Used Microsoft Windows XP Home Edition Malformed Data Transfer Request can Cause Windows SMTP Service to Fail for Windows?


Editors’ Review

Download.com staff
This security patch addresses a critical flaw in Microsoft's SMTP service across Windows 2000 and XP. It prevents denial of service attacks by correctly handling malformed SMTP commands.
  • Pros

    • Patch prevents denial of service attacks on SMTP service.
    • Patch ensures proper handling of SMTP commands for mail transfer.
    • Patch secures default SMTP service on Windows 2000 server.
    • Patch protects Exchange 2000's integrated SMTP service.
    • Patch addresses workstation SMTP service on Windows 2000/XP.
  • Cons

    • Unpatched SMTP service vulnerable to denial of service attacks.
    • Malformed SMTP commands could cause service to fail.
    • Service failure disrupted incoming mail functionality.
    • Default SMTP service on Windows 2000 server contained flaw.
    • Exchange 2000's native SMTP service was susceptible.

Used Microsoft Windows XP Home Edition Malformed Data Transfer Request can Cause Windows SMTP Service to Fail for Windows?


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Full Specifications

GENERAL
Release
Latest update
Version
Q313450
OPERATING SYSTEMS
Platform
Windows
Operating System
  • Windows 10
  • Windows XP
Additional Requirements
Microsoft Windows XP Home Edition
POPULARITY
Total Downloads
1,469
Downloads Last Week
0

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Developer’s Description

Security patch
An SMTP service installs by default as part of Windows 2000 server products. Exchange 2000, which can only be installed on Windows 2000, uses the native Windows 2000 SMTP service rather than providing its own. In addition, Windows 2000 and Windows XP workstation products provide an SMTP service that is not installed by default. All of these implementations contain a flaw that could enable denial of service attacks to be mounted against the service.

The flaw involves how the service handles a particular type of SMTP command used to transfer the data that constitutes an incoming mail. By sending a malformed version of this command, an attacker could cause the SMTP service to fail. This would have the effect of disrupting mail services on the affected system, but would not cause the operating system itself to fail.


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