MySQL 5.1.x before 5.1.41 allows local users to bypass certain privilege checks by calling CREATE TABLE on a MyISAM table with modified (1) DATA DIRECTORY or (2) INDEX DIRECTORY arguments that are originally associated with pathnames without symlinks, and that can point to tables created at a future time at which a pathname is modified to contain a symlink to a subdirectory of the MySQL data home directory, related to incorrect calculation of the mysql_unpacked_real_data_home value. NOTE: this vulnerability exists because of an incomplete fix for CVE-2008-4098 and CVE-2008-2079.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8156
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11116
http://www.vupen.com/english/advisories/2010/1107
http://www.ubuntu.com/usn/USN-1397-1
http://www.redhat.com/support/errata/RHSA-2010-0110.html
http://www.redhat.com/support/errata/RHSA-2010-0109.html
http://www.openwall.com/lists/oss-security/2009/11/24/6
http://www.openwall.com/lists/oss-security/2009/11/19/3
http://www.debian.org/security/2010/dsa-1997
http://ubuntu.com/usn/usn-897-1
http://support.apple.com/kb/HT4077
http://secunia.com/advisories/38573
http://secunia.com/advisories/38517
http://marc.info/?l=oss-security&m=125908080222685&w=2
http://marc.info/?l=oss-security&m=125908040022018&w=2
http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
http://lists.mysql.com/commits/89940
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html