Issues in Resolver.php (master) - Issues in master - ThrusterIO/dns - Measure and Improve Code Quality continuously with Scrutinizer

Issues (9)

Security Analysis no request data

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/Resolver.php (3 issues)

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<?php

namespace Thruster\Component\Dns;

use Thruster\Component\Dns\Exception\RecordNotFoundException;
use Thruster\Component\Promise\PromiseInterface;

class Resolver implements ResolverInterface
{
    /**
     * @var string
     */
    private $nameServer;

    /**
     * @var ExecutorInterface
     */
    private $executor;

    public function __construct(string $nameServer, ExecutorInterface $executor)
    {
        $this->nameServer = $nameServer;
        $this->executor = $executor;
    }

    public function resolve(string $domain) : PromiseInterface
    {
        $query = new Query($domain, Message::TYPE_A, Message::CLASS_IN, time());

        return $this->resolveInternal($this->nameServer, $query);
    }

    protected function resolveInternal(string $nameServer, Query $query)
    {
        return $this->executor
            ->query($nameServer, $query)
            ->then(
                function (Message $response) use ($query) {
                    return $this->extractAddress($query, $response);
                }
            );
    }

    private function extractAddress(Query $query, Message $response)
    {
        $answers = $response->answers;

        $addresses = $this->resolveAliases($answers, $query->getName());

        if (0 === count($addresses)) {
            throw new RecordNotFoundException('DNS Request did not return valid answer.');
        }

        $address = $addresses[array_rand($addresses)];

        return $address;
    }

    private function resolveAliases(array $answers, $name)
    {
        $named = $this->filterByName($answers, $name);
        $aRecords = $this->filterByType($named, Message::TYPE_A);
        $cnameRecords = $this->filterByType($named, Message::TYPE_CNAME);

        if ($aRecords) {

            return $this->mapRecordData($aRecords);
        }

        if ($cnameRecords) {

            $aRecords = array();

            $cnames = $this->mapRecordData($cnameRecords);
            foreach ($cnames as $cname) {
                $targets = $this->filterByName($answers, $cname);
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
                $aRecords = array_merge(
                    $aRecords,
                    $this->resolveAliases($answers, $cname)
                );
            }

            return $aRecords;
        }

        return array();
    }

    private function filterByName(array $answers, $name)
    {
        return $this->filterByField($answers, 'name', $name);
    }

    private function filterByType(array $answers, $type)
    {
        return $this->filterByField($answers, 'type', $type);
    }

    private function filterByField(array $answers, $field, $value)
    {
        return array_filter($answers, function ($answer) use ($field, $value) {
            $getter = 'get' . ucfirst($field);
            return $value === $answer->$getter();
        });
    }

    private function mapRecordData(array $records)
    {
        return array_map(function ($record) {
            return $record->getData();
        }, $records);
    }
}


1			<?php
2
3			namespace Thruster\Component\Dns;
4
5			use Thruster\Component\Dns\Exception\RecordNotFoundException;
6			use Thruster\Component\Promise\PromiseInterface;
7
8			class Resolver implements ResolverInterface
9			{
10			/**
11			* @var string
12			*/
13			private $nameServer;
14
15			/**
16			* @var ExecutorInterface
17			*/
18			private $executor;
19
20			public function __construct(string $nameServer, ExecutorInterface $executor)
21			{
22			$this->nameServer = $nameServer;
23			$this->executor = $executor;
24			}
25
26			public function resolve(string $domain) : PromiseInterface
27			{
28			$query = new Query($domain, Message::TYPE_A, Message::CLASS_IN, time());
29
30			return $this->resolveInternal($this->nameServer, $query);
31			}
32
33			protected function resolveInternal(string $nameServer, Query $query)
34			{
35			return $this->executor
36			->query($nameServer, $query)
37			->then(
38			function (Message $response) use ($query) {
39			return $this->extractAddress($query, $response);
40			}
41			);
42			}
43
44			private function extractAddress(Query $query, Message $response)
45			{
46			$answers = $response->answers;
47
48			$addresses = $this->resolveAliases($answers, $query->getName());
49
50			if (0 === count($addresses)) {
51			throw new RecordNotFoundException('DNS Request did not return valid answer.');
52			}
53
54			$address = $addresses[array_rand($addresses)];
55
56			return $address;
57			}
58
59			private function resolveAliases(array $answers, $name)
60			{
61			$named = $this->filterByName($answers, $name);
62			$aRecords = $this->filterByType($named, Message::TYPE_A);
63			$cnameRecords = $this->filterByType($named, Message::TYPE_CNAME);
64
65			if ($aRecords) {
			0 ignored issues – show Bug Best Practice introduced 2016-01-23 20:50 UTC by Report Bug Copy Issue Report Show Similar Issues like this The expression `$aRecords` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `! empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
66			return $this->mapRecordData($aRecords);
67			}
68
69			if ($cnameRecords) {
			0 ignored issues – show Bug Best Practice introduced 2016-01-23 20:50 UTC by Report Bug Copy Issue Report Show Similar Issues like this The expression `$cnameRecords` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `! empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
70			$aRecords = array();
71
72			$cnames = $this->mapRecordData($cnameRecords);
73			foreach ($cnames as $cname) {
74			$targets = $this->filterByName($answers, $cname);
			0 ignored issues – show Unused Code introduced 2016-01-23 20:50 UTC by Report Bug Copy Issue Report Show Similar Issues like this `$targets` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
75			$aRecords = array_merge(
76			$aRecords,
77			$this->resolveAliases($answers, $cname)
78			);
79			}
80
81			return $aRecords;
82			}
83
84			return array();
85			}
86
87			private function filterByName(array $answers, $name)
88			{
89			return $this->filterByField($answers, 'name', $name);
90			}
91
92			private function filterByType(array $answers, $type)
93			{
94			return $this->filterByField($answers, 'type', $type);
95			}
96
97			private function filterByField(array $answers, $field, $value)
98			{
99			return array_filter($answers, function ($answer) use ($field, $value) {
100			$getter = 'get' . ucfirst($field);
101			return $value === $answer->$getter();
102			});
103			}
104
105			private function mapRecordData(array $records)
106			{
107			return array_map(function ($record) {
108			return $record->getData();
109			}, $records);
110			}
111			}
112

ThrusterIO / dns

Issues (9)

Security Analysis no request data

src/Resolver.php (3 issues)

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