp_parse_url( $url, PHP_URL_SCHEME );
+    $host     = wp_parse_url( $url, PHP_URL_HOST );
+    $is_local = 'local' === wp_get_environment_type();
+
+    // validates if the proper URI format is applied to the $url
+    if ( empty( $host ) || empty( $scheme ) || in_array( strtolower( $scheme ), $invalid_protocols, true ) ) {
+        return new WP_Error(
+            'invalid_redirect_url_format',
+            __( 'Invalid URL format.' )
+        );
+    }
+
+    if ( 'http' === $scheme && ! $is_local ) {
+        return new WP_Error(
+            'invalid_redirect_scheme',
+            __( 'The URL must be served over a secure connection.' )
+        );
+    }
+
+    return true;
+}

branches/6.2/src/wp-includes/Requests/src/Hooks.php

@@ -97 +97 @@
         return true;
     }
+
+    public function __wakeup() {
+        throw new \LogicException( __CLASS__ . ' should never be unserialized' );
+    }
 }

branches/6.2/src/wp-includes/Requests/src/Iri.php

@@ -718 +718 @@
     }
 
+    public function __wakeup() {
+        $class_props = get_class_vars( __CLASS__ );
+        $string_props = array( 'scheme', 'iuserinfo', 'ihost', 'port', 'ipath', 'iquery', 'ifragment' );
+        $array_props = array( 'normalization' );
+        foreach ( $class_props as $prop => $default_value ) {
+            if ( in_array( $prop, $string_props, true ) && ! is_string( $this->$prop ) ) {
+                throw new UnexpectedValueException();
+            } elseif ( in_array( $prop, $array_props, true ) && ! is_array( $this->$prop ) ) {
+                throw new UnexpectedValueException();
+            }
+            $this->$prop = null;
+        }
+    }
+
     /**
      * Set the entire IRI. Returns true on success, false on failure (if there

branches/6.2/src/wp-includes/Requests/src/Session.php

@@ -266 +266 @@
     }
 
+    public function __wakeup() {
+        throw new \LogicException( __CLASS__ . ' should never be unserialized' );
+    }
+
     /**
      * Merge a request's data with the default data

branches/6.2/src/wp-includes/class-wp-block-patterns-registry.php

@@ -198 +198 @@
     }
 
+    public function __wakeup() {
+        if ( ! $this->registered_patterns ) {
+            return;
+        }
+        if ( ! is_array( $this->registered_patterns ) ) {
+            throw new UnexpectedValueException();
+        }
+        foreach ( $this->registered_patterns as $value ) {
+            if ( ! is_array( $value ) ) {
+                throw new UnexpectedValueException();
+            }
+        }
+        $this->registered_patterns_outside_init = array();
+    }
+
     /**
      * Utility method to retrieve the main instance of the class.

branches/6.2/src/wp-includes/class-wp-block-type-registry.php

@@ -169 +169 @@
     }
 
+    public function __wakeup() {
+        if ( ! $this->registered_block_types ) {
+            return;
+        }
+        if ( ! is_array( $this->registered_block_types ) ) {
+            throw new UnexpectedValueException();
+        }
+        foreach ( $this->registered_block_types as $value ) {
+            if ( ! $value instanceof WP_Block_Type ) {
+                throw new UnexpectedValueException();
+            }
+        }
+    }
+
     /**
      * Utility method to retrieve the main instance of the class.

branches/6.2/src/wp-includes/class-wp-theme.php

@@ -741 +741 @@
 
     /**
+     * Perform reinitialization tasks.
+     *
+     * Prevents a callback from being injected during unserialization of an object.
+     *
+     * @return void
+     */
+    public function __wakeup() {
+        if ( $this->parent && ! $this->parent instanceof self ) {
+            throw new UnexpectedValueException();
+        }
+        if ( $this->headers && ! is_array( $this->headers ) ) {
+            throw new UnexpectedValueException();
+        }
+        foreach ( $this->headers as $value ) {
+            if ( ! is_string( $value ) ) {
+                throw new UnexpectedValueException();
+            }
+        }
+        $this->headers_sanitized = array();
+    }
+
+    /**
      * Adds theme data to cache.
      *
@@ -1809 +1831 @@
         return strnatcasecmp( $a->name_translated, $b->name_translated );
     }
+
+    private static function _check_headers_property_has_correct_type( $headers ) {
+        if ( ! is_array( $headers ) ) {
+            return false;
+        }
+        foreach ( $headers as $key => $value ) {
+            if ( ! is_string( $key ) || ! is_string( $value ) ) {
+                return false;
+            }
+        }
+        return true;
+    }
 }

branches/6.2/src/wp-includes/media.php

@@ -2460 +2460 @@
         }
     } elseif ( ! empty( $atts['exclude'] ) ) {
+        $post_parent_id = $id;
         $attachments = get_children(
             array(
@@ -2472 +2473 @@
         );
     } else {
+        $post_parent_id = $id;
         $attachments = get_children(
             array(
@@ -2482 +2484 @@
             )
         );
+    }
+
+    if ( ! empty( $post_parent_id ) ) {
+        $post_parent = get_post( $post_parent_id );
+
+        // terminate the shortcode execution if user cannot read the post or password-protected
+        if (
+        ( ! is_post_publicly_viewable( $post_parent->ID ) && ! current_user_can( 'read_post', $post_parent->ID ) )
+        || post_password_required( $post_parent ) ) {
+            return '';
+        }
     }
 
