CVE-2009-2521
First published: Fri Sep 04 2009(Updated: )
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."
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Internet Information Services (IIS) | >=5.0<=7.0 |
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Reference Links
- http://archives.neohapsis.com/archives/fulldisclosure/2009-09/0040.html
- http://www.us-cert.gov/cas/techalerts/TA09-286A.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6508
- http://support.microsoft.com/default.aspx?scid=kb;[LN];Q975191
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-053
- http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ975191
Frequently Asked Questions
What is the severity of CVE-2009-2521?
CVE-2009-2521 is classified as a denial of service vulnerability.
How do I fix CVE-2009-2521?
To fix CVE-2009-2521, ensure that your Microsoft Internet Information Services (IIS) is updated to a version that has patched this vulnerability.
Who is affected by CVE-2009-2521?
CVE-2009-2521 affects remote authenticated users of Microsoft Internet Information Services versions 5.0 through 7.0.
What kind of attacks can exploit CVE-2009-2521?
CVE-2009-2521 can be exploited through specially crafted FTP list commands that cause stack consumption and lead to a service crash.
When was CVE-2009-2521 reported?
CVE-2009-2521 was reported in September 2009.
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