Re: Fw: MS04-11, SSL, and ISA Server

  • From: Jim Harrison <jim@xxxxxxxxxxxx>
  • To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Wed, 05 May 2004 16:27:01 -0700

He stole it...
;-p

  Jim Harrison
  MCP(NT4, W2K), A+, Network+, PCG
  http://isaserver.org/Jim_Harrison/
  http://isatools.org
  Read the help / books / articles!


On Thu, 6 May 2004 08:43:41 +1000
 "Greg Mulholland" <gregstelatel@xxxxxxxxxxx> wrote:
http://www.ISAserver.org

That's a good one Tom, I'll have to remember that 


Greg Mulholland
Stelatel Communications
Unit 3 641-643 Centre Rd 
Bentleigh East, VIC
Phone: (03) 9576-5699
Fax:   (03) 9576-5899
gregstelatel@xxxxxxxxxxx
www.stelatel.com

 
-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] 
Sent: Thursday, 6 May 2004 8:10 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Fw: MS04-11, SSL, and ISA Server

http://www.ISAserver.org

Hi Jim,

Or as I tell Debi:

"You can tell me to do it, or you can tell me how to do it, but not both"

:-)

Tom 

-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, May 05, 2004 3:59 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Fw: MS04-11, SSL, and ISA Server

http://www.ISAserver.org

..as we've both said; "secure, fast or reliable; pick two"...

  Jim Harrison
  MCP(NT4, W2K), A+, Network+, PCG
  http://isaserver.org/Jim_Harrison/
  http://isatools.org
  Read the help / books / articles!


On Wed, 5 May 2004 14:46:45 -0500
 "Thomas W Shinder" <tshinder@xxxxxxxxxxx> wrote:
http://www.ISAserver.org

Futher argument that ISA and SBS aren't two great tastes that taste great
together on the edge. The poor firewall can't even do its job when using
packet filters. Might as well just put a pix in front of it and forget ISA
:-\

Thomas W Shinder
www.isaserver.org/shinder
ISA 2004 Beta - Get it now!
http://www.microsoft.com/isaserver/beta/default.asp
ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server:
http://tinyurl.com/1llp

 


-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, May 05, 2004 2:51 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Fw: MS04-11, SSL, and ISA Server


http://www.ISAserver.org

Actually, the reason they chose that method is becuase of the custom ASP.Net
apps they created for SBS.
They need direct access to teh Client IP and web publishing can't do it.
Additionally, server publishing to the local host gets you a source-IP of
127.0.0.1, so that option is also out.

  Jim Harrison
  MCP(NT4, W2K), A+, Network+, PCG
  http://isaserver.org/Jim_Harrison/
  http://isatools.org
  Read the help / books / articles!


On Wed, 5 May 2004 14:36:10 -0500
 "Thomas W Shinder" <tshinder@xxxxxxxxxxx> wrote:
http://www.ISAserver.org

Hi Jim,

But I want to run OWA on my SBS box using packet filters for inbound TCP
443!

;-)

Just to NO to ISA on SBS[TM]

Tom

Thomas W Shinder
www.isaserver.org/shinder
ISA 2004 Beta - Get it now!
http://www.microsoft.com/isaserver/beta/default.asp
ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server:
http://tinyurl.com/1llp

 


-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, May 05, 2004 2:41 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Fw: MS04-11, SSL, and ISA Server


http://www.ISAserver.org

The flag is not only flying, the wind is about to tear it off in shreds.

"ISA" istelf is not vulnerable.
"Windows", which is what ISA runs on, may be vulnerable, depending on:
1. how ISA is configured
2. where the request is targeted.
3. what other applications (can we say IIS?) is running on the box

I've personally tested this with two different forms of the exploit and
I can state with complete assurance that at no point was the ISA web
proxy service vulnerable to this attack.

Details must accompany all claims of knowledge.

  Jim Harrison
  MCP(NT4, W2K), A+, Network+, PCG
  http://isaserver.org/Jim_Harrison/
  http://isatools.org
  Read the help / books / articles!


On Wed, 5 May 2004 09:56:37 -0700
 "Thor" <thor@xxxxxxxxxxxxxxx> wrote:
http://www.ISAserver.org

Go get 'em, Jim.

----- Original Message ----- 
From: "Kim, Cameron" <CKim@xxxxxxxx>
To: <NTBUGTRAQ@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Tuesday, May 04, 2004 10:16 AM
Subject: FW: MS04-11, SSL, and ISA Server


I found this response to be very interesting. Thought people might want
to know.


Cameron Kim
Mitsubishi Digital Electronics America

-----Original Message-----
From: Kayne Ian (Softlab) [mailto:Ian.Kayne@xxxxxxxxxxxxx]
Sent: Tuesday, May 04, 2004 3:42 AM
To: Kim, Cameron
Subject: RE: MS04-11, SSL, and ISA Server

Yes, it is vulnerable in every scenario. I've personally verified this
using the remote shell exploit floating around. In one of the MS
bulletins they state that ISA can prevent this vuln when all packet
filters are enabled - I found this NOT to be true. ISA remained
vulnerable. After the patch is installed, ISA starts logging SChannel
errors when the vuln is attempted to be exploited.

HTH.

> -----Original Message-----
> From: Kim, Cameron [mailto:CKim@xxxxxxxx]
> Sent: 29 April 2004 02:12
> To: NTBUGTRAQ@xxxxxxxxxxxxxxxxxxxxxx
> Subject: MS04-11, SSL, and ISA Server
>
>
> Can this DoS be performed against an ISA server which proxies the SSL
> connections? Most of the reports and comments have mentioned the fact
> that DoS can be performed against IIS servers using SSL connections.
> But I am not sure if the ISA Server 2000 web proxy actually uses the
> Microsoft SSL Library. One would suppose so...
>
> Cameron Kim
> Mitsubishi Digital Electronics America
>
> -----
> Earn up to 10 credit course hours toward the TruSecure ICSA
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> attending the Infosecurity Canada 2004 conference.
> Featured speaker, Marcus J. Ranum, TruSecure inventor of the proxy
> firewall will present on June 3 at 11:30 AM.  Visit
<https://ticsa.trusecure.com>  for certification details and
<http://www.infosecuritycanada.com>  for conference information.  Become
TICSA certified and see what happens!
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