Microsoft Security Bulletin MS03-005: Unchecked Buffer in Windows Redirector Could Allow Privilege Elevation (810577)

2003-02-07T00:00:00
ID SECURITYVULNS:DOC:4051
Type securityvulns
Reporter Securityvulns
Modified 2003-02-07T00:00:00

Description

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Title: Unchecked Buffer in Windows Redirector Could Allow Privilege Elevation (810577) Date: 05 February 2003 Software: Microsoft Windows XP Impact: Privilege elevation Max Risk: Important Bulletin: MS03-005

Microsoft encourages customers to review the Security Bulletins at: http://www.microsoft.com/technet/security/bulletin/ms03-005.asp http://www.microsoft.com/security/security_bulletins/ms03-005.asp


Issue:

The Windows Redirector is used by a Windows client to access files, whether local or remote, regardless of the underlying network protocols in use. For example, the "Add a Network Place" Wizard or the NET USE command can be used to map a network share as a local drive, and the Windows Redirector will handle the routing of information to and from the network share.

A security vulnerability exists in the implementation of the Windows Redirector on Windows XP because an unchecked buffer is used to receive parameter information. By providing malformed data to the Windows Redirector, an attacker could cause the system to fail, or if the data was crafted in a particular way, could run code of the attacker's choice.

Mitigating Factors:

  • An attacker would require the ability to log onto the system interactively in order to run programs that use the Windows Redirector. This vulnerability cannot be exploited remotely.
  • Windows XP systems that are not shared between users would not be at risk.

Risk Rating:

  • Windows XP: Important

Patch Availability:

  • A patch is available to fix this vulnerability. Please read the Security Bulletins at

http://www.microsoft.com/technet/security/bulletin/ms03-005.asp http://www.microsoft.com/security/security_bulletins/ms03-005.asp

for information on obtaining this patch.

Acknowledgment:

  • NSFocus (http://www.nsfocus.com)

Home User Security Notification Service

Microsoft is now offering the Microsoft Security Update, a security bulletin notification service for home users. To learn more about this service, please go to:

http://www.microsoft.com/security/security_bulletins/decision.asp


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