Issues in SpecialApiHelp.php (master) - Issues in master - wikimedia/mediawiki - Measure and Improve Code Quality continuously with Scrutinizer

Issues (4122)

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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.

Code Injection

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

Response Splitting

Response Splitting can be used to send arbitrary responses.

File Inclusion

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.

Command Injection

Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.

SQL Injection

SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.

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

Other Vulnerability

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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includes/specials/SpecialApiHelp.php (3 issues)

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<?php
/**
 * Implements Special:ApiHelp
 *
 * 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 SpecialPage
 */

/**
 * Special page to redirect to API help pages, for situations where linking to
 * the api.php endpoint is not wanted.
 *
 * @ingroup SpecialPage
 */
class SpecialApiHelp extends UnlistedSpecialPage {
	public function __construct() {
		parent::__construct( 'ApiHelp' );
	}

	public function execute( $par ) {
		if ( empty( $par ) ) {
			$par = 'main';
		}

		// These come from transclusions
		$request = $this->getRequest();
		$options = [
			'action' => 'help',
			'nolead' => true,
			'submodules' => $request->getCheck( 'submodules' ),
			'recursivesubmodules' => $request->getCheck( 'recursivesubmodules' ),
			'title' => $request->getVal( 'title', $this->getPageTitle( '$1' )->getPrefixedText() ),
		];

		// These are for linking from wikitext, since url parameters are a pain
		// to do.
		while ( true ) {
			if ( substr( $par, 0, 4 ) === 'sub/' ) {
				$par = substr( $par, 4 );
				$options['submodules'] = 1;
				continue;
			}

			if ( substr( $par, 0, 5 ) === 'rsub/' ) {
				$par = substr( $par, 5 );
				$options['recursivesubmodules'] = 1;
				continue;
			}

			$moduleName = $par;
			break;
		}

		if ( !$this->including() ) {
			unset( $options['nolead'], $options['title'] );
			$options['modules'] = $moduleName;
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
			$link = wfAppendQuery( wfExpandUrl( wfScript( 'api' ), PROTO_CURRENT ), $options );

			$this->getOutput()->redirect( $link );
			return;
		}

		$main = new ApiMain( $this->getContext(), false );
		try {
			$module = $main->getModuleFromPath( $moduleName );
		} catch ( UsageException $ex ) {
			$this->getOutput()->addHTML( Html::rawElement( 'span', [ 'class' => 'error' ],
				$this->msg( 'apihelp-no-such-module', $moduleName )->inContentLanguage()->parse()
			) );
			return;
		}

		ApiHelp::getHelp( $this->getContext(), $module, $options );
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}
	}

	public function isIncludable() {
		return true;
	}
}


1			<?php
2			/**
3			* Implements Special:ApiHelp
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 SpecialPage
22			*/
23
24			/**
25			* Special page to redirect to API help pages, for situations where linking to
26			* the api.php endpoint is not wanted.
27			*
28			* @ingroup SpecialPage
29			*/
30			class SpecialApiHelp extends UnlistedSpecialPage {
31			public function __construct() {
32			parent::__construct( 'ApiHelp' );
33			}
34
35			public function execute( $par ) {
36			if ( empty( $par ) ) {
37			$par = 'main';
38			}
39
40			// These come from transclusions
41			$request = $this->getRequest();
42			$options = [
43			'action' => 'help',
44			'nolead' => true,
45			'submodules' => $request->getCheck( 'submodules' ),
46			'recursivesubmodules' => $request->getCheck( 'recursivesubmodules' ),
47			'title' => $request->getVal( 'title', $this->getPageTitle( '$1' )->getPrefixedText() ),
48			];
49
50			// These are for linking from wikitext, since url parameters are a pain
51			// to do.
52			while ( true ) {
53			if ( substr( $par, 0, 4 ) === 'sub/' ) {
54			$par = substr( $par, 4 );
55			$options['submodules'] = 1;
56			continue;
57			}
58
59			if ( substr( $par, 0, 5 ) === 'rsub/' ) {
60			$par = substr( $par, 5 );
61			$options['recursivesubmodules'] = 1;
62			continue;
63			}
64
65			$moduleName = $par;
66			break;
67			}
68
69			if ( !$this->including() ) {
70			unset( $options['nolead'], $options['title'] );
71			$options['modules'] = $moduleName;
			0 ignored issues – show Bug introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report Show Similar Issues like this The variable `$moduleName` does not seem to be defined for all execution paths leading up to this point. If you define a variable conditionally, it can happen that it is not defined for all execution paths. Let’s take a look at an example: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } // $x is potentially undefined here. echo $x; } In the above example, the variable `$x` is defined if you pass “foo” or “bar” as argument for `$a`. However, since the `switch` statement has no default case statement, if you pass any other value, the variable `$x` would be undefined. Available Fixes Check for existence of the variable explicitly: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } if (isset($x)) { // Make sure it's always set. echo $x; } } Define a default value for the variable: function myFunction($a) { $x = ''; // Set a default which gets overridden for certain paths. switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } echo $x; } Add a value for the missing path: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; // We add support for the missing case. default: $x = ''; break; } echo $x; } Loading history...
72			$link = wfAppendQuery( wfExpandUrl( wfScript( 'api' ), PROTO_CURRENT ), $options );
			0 ignored issues – show Security Bug introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like `wfExpandUrl(wfScript('api'), PROTO_CURRENT)` targeting `wfExpandUrl()` can also be of type `false`; however, `wfAppendQuery()` does only seem to accept `string`, did you maybe forget to handle an error condition? Loading history...
73			$this->getOutput()->redirect( $link );
74			return;
75			}
76
77			$main = new ApiMain( $this->getContext(), false );
78			try {
79			$module = $main->getModuleFromPath( $moduleName );
80			} catch ( UsageException $ex ) {
81			$this->getOutput()->addHTML( Html::rawElement( 'span', [ 'class' => 'error' ],
82			$this->msg( 'apihelp-no-such-module', $moduleName )->inContentLanguage()->parse()
83			) );
84			return;
85			}
86
87			ApiHelp::getHelp( $this->getContext(), $module, $options );
			0 ignored issues – show Bug introduced 2016-02-23 18:13 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like `$module` defined by `$main->getModuleFromPath($moduleName)` on line `79` can be `null`; however, `ApiHelp::getHelp()` does not accept `null`, maybe add an additional type check? Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: /** @return stdClass\|null */ function mayReturnNull() { } function doesNotAcceptNull(stdClass $x) { } // With potential error. function withoutCheck() { $x = mayReturnNull(); doesNotAcceptNull($x); // Potential error here. } // Safe - Alternative 1 function withCheck1() { $x = mayReturnNull(); if ( ! $x instanceof stdClass) { throw new \LogicException('$x must be defined.'); } doesNotAcceptNull($x); } // Safe - Alternative 2 function withCheck2() { $x = mayReturnNull(); if ($x instanceof stdClass) { doesNotAcceptNull($x); } } Loading history...
88			}
89
90			public function isIncludable() {
91			return true;
92			}
93			}
94

wikimedia / mediawiki

Issues (4122)

Security Analysis not enabled

includes/specials/SpecialApiHelp.php (3 issues)

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