VULNERABILITY INTELLIGENCE
CVE-2009-4030
CVSS score4.4 MEDIUM
EPSS probability0.43%
CISA KEVNot currently listed
Published2009-11-30
Last modified2026-06-16
CVSS vectorAV:L/AC:M/Au:N/C:P/I:P/A:P
Description
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.
Weakness classification
- CWE-59: Improper Link Resolution Before File Access ('Link Following')