Just when you thought it was safe !#$%

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Rollin' Rog

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http://www.microsoft.com/technet/treeview/?url=/technet/security/bulletin/MS03-039.asp


Technical description:

The fix provided by this patch supersedes the one included in Microsoft Security Bulletin MS03-026 and includes the fix for the security vulnerability discussed in MS03-026, as well as 3 newly discovered vulnerabilities.

Remote Procedure Call (RPC) is a protocol used by the Windows operating system. RPC provides an inter-process communication mechanism that allows a program running on one computer to seamlessly access services on another computer. The protocol itself is derived from the Open Software Foundation (OSF) RPC protocol, but with the addition of some Microsoft specific extensions.

There are three newly identified vulnerabilities in the part of RPCSS Service that deals with RPC messages for DCOM activation? two that could allow arbitrary code execution and one that could result in a denial of service. The flaws result from incorrect handling of malformed messages. These particular vulnerabilities affect the Distributed Component Object Model (DCOM) interface within the RPCSS Service. This interface handles DCOM object activation requests that are sent from one machine to another.

An attacker who successfully exploited these vulnerabilities could be able to run code with Local System privileges on an affected system, or could cause the RPCSS Service to fail. The attacker could then be able to take any action on the system, including installing programs, viewing, changing or deleting data, or creating new accounts with full privileges.

To exploit these vulnerabilities, an attacker could create a program to send a malformed RPC message to a vulnerable system targeting the RPCSS Service.

Microsoft has released a tool that can be used to scan a network for the presence of systems which have not had the MS03-039 patch installed. More details on this tool are available in Microsoft Knowledge Base article 827363. This tool supersedes the one provided in Microsoft Knowledge Base article 826369. If the tool provided in Microsoft Knowledge Base Article 826369 is used against a system which has installed the security patch provided with this bulletin, the superseded tool will incorrectly report that the system is missing the patch provided in MS03-026. Microsoft encourages customers to run the latest version of the tool available in Microsoft Knowledge Base article 827363 to determine if their systems are patched.

Mitigating factors:

Firewall best practices and standard default firewall configurations can help protect networks from remote attacks originating outside of the enterprise perimeter. Best practices recommend blocking all ports that are not actually being used. For this reason, most systems attached to the Internet should have a minimal number of the affected ports exposed.For more information about the ports used by RPC, visit the following Microsoft Web site:

http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/tcpip/part4/tcpappc.asp
 
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Mar 15, 2003
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OMG!!! Besides the "Technical definition", is there one in English?? All this RPC, RPCSS, DCOM, MS03-039, exploited vulnerabilities, Local System Privileges made me dizzy! :confused: I had to look and make sure I came into the correct forum. Are layman people like myself supposed to understand this? Or am I blond and dumb?

I'm really not trying to be a smartellec, but this really made me feel like I shouldn't be here.

Just my two cents
BabyG :)
 
Joined
Jul 3, 2003
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Baby G, in a nutshell what this means is Microsoft has issued another critical update to prevent a couple of new vulnerabilities they've identified.

Easiest way is to go to Start/Windows updates, scan for updates and download critical updates. Reboot when prompted.
 
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Feb 28, 2001
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BabyG
Basically what the Security bulletin is saying is this........
Microsoft rushed to stick there finger in the security dike and doing so missed a few other holes or even worse created new ones.
So bottom line is if you have an operating system that is affected by this problem then it is best to download the patch.

Dave

PS: It is not unusual to have many security patch's for a problem once found.

PSS: Welcome Fellow Wisconsinite! Cookies......
 
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Thanks Guys,

I really appreciate the explanation. Now I know I was intended to read that, as I am operating Win XP, so I downloaded the patch. :)

Thanks Again,
BabyG :)
 

Rollin' Rog

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Dec 9, 2000
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45,855
I expect we're going to need to brace ourselves for another TSG onslaught. Maybe we'll break the old record :D

I hope the Logoff script thread in this forum is not related; but if it is, it's going to be real bummer, most people won't even be able to connect to get help
 
Joined
Oct 13, 2002
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"aw shut your cake- hole and just download the patch.
Nevermind what it is"

Well I know this was not directed to me but it could have been because I was just about to ask the same question as BabyG! I think this is rude and if there is much of this attitude on here I will say a firm goodbye!
Cheerio
 
Joined
Jul 29, 2003
Messages
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Is their a place where a IT admin can get his hands on the patch so he can do it with out going to each machine and downloading the patch??? ASP PLEASE!

TK
 
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