MySQL MERGE Table Privilege Revoke Bypass - Advisories

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MySQL MERGE Table Privilege Revoke Bypass

Secunia Advisory:	SA21259
Release Date:	2006-08-01
Last Update:	2007-07-20

Critical:	Not critical
Impact:	Security Bypass
Where:	From local network
Solution Status:	Vendor Patch

Software:	MySQL 3.x MySQL 4.x MySQL 5.x

CVE reference:	CVE-2006-4031 (Secunia mirror)

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Description: Peter Gulutzan has reported a vulnerability in MySQL, which can be exploited by malicious users to bypass certain security restrictions. The vulnerability is caused due to a design error in the user privilege verification for MERGE tables. This can be exploited to keep access to a table via an in advance created MERGE table even after the privileges has been revoked for the table. Solution: MySQL 4.1.x: Update to version 4.1.21. MySQL 5.x: Update to version 5.0.24 or later. NOTE: The vulnerability has been fixed by introducing the "--skip-merge" command line option which disables the MERGE storage engine. Provided and/or discovered by: Peter Gulutzan Changelog: 2006-08-10: Added CVE reference. 2007-07-20: Updated "Solution" section. Original Advisory: MySQL: http://dev.mysql.com/doc/refman/4.1/en/news-4-1-21.html http://dev.mysql.com/doc/refman/5.0/en/news-5-0-24.html



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise. Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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