Bug 882600 (CVE-2012-5612)

Summary:	CVE-2012-5612 mysql: MDL subsystem heap-based buffer overflow
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	hhorak, jlieskov, redhat, roomojee, tgl
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mysql 5.5.29	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-01-18 04:53:00 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:
Bug Blocks:	882596, 895568, 895572

Description Huzaifa S. Sidhpurwala 2012-12-02 06:51:02 UTC

A heap-based buffer overflow was found in Mysql. An authenticated database user could use this flaw to cause mysqld to crash or possibly execute arbitrary code with the privileges of the user running mysql.

Reference:
http://seclists.org/fulldisclosure/2012/Dec/5

This issue was assigned CVE-2012-5612

Comment 1 Huzaifa S. Sidhpurwala 2012-12-03 04:52:19 UTC

External Reference:

https://mariadb.atlassian.net/browse/MDEV-3908

Comment 2 Jan Lieskovsky 2012-12-03 11:26:42 UTC

Some other references:
  http://www.exploit-db.com/exploits/23076
  http://www.openwall.com/lists/oss-security/2012/12/02/3
  http://www.openwall.com/lists/oss-security/2012/12/02/4

Comment 3 Huzaifa S. Sidhpurwala 2012-12-04 10:02:22 UTC

This issue only affect MySQL 5.5 and higher, since the vulnerable MDL subsystem was first implemented in MySQL 5.5:

https://mariadb.atlassian.net/browse/MDEV-3908?focusedCommentId=28712#comment-28712

Comment 5 Huzaifa S. Sidhpurwala 2012-12-04 10:14:12 UTC

Based on comment #3, this flaw does not seem to affect the version of mysql shipped with Red Hat Enterprise Linux 5 and 6, since mariadb upstream suggests that this only affects 5.5 and above.

Comment 7 Jan Lieskovsky 2013-01-16 13:38:00 UTC

Oracle January 2013 CPU record:
  http://www.oracle.com/technetwork/topics/security/cpujan2013-1515902.html

Comment 8 Huzaifa S. Sidhpurwala 2013-01-18 04:53:00 UTC

Text of the Oracle flaw description:

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server Parser). Supported versions that are affected are 5.5.28 and earlier. Easily exploitable vulnerability allows successful authenticated network attacks via multiple protocols. Successful attack of this vulnerability can result in unauthorized Operating System takeover including arbitrary code execution. 

http://www.oracle.com/technetwork/topics/security/cpujan2013verbose-1897756.html#MSQL

Upstream notes this issue only affected MySQL versions 5.5.  Red Hat Enterprise Linux 5 and 6 include MySQL versions 5.0.x and 5.1.x respectively, which are not listed as affected.  Current Fedora versions are already updated to fixed upstream version.  Closing.

Comment 9 Tomas Hoger 2013-01-21 17:43:24 UTC

Oracle MySQL upstream commits:
http://bazaar.launchpad.net/~mysql/mysql-server/5.5/revision/4036
http://bazaar.launchpad.net/~mysql/mysql-server/5.5/revision/4037

MariaDB test case:
http://bazaar.launchpad.net/~maria-captains/maria/5.5/revision/3633

Comment 10 Tomas Hoger 2013-01-22 21:04:08 UTC

The fix is also noted in 5.5.29 release notes:

  Very long table aliases in queries could cause the server to exit.
  (Bug #15948123)

http://dev.mysql.com/doc/relnotes/mysql/5.5/en/news-5-5-29.html