1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
--TEST--
Disable XXE
--SKIPIF--
<?php
if (!extension_loaded("snuffleupagus")) {
echo "skip";
} elseif (!extension_loaded("dom")) {
echo "skip";
}
?>
--INI--
sp.configuration_file={PWD}/config/disable_xxe.ini
--FILE--
<?php
$dir = __DIR__;
$content = 'WARNING, external entity loaded!';
file_put_contents('content.txt', $content);
$xml = <<<EOD
<?xml version="1.0"?>
<!DOCTYPE root
[
<!ENTITY foo SYSTEM "file://$dir/content.txt">
]>
<test><testing>&foo;</testing></test>
EOD;
file_put_contents('content.xml', $xml);
libxml_disable_entity_loader(true);
$dom = new DOMDocument('1.0');
$dom->loadXML($xml, LIBXML_DTDATTR|LIBXML_DTDLOAD|LIBXML_NOENT);
printf("libxml_disable_entity to true: %s\n", $dom->getElementsByTagName('testing')->item(0)->nodeValue);
libxml_disable_entity_loader(false);
$dom = new DOMDocument('1.0');
$dom->loadXML($xml, LIBXML_DTDATTR|LIBXML_DTDLOAD|LIBXML_NOENT);
printf("libxml_disable_entity to false: %s\n", $dom->getElementsByTagName('testing')->item(0)->nodeValue);
$xml = "<test><testing>foo</testing></test>";
file_put_contents('content.xml', $xml);
libxml_disable_entity_loader(false);
$dom = new DOMDocument('1.0');
$dom->loadXML($xml, LIBXML_DTDATTR|LIBXML_DTDLOAD|LIBXML_NOENT);
printf("without xxe: %s", $dom->getElementsByTagName('testing')->item(0)->nodeValue);
?>
--EXPECTF--
Warning: DOMDocument::loadXML(): I/O warning : failed to load external entity "file://%a/content.txt" in %a/disable_xxe_dom.php on line %d
Warning: DOMDocument::loadXML(): Failure to process entity foo in Entity, line: %d in %a/disable_xxe_dom.php on line %d
Warning: DOMDocument::loadXML(): Entity 'foo' not defined in Entity, line: %d in %a/disable_xxe_dom.php on line %d
Notice: Trying to get property %a in %a/disable_xxe_dom.php on line %d
libxml_disable_entity to true:
Warning: DOMDocument::loadXML(): I/O warning : failed to load external entity "file://%a/content.txt" in %a/disable_xxe_dom.php on line %d
Warning: DOMDocument::loadXML(): Failure to process entity foo in Entity, line: %d in %a/disable_xxe_dom.php on line %d
Warning: DOMDocument::loadXML(): Entity 'foo' not defined in Entity, line: %d in %a/disable_xxe_dom.php on line %d
Notice: Trying to get property %a in %a/disable_xxe_dom.php on line %d
libxml_disable_entity to false:
without xxe: foo
--CLEAN--
<?php
$dir = __DIR__;
unlink($dir . "content.xml");
unlink($dir . "content.txt");
?>
|
