Issues in Explorer.php (master) - Issues in master - alexdebril/feed-io - Measure and Improve Code Quality continuously with Scrutinizer

Issues (38)

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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.

Unfortunately, the security analysis is currently not available for your project. If you are a non-commercial open-source project, please contact support to gain access.

src/FeedIo/Explorer.php (1 issue)

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Bug 1

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Major 1

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<?php declare(strict_types=1);
/*
 * This file is part of the feed-io package.
 *
 * (c) Alexandre Debril <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace FeedIo;

use FeedIo\Adapter\ClientInterface;
use Psr\Log\LoggerInterface;

class Explorer
{

    /**
     * @var \FeedIo\Adapter\ClientInterface;
     */
    protected $client;

    /**
     * @var \Psr\Log\LoggerInterface
     */
    protected $logger;

    const VALID_TYPES = [
        'application/atom+xml',
        'application/rss+xml'
    ];

    /**
     * @param \FeedIo\Adapter\ClientInterface $client
     * @param \Psr\Log\LoggerInterface        $logger
     */
    public function __construct(ClientInterface $client, LoggerInterface $logger)
    {
        $this->client = $client;
        $this->logger = $logger;
    }

    /**
     * Discover feeds from the webpage's headers
     * @param  string $url
     * @return array
     */
    public function discover(string $url) : array
    {
        $this->logger->info("discover feeds from {$url}");
        $stream = $this->client->getResponse($url, new \DateTime('@0'));

        $internalErrors = libxml_use_internal_errors(true);
        if (LIBXML_VERSION < 20900) {
            $entityLoaderDisabled = libxml_disable_entity_loader(true);
        }

        $feeds = $this->extractFeeds($stream->getBody());

        libxml_use_internal_errors($internalErrors);
        if (LIBXML_VERSION < 20900) {
            libxml_disable_entity_loader($entityLoaderDisabled);
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

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

    // $x is potentially undefined here.
    echo $x;
}
        }

        return $feeds;
    }

    /**
     * Extract feeds Urls from HTML stream
     * @param  string $html
     * @return array
     */
    protected function extractFeeds(string $html) : array
    {
        $dom = new \DOMDocument();
        $dom->loadHTML($html);

        $links = $dom->getElementsByTagName('link');
        $feeds = [];
        foreach ($links as $link) {
            if ($this->isFeedLink($link)) {
                $feeds[] = $link->getAttribute('href');
            }
        }

        return $feeds;
    }

    /**
     * Tells if the given Element contains a valid Feed Url
     * @param  DomElement $element
     * @return bool
     */
    protected function isFeedLink(\DomElement $element) : bool
    {
        return $element->hasAttribute('type')
                && in_array($element->getAttribute('type'), self::VALID_TYPES);
    }
}


1		<?php declare(strict_types=1);
2		/*
3		* This file is part of the feed-io package.
4		*
5		* (c) Alexandre Debril <[email protected]>
6		*
7		* For the full copyright and license information, please view the LICENSE
8		* file that was distributed with this source code.
9		*/
10
11		namespace FeedIo;
12
13		use FeedIo\Adapter\ClientInterface;
14		use Psr\Log\LoggerInterface;
15
16		class Explorer
17		{
18
19		/**
20		* @var \FeedIo\Adapter\ClientInterface;
21		*/
22		protected $client;
23
24		/**
25		* @var \Psr\Log\LoggerInterface
26		*/
27		protected $logger;
28
29		const VALID_TYPES = [
30		'application/atom+xml',
31		'application/rss+xml'
32		];
33
34		/**
35		* @param \FeedIo\Adapter\ClientInterface $client
36		* @param \Psr\Log\LoggerInterface $logger
37		*/
38	1	public function __construct(ClientInterface $client, LoggerInterface $logger)
39		{
40	1	$this->client = $client;
41	1	$this->logger = $logger;
42	1	}
43
44		/**
45		* Discover feeds from the webpage's headers
46		* @param string $url
47		* @return array
48		*/
49	1	public function discover(string $url) : array
50		{
51	1	$this->logger->info("discover feeds from {$url}");
52	1	$stream = $this->client->getResponse($url, new \DateTime('@0'));
53
54	1	$internalErrors = libxml_use_internal_errors(true);
55	1	if (LIBXML_VERSION < 20900) {
56		$entityLoaderDisabled = libxml_disable_entity_loader(true);
57		}
58
59	1	$feeds = $this->extractFeeds($stream->getBody());
60
61	1	libxml_use_internal_errors($internalErrors);
62	1	if (LIBXML_VERSION < 20900) {
63		libxml_disable_entity_loader($entityLoaderDisabled);
		0 ignored issues – show Bug introduced 2020-09-30 12:29 UTC by Report Bug Copy Issue Report Show Similar Issues like this The variable `$entityLoaderDisabled` does not seem to be defined for all execution paths leading up to this point. If you define a variable conditionally, it can happen that it is not defined for all execution paths. Let’s take a look at an example: function myFunction($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...
64		}
65
66	1	return $feeds;
67		}
68
69		/**
70		* Extract feeds Urls from HTML stream
71		* @param string $html
72		* @return array
73		*/
74	1	protected function extractFeeds(string $html) : array
75		{
76	1	$dom = new \DOMDocument();
77	1	$dom->loadHTML($html);
78
79	1	$links = $dom->getElementsByTagName('link');
80	1	$feeds = [];
81	1	foreach ($links as $link) {
82	1	if ($this->isFeedLink($link)) {
83	1	$feeds[] = $link->getAttribute('href');
84		}
85		}
86
87	1	return $feeds;
88		}
89
90		/**
91		* Tells if the given Element contains a valid Feed Url
92		* @param DomElement $element
93		* @return bool
94		*/
95	1	protected function isFeedLink(\DomElement $element) : bool
96		{
97	1	return $element->hasAttribute('type')
98	1	&& in_array($element->getAttribute('type'), self::VALID_TYPES);
99		}
100		}
101

alexdebril / feed-io

Issues (38)

Security Analysis not enabled

src/FeedIo/Explorer.php (1 issue)

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