Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2001.345 -- Microsoft Security Bulletin MS01-043
NNTP Service in Windows NT 4.0 and Windows 2000 Contains Memory Leak
16 August 2001
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: NNTP Service
Vendor: Microsoft
Operating System: Windows NT 4.0
Windows 2000
Impact: Denial of Service
Access Required: Remote
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----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
- - ---------------------------------------------------------------------
THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED
"AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL
WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
SHALL
MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES
WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL,
LOSS
OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION
OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR
CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY
NOT
APPLY.
- -----BEGIN PGP SIGNATURE-----
Version: PGP 7.1
iQEVAwUBO3nBYo0ZSRQxA/UrAQEE0gf+MtGVrVnzY49gW8FN4Db3/2kGn0HGzpTx
HGsqruIKgNcz6H5dZVt2TGGdnPaBLXbRXyT7L+Ibgu2aEZ8QQLzVu0kkOvvrFv0s
7e8z2r4CB241g1CIIiSxDQNKhS3LWBLDMOrA2lWcCewIVwzThHGTTXv9m3i605rU
6H9sI9ZememeDG3hA3D68TrdPzWSe6HfLowpFM5tboyCAOK6S8vUQMfZizkpdLA4
P1qXHod4KL+q8V8XKf8+XefPs/gkCsA8XcA1UfROl8Y3V0erhfcO7lGr7NwXpobO
c6v1zjm7etF8D1fdSeepCxxz+6orhmkAq9Dy5WIL/Zpvb/qsANR/qA==
=EtWv
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key
iQCVAwUBO3uS2Ch9+71yA2DNAQEkwwP/X+MiBrOQCeJorWSSQq6Oo12yt6afE9et
ibqT9sElxpIyF/Zgj6O1k/4VHSrnQfWChW3/p82EzsjTge0MbNxONik/t0BquN7C
3rbpWa/9GlGvJrIaBZmeTbaL4zuL1FM0p4f33A3PKipSU0IrdA/OjYeb1T3WXfcO
eQc6dg+UkK0=
=uvOY
-----END PGP SIGNATURE-----