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Re: [oss-security] Re: [Full-disclosure] MySQL (Linux) Stack based buffer overrun PoC Zeroday
From: Sergei Golubchik <serg () askmonty org>
Date: Mon, 3 Dec 2012 08:51:35 +0100

Hi, king cope!

On Dec 02, king cope wrote:
Hi,
My opinion is that the FILE to admin privilege elevation should be
patched.  What is the reason to have FILE and ADMIN privileges
seperated when with this exploit FILE privileges equate to ALL ADMIN
privileges.
I understand that it's insecure to have FILE privileges attached to a
user.  But if this a configuration issue and not a vulnerability then
as stated above there must be something wrong with the privilege
management in this SQL server.

You've missed that part of my reply:

Additionally, MySQL (and MariaDB) provides a --secure-file-priv
option that allows to restrict all FILE operations to a specific
directory.

Normally, if a DBA wants to grant FILE privilege to users, the server
will have something like secure-file-priv=/tmp/mysql (for example)
specified in the configuration file. This way any operation allowed by
the FILE privilege (like SELECT ... OUTFILE) will only be able to access
files under the /tmp/mysql/ path.

Regards,
Sergei


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