Dear Valued Microsoft Customer,
We are contacting you today to make you
aware that we have released Microsoft
Security Bulletin MS03-039 today, September
10, 2003. This bulletin details three
critical vulnerabilities in the Windows
operating system and provides instructions
for applying the corresponding patch. While
there is currently no active exploit of this
vulnerability, if successfully exploited,
these vulnerabilities would allow an
attacker to gain control of the target
system.
We strongly encourage you to obtain and
deploy this patch to any affected system
that connects to your network; this includes
systems on your local area network and
remote or mobile systems. For the most
current information on affected systems and
recommended remediation steps, please read
the bulletin posted at:
http://www.microsoft.com/technet/security/bulletin/ms03-039.asp
We understand the potential effect this
situation and the recommended remediation
steps may have on you. Microsoft is
committed to providing you with information
and tools to help run your enterprise safely
and reliably on an on-going basis. When we
become aware of vulnerabilities, it is our
goal to quickly share protection and
remediation information and work in
partnership with you to eliminate these
kinds of threats to your business. In order
to help protect your computing environment
from security vulnerabilities, we strongly
encourage you to visit
http://www.microsoft.com/technet/security/protect and implement the following three steps
in your enterprise:
1. Verify firewall configuration. Audit
Internet and intranet firewalls to ensure
they comply with your security policy; these
are your first line of defense. In
addition, evaluate using host-level
firewalls such as the Internet Connection
Firewall in Windows XP. This is especially
important for systems such as laptops and
home PCs that connect to your network
remotely.
2. Stay up to date. Use update services
from Microsoft to keep your systems up to
date.
. Automatic Updates, available on Windows
XP, Windows 2000 SP3 and SP4, and Windows
Server 2003. Automatic Updates works with
the Windows Update Web site to automate the
process of updating Windows systems.
. Software Update Services (SUS), a
patch-distribution server available for
download from our Web site. SUS enables you
deploy a server in your business that
Automatic Updates clients will use to get
only approved and tested patches.
In addition to using these update services,
we strongly recommend that you subscribe to
Microsoft's free security notification
service at
http://www.microsoft.com/securitynotification, so that you are proactively kept aware of
new security issues.
3. Use and keep antivirus software
up-to-date. Antivirus software programs
will help protect your systems against many
viruses, worms, Trojan horses, and other
malicious code. To protect your systems
from new viruses, it's also important to
obtain up-to-date antivirus signatures
through a subscription service from the
antivirus software vendor. You should not
let remote users or laptops connect to your
network unless they have up-to-date
antivirus software installed. In addition,
consider using antivirus software in
multiple points of your computer
infrastructure, such as on edge Web proxy
systems, as well as on email servers and
gateways.
You should also protect your network by
requiring employees to take the same three
steps with home and laptop PCs they use to
remotely connect to your enterprise, and by
encouraging them to talk with friends and
family to do the same with their PCs. To
make this easier, we have set up a new Web
site to assist PC users at
http://www.microsoft.com/protect.
Again, we want to encourage you to read this
security bulletin and deploy the patch to
your systems. We want to thank you for your
patience and work with you to protect your
business from these kinds of security
threats.
Thank you,
Microsoft Corporation
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