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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
<?php
/**
*
* @package phpBB3
* @copyright (c) 2009, 2010 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
/**
* This script will check your database for potentially dangerous flash BBCode tags
*/
//
// Security message:
//
// This script is potentially dangerous.
// Remove or comment the next line (die(".... ) to enable this script.
// Do NOT FORGET to either remove this script or disable it after you have used it.
//
die("Please read the first lines of this script for instructions on how to enable it\n");
/**
*/
define('IN_PHPBB', true);
$phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($phpbb_root_path . 'common.' . $phpEx);
if (php_sapi_name() != 'cli')
{
header('Content-Type: text/plain');
}
check_table_flash_bbcodes(POSTS_TABLE, 'post_id', 'post_text', 'bbcode_uid', 'bbcode_bitfield');
check_table_flash_bbcodes(PRIVMSGS_TABLE, 'msg_id', 'message_text', 'bbcode_uid', 'bbcode_bitfield');
check_table_flash_bbcodes(USERS_TABLE, 'user_id', 'user_sig', 'user_sig_bbcode_uid', 'user_sig_bbcode_bitfield');
check_table_flash_bbcodes(FORUMS_TABLE, 'forum_id', 'forum_desc', 'forum_desc_uid', 'forum_desc_bitfield');
check_table_flash_bbcodes(FORUMS_TABLE, 'forum_id', 'forum_rules', 'forum_rules_uid', 'forum_rules_bitfield');
check_table_flash_bbcodes(GROUPS_TABLE, 'group_id', 'group_desc', 'group_desc_uid', 'group_desc_bitfield');
echo "If potentially dangerous flash bbcodes were found, please reparse the posts using the Support Toolkit (http://www.phpbb.com/support/stk/) and/or file a ticket in the Incident Tracker (http://www.phpbb.com/incidents/).\n";
function check_table_flash_bbcodes($table_name, $id_field, $content_field, $uid_field, $bitfield_field)
{
echo "Checking $content_field on $table_name\n";
$ids = get_table_flash_bbcode_pkids($table_name, $id_field, $content_field, $uid_field, $bitfield_field);
$size = sizeof($ids);
if ($size)
{
echo "Found $size potentially dangerous flash bbcodes.\n";
echo "$id_field: " . implode(', ', $ids) . "\n";
}
else
{
echo "No potentially dangerous flash bbcodes found.\n";
}
echo "\n";
}
function get_table_flash_bbcode_pkids($table_name, $id_field, $content_field, $uid_field, $bitfield_field)
{
global $db;
$ids = array();
$sql = "SELECT $id_field, $content_field, $uid_field, $bitfield_field
FROM $table_name
WHERE $content_field LIKE '%[/flash:%'
AND $bitfield_field <> ''";
$result = $db->sql_query($sql);
while ($row = $db->sql_fetchrow($result))
{
$uid = $row[$uid_field];
// thanks support toolkit
$content = html_entity_decode_utf8($row[$content_field]);
set_var($content, $content, 'string', true);
$content = utf8_normalize_nfc($content);
$bitfield_data = $row[$bitfield_field];
if (!is_valid_flash_bbcode($content, $uid) && has_flash_enabled($bitfield_data))
{
$ids[] = (int) $row[$id_field];
}
}
$db->sql_freeresult($result);
return $ids;
}
function get_flash_regex($uid)
{
return "#\[flash=([0-9]+),([0-9]+):$uid\](.*?)\[/flash:$uid\]#";
}
// extract all valid flash bbcodes
// check if the bbcode content is a valid URL for each match
function is_valid_flash_bbcode($cleaned_content, $uid)
{
$regex = get_flash_regex($uid);
$url_regex = get_preg_expression('url');
$www_url_regex = get_preg_expression('www_url');
if (preg_match_all($regex, $cleaned_content, $matches))
{
foreach ($matches[3] as $flash_url)
{
if (!preg_match("#^($url_regex|$www_url_regex)$#i", $flash_url))
{
return false;
}
}
}
return true;
}
// check if a bitfield includes flash
// 11 = flash bit
function has_flash_enabled($bitfield_data)
{
$bitfield = new bitfield($bitfield_data);
return $bitfield->get(11);
}
// taken from support toolkit
function html_entity_decode_utf8($string)
{
static $trans_tbl;
// replace numeric entities
$string = preg_replace('~&#x([0-9a-f]+);~ei', 'code2utf8(hexdec("\\1"))', $string);
$string = preg_replace('~&#([0-9]+);~e', 'code2utf8(\\1)', $string);
// replace literal entities
if (!isset($trans_tbl))
{
$trans_tbl = array();
foreach (get_html_translation_table(HTML_ENTITIES) as $val=>$key)
$trans_tbl[$key] = utf8_encode($val);
}
return strtr($string, $trans_tbl);
}
// taken from support toolkit
// Returns the utf string corresponding to the unicode value (from php.net, courtesy - romans@void.lv)
function code2utf8($num)
{
if ($num < 128) return chr($num);
if ($num < 2048) return chr(($num >> 6) + 192) . chr(($num & 63) + 128);
if ($num < 65536) return chr(($num >> 12) + 224) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
if ($num < 2097152) return chr(($num >> 18) + 240) . chr((($num >> 12) & 63) + 128) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
return '';
}
|
