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Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

File Exposure

File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.

File Manipulation

File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.

Object Injection

Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.

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Code Injection enables an attacker to execute arbitrary code on the server.

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Response Splitting can be used to send arbitrary responses.

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File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.

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XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

LDAP Injection

LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.

Header Injection

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This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.

Regex Injection

Regex Injection enables an attacker to execute arbitrary code in your PHP process.

XML Injection

XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

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maintenance/convertUserOptions.php (1 issue)

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Sam Reed 1

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<?php
/**
 * Convert user options to the new `user_properties` table.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup Maintenance
 */

require_once __DIR__ . '/Maintenance.php';

/**
 * Maintenance script to convert user options to the new `user_properties` table.
 *
 * @ingroup Maintenance
 */
class ConvertUserOptions extends Maintenance {

	private $mConversionCount = 0;

	public function __construct() {
		parent::__construct();
		$this->addDescription( 'Convert user options from old to new system' );
		$this->setBatchSize( 50 );
	}

	public function execute() {
		$this->output( "...batch conversion of user_options: " );
		$id = 0;
		$dbw = $this->getDB( DB_MASTER );

		if ( !$dbw->fieldExists( 'user', 'user_options', __METHOD__ ) ) {
			$this->output( "nothing to migrate. " );

			return;
		}
		while ( $id !== null ) {
			$res = $dbw->select( 'user',
				[ 'user_id', 'user_options' ],
				[
					'user_id > ' . $dbw->addQuotes( $id ),
					"user_options != " . $dbw->addQuotes( '' ),
				],
				__METHOD__,
				[
					'ORDER BY' => 'user_id',
					'LIMIT' => $this->mBatchSize,
				]
			);
			$id = $this->convertOptionBatch( $res, $dbw );

			wfWaitForSlaves();

			if ( $id ) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
				$this->output( "--Converted to ID $id\n" );
			}
		}
		$this->output( "done. Converted " . $this->mConversionCount . " user records.\n" );
	}

	/**
	 * @param ResultWrapper $res
	 * @param Database $dbw
	 * @return null|int
	 */
	function convertOptionBatch( $res, $dbw ) {
		$id = null;
		foreach ( $res as $row ) {
			$this->mConversionCount++;
			$insertRows = [];
			foreach ( explode( "\n", $row->user_options ) as $s ) {
				$m = [];
				if ( !preg_match( "/^(.[^=]*)=(.*)$/", $s, $m ) ) {
					continue;
				}

				// MW < 1.16 would save even default values. Filter them out
				// here (as in User) to avoid adding many unnecessary rows.
				$defaultOption = User::getDefaultOption( $m[1] );
				if ( is_null( $defaultOption ) || $m[2] != $defaultOption ) {
					$insertRows[] = [
						'up_user' => $row->user_id,
						'up_property' => $m[1],
						'up_value' => $m[2],
					];
				}
			}

			if ( count( $insertRows ) ) {
				$dbw->insert( 'user_properties', $insertRows, __METHOD__, [ 'IGNORE' ] );
			}

			$dbw->update(
				'user',
				[ 'user_options' => '' ],
				[ 'user_id' => $row->user_id ],
				__METHOD__
			);
			$id = $row->user_id;
		}

		return $id;
	}
}

$maintClass = "ConvertUserOptions";
require_once RUN_MAINTENANCE_IF_MAIN;


1			<?php
2			/**
3			* Convert user options to the new `user_properties` table.
4			*
5			* This program is free software; you can redistribute it and/or modify
6			* it under the terms of the GNU General Public License as published by
7			* the Free Software Foundation; either version 2 of the License, or
8			* (at your option) any later version.
9			*
10			* This program is distributed in the hope that it will be useful,
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			* GNU General Public License for more details.
14			*
15			* You should have received a copy of the GNU General Public License along
16			* with this program; if not, write to the Free Software Foundation, Inc.,
17			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18			* http://www.gnu.org/copyleft/gpl.html
19			*
20			* @file
21			* @ingroup Maintenance
22			*/
23
24			require_once __DIR__ . '/Maintenance.php';
25
26			/**
27			* Maintenance script to convert user options to the new `user_properties` table.
28			*
29			* @ingroup Maintenance
30			*/
31			class ConvertUserOptions extends Maintenance {
32
33			private $mConversionCount = 0;
34
35			public function __construct() {
36			parent::__construct();
37			$this->addDescription( 'Convert user options from old to new system' );
38			$this->setBatchSize( 50 );
39			}
40
41			public function execute() {
42			$this->output( "...batch conversion of user_options: " );
43			$id = 0;
44			$dbw = $this->getDB( DB_MASTER );
45
46			if ( !$dbw->fieldExists( 'user', 'user_options', __METHOD__ ) ) {
47			$this->output( "nothing to migrate. " );
48
49			return;
50			}
51			while ( $id !== null ) {
52			$res = $dbw->select( 'user',
53			[ 'user_id', 'user_options' ],
54			[
55			'user_id > ' . $dbw->addQuotes( $id ),
56			"user_options != " . $dbw->addQuotes( '' ),
57			],
58			__METHOD__,
59			[
60			'ORDER BY' => 'user_id',
61			'LIMIT' => $this->mBatchSize,
62			]
63			);
64			$id = $this->convertOptionBatch( $res, $dbw );
65
66			wfWaitForSlaves();
67
68			if ( $id ) {
			0 ignored issues – show Bug Best Practice introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report Show Similar Issues like this The expression `$id` of type `null\|integer` is loosely compared to `true`; this is ambiguous if the integer can be zero. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `integer` values, zero is a special case, in particular the following results might be unexpected: 0 == false // true 0 == null // true 123 == false // false 123 == null // false // It is often better to use strict comparison 0 === false // false 0 === null // false Loading history...
69			$this->output( "--Converted to ID $id\n" );
70			}
71			}
72			$this->output( "done. Converted " . $this->mConversionCount . " user records.\n" );
73			}
74
75			/**
76			* @param ResultWrapper $res
77			* @param Database $dbw
78			* @return null\|int
79			*/
80			function convertOptionBatch( $res, $dbw ) {
81			$id = null;
82			foreach ( $res as $row ) {
83			$this->mConversionCount++;
84			$insertRows = [];
85			foreach ( explode( "\n", $row->user_options ) as $s ) {
86			$m = [];
87			if ( !preg_match( "/^(.[^=])=(.)$/", $s, $m ) ) {
88			continue;
89			}
90
91			// MW < 1.16 would save even default values. Filter them out
92			// here (as in User) to avoid adding many unnecessary rows.
93			$defaultOption = User::getDefaultOption( $m[1] );
94			if ( is_null( $defaultOption ) \|\| $m[2] != $defaultOption ) {
95			$insertRows[] = [
96			'up_user' => $row->user_id,
97			'up_property' => $m[1],
98			'up_value' => $m[2],
99			];
100			}
101			}
102
103			if ( count( $insertRows ) ) {
104			$dbw->insert( 'user_properties', $insertRows, __METHOD__, [ 'IGNORE' ] );
105			}
106
107			$dbw->update(
108			'user',
109			[ 'user_options' => '' ],
110			[ 'user_id' => $row->user_id ],
111			__METHOD__
112			);
113			$id = $row->user_id;
114			}
115
116			return $id;
117			}
118			}
119
120			$maintClass = "ConvertUserOptions";
121			require_once RUN_MAINTENANCE_IF_MAIN;
122

wikimedia / mediawiki

Issues (4122)

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maintenance/convertUserOptions.php (1 issue)

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