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Microsoft Windows NNTP Network News Service Has a Memory Leak That Allows Remote Users to Cause the Server to Crash
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SecurityTracker Alert ID: 1002197 |
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SecurityTracker URL: http://securitytracker.com/id/1002197
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CVE Reference:
CAN-2001-0543
(Links to External Site)
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Date: Aug 15 2001
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes
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Description:
Microsoft reported a vulnerability in their Network News Transport Protocol (NNTP) service for Windows NT 4.0 and Windows 2000. The service contains a memory leak that allows a remote user to make multiple NNTP posts to cause the server to crash.
It is reported that the memory leak is in a routine that processes news postings. Each time a remote user makes a post that contains a particular construction (which is not identified by the vendor), the vulnerability is triggered and some memory becomes not available for use. If a remote user makes many posts, enough memory on the server could be depeted causing the server to crash.
The vendor reports that an affected server can be restored to normal service by rebooting.
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Impact:
A remote user can create a news post that, if many such posts are submitted, could cause the server to crash.
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Solution:
The vendor recommends that system administrators apply the patch immediately. Patch information is available at the Vendor URL.
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Vendor URL: www.microsoft.com/technet/security/bulletin/MS01-043.asp (Links to External Site)
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Cause:
Resource error
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Underlying OS:
Windows (NT), Windows (2000)
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Message History:
None.
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Source Message Contents
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Date: Tue, 14 Aug 2001 17:25:08 -0700
Subject: Microsoft Security Bulletin MS01-043
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The following is a Security Bulletin from the Microsoft Product Security
Notification Service.
Please do not reply to this message, as it was sent from an unattended
mailbox.
********************************
-----BEGIN PGP SIGNED MESSAGE-----
- ----------------------------------------------------------------------
Title: NNTP Service in Windows NT 4.0 and Windows 2000
Contains Memory Leak
Date: 14 August 2001
Software: Windows NT 4.0, Windows 2000
Impact: Denial of service
Bulletin: MS01-043
Microsoft encourages customers to review the Security Bulletin at:
http://www.microsoft.com/technet/security/bulletin/MS01-043.asp.
- ----------------------------------------------------------------------
Issue:
======
The NNTP (Network News Transport Protocol) service in Windows NT 4.0
and Windows 2000 contains a memory leak in a routine that processes
news postings. Each time such a posting is processed that contains a
particular construction, the memory leak causes a small amount of
memory to no longer be available for use. If an attacker sent a large
number of posts, the server memory could be depleted to the point at
which normal service would be disrupted. An affected server could be
restored to normal service by rebooting.
Mitigating Factors:
====================
- Windows NT 4.0 does not contain a native NNTP service. NNTP
is only available on the system if the Windows NT 4.0 Option
Pack has been installed.
- The default configuration of NNTP is not affected by the
vulnerability, as no newsgroups are configured by default.
- The vulnerability would not enable an attacker to usurp any
administrative control or compromise data on the machine.
Patch Availability:
===================
- A patch is available to fix this vulnerability. Please read the
Security Bulletin
http://www.microsoft.com/technet/security/bulletin/ms01-043.asp
for information on obtaining this patch.
Acknowledgment:
===============
- Aiden ORawe
- ---------------------------------------------------------------------
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WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF
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MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES
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