CVE-2009-1535

The WebDAV extension in Microsoft Internet Information Services (IIS) 5.1 and 6.0 allows remote attackers to bypass URI-based protection mechanisms, and list folders or read, create, or modify files, via a %c0%af (Unicode / character) at an arbitrary position in the URI, as demonstrated by inserting %c0%af into a "/protected/" initial pathname component to bypass the password protection on the protected\ folder, aka "IIS 5.1 and 6.0 WebDAV Authentication Bypass Vulnerability," a different vulnerability than CVE-2009-1122.

• CWE-287

• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0135.htmlBroken Link
• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0139.htmlBroken Link
• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0144.htmlBroken Link
• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/att-0135/IIS_Advisory.pdfBroken Link
• http://blog.zoller.lu/2009/05/iis-6-webdac-auth-bypass-and-data.htmlThird Party Advisory
• http://isc.sans.org/diary.html?n&storyid=6397Third Party Advisory
• http://view.samurajdata.se/psview.php?id=023287d6&page=1Broken Link
• http://www.attrition.org/pipermail/vim/2009-June/002192.htmlThird Party Advisory
• http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlThird Party Advisory, US Government Resource
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020Patch, Vendor Advisory
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6029Third Party Advisory
• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0135.htmlBroken Link
• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0139.htmlBroken Link
• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0144.htmlBroken Link
• http://archives.neohapsis.com/archives/fulldisclosure/2009-05/att-0135/IIS_Advisory.pdfBroken Link
• http://blog.zoller.lu/2009/05/iis-6-webdac-auth-bypass-and-data.htmlThird Party Advisory
• http://isc.sans.org/diary.html?n&storyid=6397Third Party Advisory
• http://view.samurajdata.se/psview.php?id=023287d6&page=1Broken Link
• http://www.attrition.org/pipermail/vim/2009-June/002192.htmlThird Party Advisory
• http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlThird Party Advisory, US Government Resource
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020Patch, Vendor Advisory
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6029Third Party Advisory

Published

Jun 10, 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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