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MySQL MERGE Table Privilege Revoke Bypass Advisory Available in Danish  Advisory Available in German 

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 This can be exploited to keep access to a table via an in advance created MERGE table even after the privileges has been revoked for the table.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.

28 Related Secunia Security Advisories, displaying 10

1. MySQL MyISAM Table Privilege Check Bypass
2. MySQL Multiple Vulnerabilities
3. MySQL Security Issue and Two Vulnerabilities
4. MySQL System Table Information Overwrite Vulnerability
5. MySQL InnoDB Denial of Service Vulnerability
6. MySQL Denial of Service Vulnerability and Multiple Security Issues
7. MySQL IF Query Denial of Service Vulnerability
8. MySQL Single-Row Subselect and INFORMATION_SCHEMA Denial of Service
9. MySQL Create Database Bypass and Privilege Escalation
10. MySQL Multibyte Encoding SQL Injection Vulnerability

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