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Category:   Application (Database)  >   MySQL Vendors:   MySQL.com, Oracle
MySQL memcmp() Comparison Error Lets Remote Users Bypass Authentication
SecurityTracker Alert ID:  1027143
SecurityTracker URL:  http://securitytracker.com/id/1027143
CVE Reference:   CVE-2012-2122   (Links to External Site)
Date:  Jun 12 2012
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.1.61, 5.2.11, 5.3.5, 5.5.22 and prior versions
Description:   A vulnerability was reported in MySQL. A remote user can bypass authentication.

A remote user can trigger a flaw in comparing authentication data to bypass authentication.

The vendor indicates that many builds are not affected.

Versions compiled with a memcmp() function that can return an arbitrary integer (outside of -128 .. 127 range) are affected.

Impact:   A remote user can access the database without authenticating.
Solution:   The vendor has issued a fix (5.1.63, 5.5.24, 5.6.6).

The vendor's advisories are available at:

http://bugs.mysql.com/bug.php?id=64884
http://dev.mysql.com/doc/refman/5.1/en/news-5-1-63.html

Vendor URL:  www.mysql.com/ (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jan 22 2013 (Red Hat Issues Fix) MySQL memcmp() Comparison Error Lets Remote Users Bypass Authentication
Red Hat has issued a fix for Red Hat Enterprise Linux 5.



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