CVE-2009-2521

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."

• CWE-400

• http://archives.neohapsis.com/archives/fulldisclosure/2009-09/0040.htmlBroken Link
• http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ975191
• http://www.us-cert.gov/cas/techalerts/TA09-286A.htmlThird Party Advisory, US Government Resource
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-053Patch, Vendor Advisory
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6508Third Party Advisory
• http://archives.neohapsis.com/archives/fulldisclosure/2009-09/0040.htmlBroken Link
• http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ975191
• http://www.us-cert.gov/cas/techalerts/TA09-286A.htmlThird Party Advisory, US Government Resource
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-053Patch, Vendor Advisory
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6508Third Party Advisory

Published

Sep 4, 2009

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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