Microsoft Security Bulletin (MS00-083)
Patch Available for "Netmon Protocol Parsing" Vulnerability
Originally posted: November 01, 2000
Microsoft has released a patch that eliminates a security
vulnerability in Microsoft(r) Windows NT(r) and Windows(r) 2000
server products and Systems Management Server. The vulnerability
could allow a malicious user to gain control of an affected server.
Frequently asked questions regarding this vulnerability and
the patch can be found at
http://www.microsoft.com/technet/security/bulletin/fq00-083.asp
Microsoft ships two versions of Network Monitor (Netmon): a basic
version that ships with Windows NT 4.0 and Windows 2000 server
products, and full version that ships as part of Systems Management
Server (SMS) 1.2 and 2.0. Both versions include protocol parsers that
aid administrators in interpreting and analyzing previously-captured
network data. However, several of the parsers have unchecked buffers.
If a malicious user delivered a specially-malformed frame to a server
that was monitoring network traffic, and the administrator parsed it
using an affected parser, it would have the effect of either causing
Netmon to fail or causing code of the malicious user's choice to run
on the machine.
Netmon requires administrative privileges to run, but should only be
run by local, rather than domain, administrators. If this is done,
the vulnerability could be used to gain complete control over the
local machine, but could not be used to gain control over a domain.
Netmon does not ship on workstation products, so unless SMS had been
installed on a workstation, it would not be affected by this
vulnerability.
Note: Netmon does not ship as part of Windows NT 4.0 Workstation or
Windows 2000 Professional. These products would only be affected if
SMS had been installed on them.
Note: Customers who are running SMS should apply the SMS patch,
regardless of the platform they are running on. Customers who are not
running SMS but are using an affected server should apply the
operating system patch.
Note:
Note: Additional security patches are available at the Microsoft
Download Center
Please see the following references for more information related to
this issue.
This is a fully supported patch. Information on contacting Microsoft
Product Support Services is available at
http://support.microsoft.com/support/contact/default.asp.
Microsoft thanks COVERT Labs at PGP Security, Inc.
(http://www.pgp.com/), and the ISS X-force (http://xforce.iss.net/)
for reporting this issue to us and working with us to protect
customers.
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Last Updated November 01, 2000
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