VULNERABILITY INTELLIGENCE
CVE-2009-2521
CVSS score5 MEDIUM
EPSS probability82.27%
CISA KEVNot currently listed
Published2009-09-04
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:N/I:N/A:P
Description
Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to cause a denial of service (daemon crash) via a list (ls) -R command containing a wildcard that references a subdirectory, followed by a .. (dot dot), aka "IIS FTP Service DoS Vulnerability."
Weakness classification
- CWE-400: Uncontrolled Resource Consumption
Primary references
- secure@microsoft.com — Broken Link
- secure@microsoft.com
- secure@microsoft.com — Third Party Advisory, US Government Resource
- secure@microsoft.com — Patch, Vendor Advisory
- secure@microsoft.com — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Broken Link
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory