Vulnerability of Critual Update

Posted on 2003-10-28
Last Modified: 2012-06-21
How would I tell if I was actually being attacked by this critical update?? Is there a way to know that the vulnerability is being hit?

Question by:NickMalloy
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Expert Comment

ID: 9637340
Look for the things it mentions in the FAQ. Though, at barely a week old it may not yet be a concern. MSBLAST for example came out several weeks after MS issued a patch.

What would this vulnerability enable an attacker to do?

The vulnerability could allow an unauthenticated attacker to exhaust large amounts of memory on the server. This could cause a state where the server would stop responding to requests. In Exchange 2000 Server, the attacker could also, in the worst case, be able to cause remote code execution.

How could an attacker exploit this vulnerability?

An unauthenticated attacker could seek to exploit this vulnerability by connecting to an SMTP port on the Exchange server and by issuing a specially-crafted extended verb request. These requests can allocate memory on the server and can cause a denial of service. In Exchange 2000 Server, it is also possible to craft the request causing the SMTP service to fail in such a way that an attacker could execute code. This could allow an attacker to take any action on the system in the security context of the SMTP service. By default, the SMTP service runs as Local System.

Can this be exploited directly by using e-mail?

No. This vulnerability could not be exploited by sending a specially-crafted e-mail message to a mailbox that is hosted on an Exchange server. An attacker would have to connect directly to the SMTP port on an Exchange server.

Author Comment

ID: 9637397
So the only way that I could be attacked with this is by connecting to the port? So I would know if I was being attacked by if the user is using the SMTP port? Say like telneting

Expert Comment

ID: 9637428
Yes, that would be the most likely approach... though you can script telnet sessions.
Edgartown IT Case Study

Learn about Edgartown's quest to ensure the safety and security of the entire town's employee and citizen data. Read the case study!


Author Comment

ID: 9637511
Our mail server has slowed down in the past few days. We noticed that this critical update didn't get installed properly. We want to make sure that this vunerability isn't the cause of it. How could you tell this? I guess that is what I am trying to find out. How can I rule out this vunerability. ?

Accepted Solution

JasonBigham earned 250 total points
ID: 9637536
Best way to rule it out... make sure the patch installs properly. This patch is so new though, I'd be inclined to look elsewhere... after applying the patch of course.

There could be numerous other (non hacker) related reasons for slowdowns... time to bust out perfmon.

Author Comment

ID: 9637559
what is perfmon??

Expert Comment

ID: 9637573
Performance Monitor

LVL 10

Expert Comment

ID: 9637575
046 shuts down your IMC.  047 allows code execution.  If your IMC isnt shutting down then you don't have a 046 problem.  If you having performance problems, you can run perfmon to see what applications are using your resources.  Task manager might be suggested for CPU utilization, but perfmon gives you a better view into most resources.

You first need to find out what you are having performance problems.  Once you find that out, you'll know if you have been compromised.

LVL 35

Expert Comment

ID: 9637813
Could not really understand your question, you mean, how you find out, if somebody has attacked your server using this vulnerability? Following the description, it is a "denial of service" attack or force a "buffer overrun" , means, as long as your server is still working and your memory is in a usual range, everything seems to be OK.

As this issue is a potential risk as remote code execution is possible if a buffer overrun state is reached, you should install it.

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
This article will help to fix the below error for MS Exchange server 2010 I. Out Of office not working II. Certificate error "name on the security certificate is invalid or does not match the name of the site" III. Make Internal URLs and External…
In this video we show how to create an email address policy in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Mail Flow…
This video discusses moving either the default database or any database to a new volume.

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question