Executive Summary

Summary
Title Vulnerabilities in Internet Information Services (IIS) Could Allow Elevation of Privilege (970483)
Informations
Name MS09-020 First vendor Publication 2009-06-09
Vendor Microsoft Last vendor Modification 2009-06-17
Severity (Vendor) Important Revision 1.1

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

Detail

Revision Note: V1.1 (June 17, 2009): Expanded on the "What causes the vulnerability?" FAQ entries for CVE-2009-1122 and CVE-2009-1535. This is an informational change only.Summary: This security update resolves one publicly disclosed vulnerability and one privately reported vulnerability in Microsoft Internet Information Services (IIS). The vulnerabilities could allow elevation of privilege if an attacker sent a specially crafted HTTP request to a Web site that requires authentication. These vulnerabilities allow an attacker to bypass the IIS configuration that specifies which type of authentication is allowed, but not the file system-based access control list (ACL) check that verifies whether a file is accessible by a given user. Successful exploitation of these vulnerabilities would still restrict the attacker to the permissions granted to the anonymous user account by the file system ACLs.

Original Source

Url : http://www.microsoft.com/technet/security/bulletin/MS09-020.mspx

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-287 Improper Authentication

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:5861
 
Oval ID: oval:org.mitre.oval:def:5861
Title: IIS 5.0 WebDAV Authentication Bypass Vulnerability
Description: The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4 does not properly decode URLs, which allows remote attackers to bypass authentication, and possibly read or create files, via a crafted HTTP request, aka "IIS 5.0 WebDAV Authentication Bypass Vulnerability," a different vulnerability than CVE-2009-1535.
Family: windows Class: vulnerability
Reference(s): CVE-2009-1122
Version: 1
Platform(s): Microsoft Windows 2000
Product(s): Microsoft Internet Information Server 5.0
Definition Synopsis:
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

TypeDescriptionCount
Application 3

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
56474 Microsoft IIS WebDAV Extension URL Decode Crafted HTTP Request Authentication...

54555 Microsoft IIS WebDAV Unicode URI Request Authentication Bypass

Information Assurance Vulnerability Management (IAVM)

Date Description
2009-06-11 IAVM : 2009-B-0022 - Multiple vulnerabilities in Microsoft Internet Information Services (IIS)
Severity : Category II - VMSKEY : V0019400

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
2014-01-10 VideoLAN VLC Media Player MP4_BoxDumpStructure Buffer Overflow
RuleID : 17527 - Revision : 11 - Type : FILE-MULTIMEDIA
2014-01-10 Microsoft Windows IIS 5.0 WebDav Request Directory Security Bypass
RuleID : 17525 - Revision : 9 - Type : SERVER-IIS

Metasploit Database

id Description
2020-05-23 MS09-020 IIS6 WebDAV Unicode Authentication Bypass
2020-05-23 MS09-020 IIS6 WebDAV Unicode Auth Bypass Directory Scanner

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
2020-05-23 13:17:13
  • Multiple Updates
2015-01-14 13:23:36
  • Multiple Updates
2014-02-17 11:46:14
  • Multiple Updates
2013-11-11 12:41:11
  • Multiple Updates