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Gentoo Linux Security Advisory                           GLSA 200410-22
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                                            http://security.gentoo.org/
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  Severity: High
     Title: MySQL: Multiple vulnerabilities
      Date: October 24, 2004
      Bugs: #67062
        ID: 200410-22

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Synopsis
========

Several vulnerabilities including privilege abuse, Denial of Service,
and potentially remote arbitrary code execution have been discovered
in MySQL.

Background
==========

MySQL is a popular open-source, multi-threaded, multi-user SQL database
server.

Affected packages
=================

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  dev-db/mysql      < 4.0.21                              >= 4.0.21

Description
===========

The following vulnerabilities were found and fixed in MySQL:

Oleksandr Byelkin found that ALTER TABLE ... RENAME checks
CREATE/INSERT rights of the old table instead of the new one
(CAN-2004-0835). Another privilege checking bug allowed users to grant
rights on a database they had no rights on.

Dean Ellis found a defect where multiple threads ALTERing the MERGE
tables to change the UNION could cause the server to crash
(CAN-2004-0837). Another crash was found in MATCH ... AGAINST() queries
with missing closing double quote.

Finally, a buffer overrun in the mysql_real_connect function was found
by Lukasz Wojtow (CAN-2004-0836).

Impact
======

The privilege checking issues could be used by remote users to bypass
their rights on databases. The two crashes issues could be exploited by
a remote user to perform a Denial of Service attack on MySQL server.
The buffer overrun issue could also be exploited as a Denial of Service
attack, and may allow to execute arbitrary code with the rights of the
MySQL daemon (typically, the "mysql" user).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MySQL users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=dev-db/mysql-4.0.21"
    # emerge ">=dev-db/mysql-4.0.21"

References
==========

  [ 1 ] CAN-2004-0835
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0835
  [ 2 ] CAN-2004-0836
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0836
  [ 3 ] CAN-2004-0837
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0837
  [ 4 ] Privilege granting bug
        http://bugs.mysql.com/bug.php?id=3933
  [ 5 ] MATCH ... AGAINST crash bug
        http://bugs.mysql.com/bug.php?id=3870

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200410-22.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/1.0