Issues in mod_unicode.php (master) - Issues in master - Ariadne-CMS/ariadne - Measure and Improve Code Quality continuously with Scrutinizer

Issues (1751)

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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.

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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.

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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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Response Splitting can be used to send arbitrary responses.

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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.

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

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

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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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lib/modules/mod_unicode.php (2 issues)

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Bug 2

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Major 2

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<?php
	/* code by lars(at)ioflux.net, reproduced from www.php.net */
	/* todo: add a list of common unicode characters (&euro, etc.) */

	class unicode {

		function utf8convert($string, $maxchar=0x7F, $entities=true) {

			$returns = "";
			$UTF8len = array(	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
								1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0,
								0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 2,
								2, 2, 3, 3, 3, 3, 4, 4, 5, 6);
			$pos = 0;
			$total = strlen($string);

			do {
				$c = ord($string[$pos]);
				$len = $UTF8len[($c >> 2) & 0x3F];
				switch ($len)
				{
					case 6:
						$u = $c & 0x01;
						break;
					case 5:
						$u = $c & 0x03;
						break;
					case 4:
						$u = $c & 0x07;
						break;
					case 3:
						$u = $c & 0x0F;
						break;
					case 2:
						$u = $c & 0x1F;
						break;
					case 1:
						$u = $c & 0x7F;
						break;
					case 0:	/* unexpected start of a new character */
						$u = $c & 0x3F;
						$len = 5;
						break;
				}
				while (--$len && (++$pos < $total && $c = ord($string[$pos]))) {
					if (($c & 0xC0) == 0x80) {
						$u = ($u << 6) | ($c & 0x3F);
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

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

    // $x is potentially undefined here.
    echo $x;
}
					} else {
						/* unexpected start of a new character */
						$pos--;
						break;
					}
				}
				if ($u <= $maxchar) {
					$returns .= chr($u);
				} else if ($entities) {
					$returns .= '&#'.$u.';';
				} else {
					$returns .= '?';
				}
			} while (++$pos < $total);
			return $returns;
		}

		function utf8toiso8859($string, $entities=true) {
			return unicode::utf8convert($string, 0xFF, $entities);
		}


		function convertToUTF8($charset, $string) {
		global $charset_table;
			if (!$charset_table[$charset]) {
				$tablename = preg_replace('/[^a-z0-9_-]*/', '', strtolower($charset));
				include("mod_unicode.$tablename.php");
				$charset_table[$charset] = $table;

			}
			if (is_string($string)) {
				$result = "";
				$strlen = strlen($string);
				for ($i=0; $i<$strlen; $i++) {
					$result .= $charset_table[$charset][ord($string[$i])];
				}
			} else {
				$result = $string;
			}
			return $result;
		}
	}

	class pinp_unicode extends unicode {

		function _utf8convert($string, $maxchar=0x7F, $entities=true) {
			return pinp_unicode::utf8convert($string, $maxchar, $entities);
		}

		function _utf8toiso8859($string, $entities=true) {
			return pinp_unicode::utf8toiso8859($string, $entities);
		}

		function _convertToUTF8($charset, $string) {
			return pinp_unicode::convertToUTF8($charset, $string);
		}

	}


1			<?php
2			/* code by lars(at)ioflux.net, reproduced from www.php.net */
3			/* todo: add a list of common unicode characters (&euro, etc.) */
4
5			class unicode {
6
7			function utf8convert($string, $maxchar=0x7F, $entities=true) {
8
9			$returns = "";
10			$UTF8len = array( 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
11			1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0,
12			0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 2,
13			2, 2, 3, 3, 3, 3, 4, 4, 5, 6);
14			$pos = 0;
15			$total = strlen($string);
16
17			do {
18			$c = ord($string[$pos]);
19			$len = $UTF8len[($c >> 2) & 0x3F];
20			switch ($len)
21			{
22			case 6:
23			$u = $c & 0x01;
24			break;
25			case 5:
26			$u = $c & 0x03;
27			break;
28			case 4:
29			$u = $c & 0x07;
30			break;
31			case 3:
32			$u = $c & 0x0F;
33			break;
34			case 2:
35			$u = $c & 0x1F;
36			break;
37			case 1:
38			$u = $c & 0x7F;
39			break;
40			case 0: /* unexpected start of a new character */
41			$u = $c & 0x3F;
42			$len = 5;
43			break;
44			}
45			while (--$len && (++$pos < $total && $c = ord($string[$pos]))) {
46			if (($c & 0xC0) == 0x80) {
47			$u = ($u << 6) \| ($c & 0x3F);
			0 ignored issues – show Bug introduced 2015-11-26 08:52 UTC by Report Bug Copy Issue Report Show Similar Issues like this The variable `$u` 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...
48			} else {
49			/* unexpected start of a new character */
50			$pos--;
51			break;
52			}
53			}
54			if ($u <= $maxchar) {
55			$returns .= chr($u);
56			} else if ($entities) {
57			$returns .= '&#'.$u.';';
58			} else {
59			$returns .= '?';
60			}
61			} while (++$pos < $total);
62			return $returns;
63			}
64
65			function utf8toiso8859($string, $entities=true) {
66			return unicode::utf8convert($string, 0xFF, $entities);
67			}
68
69
70			function convertToUTF8($charset, $string) {
71			global $charset_table;
72			if (!$charset_table[$charset]) {
73			$tablename = preg_replace('/[^a-z0-9_-]*/', '', strtolower($charset));
74			include("mod_unicode.$tablename.php");
75			$charset_table[$charset] = $table;
			0 ignored issues – show Bug introduced 2015-11-26 08:52 UTC by Report Bug Copy Issue Report Show Similar Issues like this The variable `$table` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
76			}
77			if (is_string($string)) {
78			$result = "";
79			$strlen = strlen($string);
80			for ($i=0; $i<$strlen; $i++) {
81			$result .= $charset_table[$charset][ord($string[$i])];
82			}
83			} else {
84			$result = $string;
85			}
86			return $result;
87			}
88			}
89
90			class pinp_unicode extends unicode {
91
92			function _utf8convert($string, $maxchar=0x7F, $entities=true) {
93			return pinp_unicode::utf8convert($string, $maxchar, $entities);
94			}
95
96			function _utf8toiso8859($string, $entities=true) {
97			return pinp_unicode::utf8toiso8859($string, $entities);
98			}
99
100			function _convertToUTF8($charset, $string) {
101			return pinp_unicode::convertToUTF8($charset, $string);
102			}
103
104			}
105

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Issues (1751)

Security Analysis not enabled

lib/modules/mod_unicode.php (2 issues)

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