Bug 833737 (CVE-2012-2749)

Summary:	CVE-2012-2749 mysql: crash caused by wrong calculation of key length for sort order index
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	byte, hhorak, kvolny, tgl
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mysql 5.1.63, mysql 5.5.24	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-01-23 06:32:57 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:	871813, 871814, 892679, 892680
Bug Blocks:	832540, 833743

Description Tomas Hoger 2012-06-20 08:27:37 UTC

MySQL versions 5.1.63 and 5.5.24 fix the following bug noted in the 5.1.63 release notes:

 * Security Fix: Bug #59387 was fixed.

 http://dev.mysql.com/doc/refman/5.1/en/news-5-1-63.html

This bug is also fixed in 5.5.24, but not mentioned in the release notes or changelog.

Related upstream change is:

http://bazaar.launchpad.net/~mysql/mysql-server/5.1/revision/3560.10.16
Bug#11766300 59387: FAILING ASSERTION: CURSOR->POS_STATE == 1997660512 (BTR_PCUR_IS_POSITIONE
Bug#13639204 64111: CRASH ON SELECT SUBQUERY WITH NON UNIQUE INDEX

This issue allows non-admin database user with full SQL access to crash mysqld.  Upstream commit explains issue details:

  The crash happened due to wrong calculation of key length during
  creation of reference for sort order index. The problem is that
  keyuse->used_tables can have OUTER_REF_TABLE_BIT enabled but
  used_tables parameter(create_ref_for_key() func) does not have it.
  So key parts which have OUTER_REF_TABLE_BIT are ommited and it could
  lead to incorrect key length calculation(zero key length).

Comment 1 Tomas Hoger 2012-06-20 08:30:46 UTC

Related upstream bugs remain non-public:
  http://bugs.mysql.com/bug.php?id=59387
  http://bugs.mysql.com/bug.php?id=64111

Comment 3 errata-xmlrpc 2012-11-14 20:53:06 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:1462 https://rhn.redhat.com/errata/RHSA-2012-1462.html

Comment 7 errata-xmlrpc 2013-01-22 18:35:53 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2013:0180 https://rhn.redhat.com/errata/RHSA-2013-0180.html