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Last updated: 6/3/2015 1:48:06 PM

CVE Publication rate: 14.73

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Vulnerability Summary for CVE-2009-1535

Original release date: 06/10/2009
Last revised: 08/21/2010


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.6 (HIGH) (AV:N/AC:H/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 4.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: MISC
Name: http://isc.sans.org/diary.html?n&storyid=6397
External Source: FULLDISC
Name: 20090515 Re: IIS6 + webdav and unicode rides again in 2009
US-CERT Vulnerability Note: CERT
Name: TA09-160A
External Source: VIM
Name: 20090616 IIS WebDav Vulnerability CVE ID
External Source: MISC
Name: http://blog.zoller.lu/2009/05/iis-6-webdac-auth-bypass-and-data.html
External Source: FULLDISC
Name: 20090515 IIS6 + webdav and unicode rides again in 2009
External Source: MISC
Name: http://view.samurajdata.se/psview.php?id=023287d6&page=1
External Source: OVAL
Name: oval:org.mitre.oval:def:6029
External Source: MS
Name: MS09-020
External Source: MISC
Name: http://archives.neohapsis.com/archives/fulldisclosure/2009-05/att-0135/IIS_Advisory.pdf
External Source: FULLDISC
Name: 20090515 Re: IIS6 + webdav and unicode rides again in 2009

References to Check Content

Identifier: oval:org.mitre.oval:def:6029
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:microsoft:iis:6.0
* cpe:/a:microsoft:iis:5.1
* cpe:/a:microsoft:iis:5.0

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)