Executive Summary

Title Vulnerability in Internet Information Services Could Allow Elevation of Privilege
Name KB971492 First vendor Publication 2009-05-18
Vendor Microsoft Last vendor Modification 2009-06-09
Severity (Vendor) N/A Revision 2.0

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:H/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.6 Attack Range Network
Cvss Impact Score 10 Attack Complexity High
Cvss Expoit Score 4.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


Microsoft has completed the investigation into a public report of this vulnerability. We have issued MS09-020 to address this issue. For more information about this issue, including download links for an available security update, please review MS09-020. The vulnerability addressed is the IIS 5.1 and 6.0 WebDAV Authentication Bypass Vulnerability - CVE-2009-1535.

Original Source

Url : http://www.microsoft.com/technet/security/advisory/971492.mspx

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-287 Improper Authentication

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:6029
Oval ID: oval:org.mitre.oval:def:6029
Title: IIS 5.1 and 6.0 WebDAV Authentication Bypass Vulnerability
Description: 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.
Family: windows Class: vulnerability
Reference(s): CVE-2009-1535
Version: 1
Platform(s): Microsoft Windows XP
Microsoft Windows Server 2003
Product(s): Microsoft Internet Information Server 5.1
Microsoft Internet Information Server 6.0
Definition Synopsis:

CPE : Common Platform Enumeration

Application 2

OpenVAS Exploits

Date Description
2009-06-10 Name : Microsoft IIS Security Bypass Vulnerability (970483)
File : nvt/secpod_ms09-020.nasl
2009-05-20 Name : Microsoft IIS WebDAV Remote Authentication Bypass Vulnerability
File : nvt/secpod_ms_iis_webdav_auth_bypass_vuln.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
54555 Microsoft IIS WebDAV Unicode URI Request Authentication Bypass

Snort® IPS/IDS

Date Description
2019-01-15 (http_inspect)unicodemapcodepointencodinginURI
RuleID : 7 - Revision : 2 - Type :
2014-01-10 WebDAV Request Directory Security Bypass attempt
RuleID : 17564 - Revision : 7 - Type : SERVER-IIS

Nessus® Vulnerability Scanner

Date Description
2009-06-10 Name : It is possible to bypass authentication on the remote web server.
File : smb_nt_ms09-020.nasl - Type : ACT_GATHER_INFO
2009-05-18 Name : It is possible to access protected resources through WebDAV.
File : webdav_iis6_flaw.nasl - Type : ACT_ATTACK

Alert History

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Date Informations
2014-02-17 11:38:47
  • Multiple Updates