RE: [Full-disclosure] Re: Bypassing Personal Firewall (ZoneAlarmPro)Using DDE-IPC

["Debasis Mohanty" <mail@xxxxxxxxxxxxxxxxxx>]

Hey TZ,  
>> I am not sure we are speaking about the same attack. When I was speaking
about SendMessage() 
>> I was refering to the presentation at CCC2003, i.e shelling IE simulating
a user through SendMessage() Api.

As this wasn't clear in your previous reply so I got it wrong. Anyway thanks
for clarifying ... :)

>> AFAIK, it does not, the Shatter Attack doesn't necessarely rely on
SendMessage(), 
>> not to mention a driver shouldn't open a window at all 

Very true .. The shatter attack & DDE problem is partially resolved by ZA
current version as long the attack takes place at ring-3. I haven't checked
it for ring-0 so can't comment on it. 

- D



-----Original Message-----
From: full-disclosure-bounces@xxxxxxxxxxxxxxxxx
[mailto:full-disclosure-bounces@xxxxxxxxxxxxxxxxx] On Behalf Of Thierry
Zoller
Sent: Saturday, October 01, 2005 9:03 PM
To: full-disclosure@xxxxxxxxxxxxxxxxx
Subject: Re: [Full-disclosure] Re: Bypassing Personal Firewall
(ZoneAlarmPro)Using DDE-IPC


Dear Debasis,
DM> I tested this earlier, SendMessage() / SetDlgItem() / 
DM> SetWindowText() doesn't work for the current version of ZA Products 
DM> (ZA Pro / Internet Sec Suit).
I am not sure we are speaking about the same attack. When I was speaking
about SendMessage() I was refering to the presentation at CCC2003, i.e
shelling IE simulating a user through SendMessage() Api.

DM> This helps preventing the most wellknown windows local attack - 
DM> Shatter Attack.
AFAIK, it does not, the Shatter Attack doesn't necessarely rely on
SendMessage(), not to mention a driver shouldn't open a window at all (not
react to F1 messages either) <- if you read this and are a vendor check for
this.. gives SYSTEM rights occasionaly. (through browse -> cmd.exe)

DM> However, I still can see a way out for their latest product... Will 
DM> be updated soon.
Looking forward to it :)


--
Regards,
Thierry Zoller
mailto:Thierry@xxxxxxxxxxxx


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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/