Oracle MySQL 'ALTER DATABASE' Remote Denial Of Service Vulnerability

Credit: Shane Bester
Risk: Low
Local: No
Remote: Yes

CVSS Base Score: 3.5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 6.8/10
Exploit range: Remote
Attack complexity: Medium
Authentication: Single time
Confidentiality impact: None
Integrity impact: None
Availability impact: Partial

A vulnerability was reported in MySQL. A remote authenticated user can cause denial of service conditions. This issue affects versions prior to MySQL 5.1.48. A remote authenticated user can send a specially crafted ALTER DATABASE command to cause the target server to move a data directory into a new subdirectory, causing the data directory to become unusable. A demonstration exploit request is provided [where "<special>" is "." or ".." or is a sequence that begins with "./" or "../"]: ALTER DATABASE `#mysql50#<special>` UPGRADE DATA DIRECTORY NAME Vendor advisory at:


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