FW: [Fwd: Re[2]: Fun with event logs (semi-offtopic)]

["BART. ...." <need4angel () hotmail com>]

Dear 3APA3A,

Correct me if i am wrong, but it looks like it's documented behavior of the 
event viewer.
This is what i found:

Note that there is no way to log a string that contains %n, where n is an 
integer value. This syntax is used in IPv6 addresses, so it is a problem to 
log an event message that contains an IPv6 address. For example, if the 
message text contains %1, the event viewer treats it as an insertion string. 
If the string contains %%1, the event viewer literally uses %%1.

Source:
http://msdn2.microsoft.com/en-us/library/aa363679.aspx

Greetz,
B

> -------- Original Message --------
> Subject:       Re[2]: [Full-disclosure] Fun with event logs (semi-offtopic)
> Date:  Thu, 21 Dec 2006 20:13:14 +0300
> From:  3APA3A <3APA3A () SECURITY NNOV RU>
> Reply-To:      3APA3A <3APA3A () SECURITY NNOV RU>
> Organization:  http://www.security.nnov.ru
> To:    Michele Cicciotti <mc () khamsa net>
> CC:    full-disclosure () lists grok org uk, bugtraq () securityfocus com
> References:    <20061221122536.6AA7A1D8F7C () supertolla itapac net> 
> <20061221152104.A96731D8F79 () supertolla itapac net>
>
>
>
> Dear Michele Cicciotti,
>
> --Thursday, December 21, 2006, 6:20:54 PM, you wrote to 
> full-disclosure () lists grok org uk:
>
> > > There  is  interesting  thing  with  event  logging on Windows. The only
> > > security  aspect  of  it  is  event log record tampering and performance
> > > degradation,  but  it may become sensitive is some 3rd party software is
> > > used for automated event log analysis.
>
> MC> I doubt this. The event logs don't contain the actual formatted
> MC> string, because the template string is localized and only retrieved
> MC> when the entry is displayed - what is logged is just a message id
> MC> and the string inserts (see documentation for EVENTLOGRECORD).
> MC> FormatMessage (which is used to build the full message to display to
> MC> the user) isn't the culprit, either, because it doesn't operate
> MC> recursively (that would have bizarre consequences, since
>
> As  I  wrote,  my message is semi-offtopic, because it's more fun than
> any  security  vulnerability  here.
>
> Yes,  probably  this  bug  only  affects  event  viewer  itself. I don't
> understand  how  and why Microsoft achieved this effect in event viewer,
> which  is,  by  the  way,  security tool, and if it's hard for different
> vendor  to  make  same  mistake. It doesn't look like Easter egg, but if
> FormatMessage  does  not recursion it needs to be specially coded and it
> does  nothing  except this bug. Bug, that needs to be specially coded is
> new funny bug category, isn't it?
>
> --
> ~/ZARAZA
> http://www.security.nnov.ru/

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