@@ -2816 +2829 @@
     }
 
+    if ( ! empty( $args['post_parent'] ) ) {
+        $post_parent = get_post( $id );
+
+        // terminate the shortcode execution if user cannot read the post or password-protected
+        if ( ! current_user_can( 'read_post', $post_parent->ID ) || post_password_required( $post_parent ) ) {
+            return '';
+        }
+    }
+
     if ( empty( $attachments ) ) {
         return '';

branches/6.2/src/wp-includes/rest-api.php

@@ -1069 +1069 @@
 
     if ( ! $result ) {
+        add_filter( 'rest_send_nocache_headers', '__return_true', 20 );
         return new WP_Error( 'rest_cookie_invalid_nonce', __( 'Cookie check failed' ), array( 'status' => 403 ) );
     }

branches/6.2/src/wp-includes/rest-api/class-wp-rest-server.php

@@ -360 +360 @@
 
         /**
-         * Filters whether to send nocache headers on a REST API request.
-         *
-         * @since 4.4.0
-         *
-         * @param bool $rest_send_nocache_headers Whether to send no-cache headers.
-         */
-        $send_no_cache_headers = apply_filters( 'rest_send_nocache_headers', is_user_logged_in() );
-        if ( $send_no_cache_headers ) {
-            foreach ( wp_get_nocache_headers() as $header => $header_value ) {
-                if ( empty( $header_value ) ) {
-                    $this->remove_header( $header );
-                } else {
-                    $this->send_header( $header, $header_value );
-                }
-            }
-        }
-
-        /**
          * Filters whether the REST API is enabled.
          *
@@ -431 +413 @@
          * header.
          */
+        $method_overridden = false;
         if ( isset( $_GET['_method'] ) ) {
             $request->set_method( $_GET['_method'] );
         } elseif ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) {
             $request->set_method( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] );
+            $method_overridden = true;
         }
 
@@ -493 +477 @@
          */
         $served = apply_filters( 'rest_pre_serve_request', false, $result, $request, $this );
+
+        /**
+         * Filters whether to send nocache headers on a REST API request.
+         *
+         * @since 4.4.0
+         * @since 6.x.x Moved the block to catch the filter added on rest_cookie_check_errors() from rest-api.php
+         *
+         * @param bool $rest_send_nocache_headers Whether to send no-cache headers.
+         */
+        $send_no_cache_headers = apply_filters( 'rest_send_nocache_headers', is_user_logged_in() );
+
+        // send no cache headers if the $send_no_cache_headers is true
+        // OR if the HTTP_X_HTTP_METHOD_OVERRIDE is used but resulted a 4xx response code.
+        if ( $send_no_cache_headers || ( true === $method_overridden && strpos( $code, '4' ) === 0 ) ) {
+            foreach ( wp_get_nocache_headers() as $header => $header_value ) {
+                if ( empty( $header_value ) ) {
+                    $this->remove_header( $header );
+                } else {
+                    $this->send_header( $header, $header_value );
+                }
+            }
+        }
 
         if ( ! $served ) {

branches/6.2/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

@@ -319 +319 @@
 
         if ( ! empty( $prepared_args['search'] ) ) {
+            if ( ! current_user_can( 'list_users' ) ) {
+                $prepared_args['search_columns'] = array( 'ID', 'user_login', 'user_nicename', 'display_name' );
+            }
             $prepared_args['search'] = '*' . $prepared_args['search'] . '*';
         }

branches/6.2/src/wp-includes/shortcodes.php

@@ -167 +167 @@
     }
     return false;
+}
+
+/**
+ * Returns a list of registered shortcode names found in the given content.
+ *
+ * Example usage:
+ *
+ *     get_shortcode_tags_in_content( '[audio src="file.mp3"][/audio] [foo] [gallery ids="1,2,3"]' );
+ *     // array( 'audio', 'gallery' )
+ *
+ * @since 6.3.2
+ *
+ * @param string $content The content to check.
+ * @return string[] An array of registered shortcode names found in the content.
+ */
+function get_shortcode_tags_in_content( $content ) {
+    if ( false === strpos( $content, '[' ) ) {
+        return array();
+    }
+
+    preg_match_all( '/' . get_shortcode_regex() . '/', $content, $matches, PREG_SET_ORDER );
+    if ( empty( $matches ) ) {
+        return array();
+    }
+
+    $tags = array();
+    foreach ( $matches as $shortcode ) {
+        $tags[] = $shortcode[2];
+
+        if ( ! empty( $shortcode[5] ) ) {
+            $deep_tags = get_shortcode_tags_in_content( $shortcode[5] );
+            if ( ! empty( $deep_tags ) ) {
+                $tags = array_merge( $tags, $deep_tags );
+            }
+        }
+    }
+
+    return $tags;
 }