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Q311967: Security Update

Posted: April 04, 2002
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Read Me First

This update resolves the "Unchecked buffer in the Multiple UNC Provider" security vulnerability in Windows 2000, and is discussed in Microsoft Security Bulletin MS02-017. Download now to prevent a malicious user from exploiting a buffer overflow vulnerability to either cause your computer to restart or to run unauthorized programs on your computer.

The vulnerability results because of a flaw in the Multiple UNC (uniform naming convention) Provider (MUP), which is a network file system resource locator that runs in kernel-mode memory in Windows. Due to an unchecked buffer (a temporary storage area of limited capacity), a malicious user can send a specially malformed request, and either cause the computer to restart or run programs as if he or she were the user.

For more information about this vulnerability, read Microsoft Security Bulletin MS02-017.

System Requirements
This update applies to Windows 2000.

How to download and install

  1. Select your language from the drop-down list at the top of the page.
  2. Click Go.
  3. Click the link under Download.
  4. Do one of the following:
    • To start the installation immediately, click Open or Run this program from its current location.
    • To copy the download to your computer for installation at a later time, click Save or Save this program to disk.
  5. Click OK.

How to use
Restart your computer to complete the installation.

How to uninstall

  1. Click Start, point to Settings, and then click Control Panel.
  2. Click Add/Remove Programs.
  3. Select Windows 2000 Hotfix (Pre-SP3) [See Q311889 for more information], and then click Change/Remove.

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