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Test ID:1.3.6.1.4.1.25623.1.0.10695
Category:Web Servers
Title:IIS .IDA ISAPI filter applied
Summary:Tests for IIS .ida ISAPI filter
Description:
Synopsis :

Indexing Service filter is enabled on the remote Web server.

Description :

The IIS server appears to have the .IDA ISAPI filter mapped.

At least one remote vulnerability has been discovered for the .IDA
(indexing service) filter. This is detailed in Microsoft Advisory
MS01-033, and gives remote SYSTEM level access to the web server.

It is recommended that even if you have patched this vulnerability that
you unmap the .IDA extension, and any other unused ISAPI extensions
if they are not required for the operation of your site.

Solution :

To unmap the .IDA extension:
1.Open Internet Services Manager.
2.Right-click the Web server choose Properties from the context menu.
3.Master Properties
4.Select WWW Service -> Edit -> HomeDirectory -> Configuration
and remove the reference to .ida from the list.

In addition, you may wish to download and install URLSCAN from the
Microsoft Technet web site. URLSCAN, by default, blocks all .ida
requests to the IIS server.
Cross-Ref: BugTraq ID: 2880
Common Vulnerability Exposure (CVE) ID: CVE-2001-0500
Bugtraq: 20010618 All versions of Microsoft Internet Information Services, Remote buffer overflow (SYSTEM Level Access) (Google Search)
http://www.securityfocus.com/archive/1/191873
http://www.microsoft.com/technet/security/bulletin/MS01-033.asp
http://www.cert.org/advisories/CA-2001-13.html
http://www.securityfocus.com/bid/2880
http://www.iss.net/security_center/static/6705.php
Computer Incident Advisory Center Bulletin: L-098
http://www.ciac.org/ciac/bulletins/l-098.shtml
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:197
CopyrightThis script is Copyright (C) 2001 Matt Moore

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