search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Microsoft Windows 2000/Internet Information Server (IIS) 5.0 Internet Printing Protocol (IPP) ISAPI contains buffer overflow (MS01-023)

Vulnerability Note VU#516648

Original Release Date: 2001-05-02 | Last Revised: 2001-06-26


A vulnerability exists in Microsoft IIS 5.0 running on Windows 2000 that allows a remote intruder to run arbitrary code on the victim machine.


Windows 2000 includes support for the Internet Printing Protocol (IPP) via an ISAPI extension. According to Microsoft, this extension is installed by default on all Windows 2000 systems, but is only accesible through IIS 5.0. The IPP ISAPI extension contains a buffer overflow that could be used by an attacker to execute arbitrary code in the Local System security context, essentially giving the attacker compete control of the system. For more information, see MS01-023 and the eEye Digital Security bulletin.


Remote intruders can execute arbitrary code in the Local System security context.


Install the patch as described in

One workaround is to remove the ISAPI Internet Printing extension by following these steps:

    1. Open Internet Services Manager
    2. Right-click the web server and Select "Properties" from the Context menu
    3. Select "Master Properties"
    4. In the WWW service->Edit->HomeDirectory menu, Select "Configuration"
    5. Delete the entry for ".printer"

    Vendor Information

    CVSS Metrics

    Group Score Vector



    This document was written by Shawn V Hernan.

    Other Information

    CVE IDs: CVE-2001-0241
    CERT Advisory: CA-2001-10
    Severity Metric: 54.00
    Date Public: 2001-05-01
    Date First Published: 2001-05-02
    Date Last Updated: 2001-06-26 03:04 UTC
    Document Revision: 15

    Sponsored by CISA.