[ISN] Security UPDATE -- Auditing Your Systems Can Improve Security -- October 19, 2005

InfoSec News isn at c4i.org
Thu Oct 20 02:07:15 EDT 2005


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====================

1. In Focus: Auditing Your Systems Can Improve Security 

2. Security News and Features
   - Recent Security Vulnerabilities
   - Overlooked Security Patches Bring Down Spread Firefox Site
   - Check Point Snaps Up Sourcefire
   - Curious Stirrings in the World of Open Source

3. Instant Poll

4. Security Toolkit
   - Security Matters Blog
   - FAQ
   - Security Forum Featured Thread

5. New and Improved
   - VPN Firewalls Add Malware Protection

====================

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====================

==== 1. In Focus: Auditing Your Systems Can Improve Security 
   by Mark Joseph Edwards, News Editor, mark at ntsecurity / net

As you hopefully know by now, Microsoft released nine security 
bulletins this month as part of its regular patch release schedule. One 
of the bulletins includes a vulnerability in Microsoft Distributed 
Transaction Coordinator (MSDTC). The vulnerability is serious, and an 
exploit has already been created. Although the exploit was created by 
Immunity Security strictly for release to its business customers, by 
the time you read this newsletter, someone else will likely have 
already released another exploit onto the Internet--possibly in the 
form of a worm or Trojan horse, either of which could lead to a 
complete compromise of your entire network. 

Protecting your systems in advance is of paramount concern. The obvious 
approach is to load the patch as soon as you can, and if you can't, for 
whatever reason, then take other defensive measures. MSDTC listens on 
TCP port 3372. Minimally, scan your network to determine which systems 
listen on TCP port 3372. You can disable MSDTC on individual systems or 
by using Group Policy. But doing so might break various types of 
functionality. Review Microsoft Security Bulletin MS05-051--
Vulnerabilities in MSDTC and COM+ Could Allow Remote Code Execution 
(902400) for details.
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The fact that someone created an exploit for the MSDTC vulnerability in 
fewer than 24 hours points out the need to stay on top of vulnerability 
reports and patching. It also points out the need to know precisely 
what software runs on your systems. A fantastic case in point is 
Mozilla Foundation, which I wrote about in a news story on our Web site 
that's also included in this newsletter. 
   http://list.windowsitpro.com/t?ctl=16E67:4FB69

In summary, the Spread Firefox Web site was compromised back in July. 
After that intrusion, Mozilla Foundation rebuilt the entire server. 
But, when doing so, the company failed to properly record what software 
runs on that server. Apparently between July and October, no 
significant audit was performed on the server either. As a result, 
Mozilla Foundation overlooked the fact that TWiki runs on the server, 
although not as a prominent service. (For more information about TWiki, 
go to http://list.windowsitpro.com/t?ctl=16E74:4FB69 )

You can probably guess what happened next: A vulnerability was 
discovered in TWiki, and soon an intruder began attempts to break into 
the Spread Firefox Web site. So Mozilla Foundation once again spent 
considerable time rebuilding a server that was rebuilt only a few 
months prior. The Spread Firefox site was taken offline by October 4, 
and didn't come back online until yesterday. I have no idea what the 
combined incidents cost the company in terms of time and money, but in 
addition to those costs, the incidents cost the organization in terms 
of reputation. 

These sorts of incidents can happen to anybody who doesn't know exactly 
what software runs on their systems and doesn't stay up to date on new 
vulnerabilities. The bottom line is that you're responsible to 
determine what software runs on your systems, and you can't rely on 
your software vendors to consistently provide you the latest 
vulnerability information. The reason for the latter is simple: When 
vulnerabilities are announced to the public (sometimes with only scant 
details), potential intruders can use that information to begin looking 
for a way to breach security. In some cases, all a discoverer needs to 
say is, "I found a problem in XYZ application," and someone else can 
use logic to figure out where the vulnerability might be, find it, and 
develop a way to exploit it. 

The lessons here are clear. In order to maintain optimum network 
security, you must audit your system regularly, keep precise and up-to-
date records, and monitor the Internet for new vulnerability 
developments. Doing so can make even the biggest networks a much 
smaller target. 

====================

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====================

==== 2. Security News and Features ====

Recent Security Vulnerabilities
   If you subscribe to this newsletter, you also receive Security 
Alerts, which inform you about recently discovered security 
vulnerabilities. You can also find information about these 
discoveries at
   http://list.windowsitpro.com/t?ctl=16E61:4FB69

Overlooked Security Patches Bring Down Spread Firefox Site
   Mozilla Foundation overlooked critical patches on its Spread Firefox 
site. As a result, the site was temporarily taken offline and site 
visitors were redirected to the Firefox area of the main Mozilla Web 
site.
   http://list.windowsitpro.com/t?ctl=16E67:4FB69

Check Point Snaps Up Sourcefire
   Check Point Technologies announced a deal to acquire Sourcefire, 
makers of the ever-popular open-source Snort Intrusion Detection System 
(IDS). Check Point will add the Sourcefire line of commercial security 
products to its suite of offerings. 
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Curious Stirrings in the World of Open Source
   Several events in the open-source world have piqued my curiousity. 
What's going on? To see what I mean, read this news item on our Web 
site. 
   http://list.windowsitpro.com/t?ctl=16E69:4FB69

====================

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functions and how to assess whether your backup/restore mechanisms are 
equal to the challenge.
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====================

==== 3. Instant Poll ====

Results of Previous Poll: Have you, your company, or someone you know 
been a victim of online fraud?
   The voting has closed in this Windows IT Pro Security Hot Topic 
nonscientific Instant Poll. Here are the results from the 30 votes:
   - 57% Yes
   - 37% No
   -  7% Not sure
(Deviations from 100% are due to rounding.)

New Instant Poll: Which of the following devices and/or software do you 
monitor?
   Go to the Security Hot Topic and submit your vote for 
   - Windows 
   - Network devices such as firewalls, gateways, VPN appliances, and 
wireless Access Points 
   - Important applications such as Exchange Server and IIS
   - Two or more of the above
   - None of the above
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====================

==== 4. Security Toolkit ==== 

Security Matters Blog: Network Security Toolkit 1.2.3
   by Mark Joseph Edwards, http://list.windowsitpro.com/t?ctl=16E6E:4FB69

Version 1.2.3 of the Network Security Toolkit was recently released. 
This is an excellent toolkit, and if you haven't looked at it, consider 
doing so. This blog entry links to my review of version 1.0.6. 
   http://list.windowsitpro.com/t?ctl=16E68:4FB69

FAQ
   by John Savill, http://list.windowsitpro.com/t?ctl=16E6D:4FB69 

Q: How can I enable access-based share enumeration so that users see 
only files and folders to which they have access? 

Find the answer at
   http://list.windowsitpro.com/t?ctl=16E6B:4FB69

Security Forum Featured Thread: Stop IE from Downloading .exe Files
   A forum participant asks whether there's any way to prevent 
Microsoft Internet Explorer (IE) users from downloading and saving 
.exe, .mp3, and other files to their network drives in a Windows 2000 
environment. Join the discussion at:
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==== 5. New and Improved ====
   by Renee Munshi, products at windowsitpro.com

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