[TZO-16-2009] Nod32 CAB bypass/evasion

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    From the low-hanging-fruit-department - Nod32 CAB bypass/evasion
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Release mode: Coordinated but limited disclosure.
Ref         : TZO-162009 - Nod32 CAB bypass/evasion
WWW         : http://blog.zoller.lu/2009/04/nod32-eset-cab-generic-evasion-=
limited.html
Status      : No patch, but mitigation recommendations (see below)
Vendor          : http://www.trendmicro.com/       =

Security notification reaction rating : Good
Notification to patch time window : 14 days

Disclosure Policy : =

http://blog.zoller.lu/2008/09/notification-and-disclosure-policy.html

Affected products : =

- ESET Smart Security 4 (update #4036)
- ESET NOD32 Antivirus 4 (update #4036)
- ESET Smart Security 4 Business Edition (update #4036)
- ESET NOD32 Antivirus 4 Business Edition (update #4036)
- ESET NOD32 Antivirus for Exchange Server (update #4036)
- ESET Mail Security  (update #4036)
- ESET NOD32 Antivirus for Lotus Domino Server (update #4036)
- ESET File Security (update #4036)
- ESET Novell Netware (update #4036)
- ESET DELL STORAGE SERVERS (update #4036)
- ESET NOD32 Antivirus for Linux gateway devices (update #4036)


I. Background
~~~~~~~~~~~~~
ESET develops software solutions that deliver instant, comprehensive protec=
tion =

against evolving computer security threats. ESET NOD32=AE Antivirus, is the=
 flagship
product, consistently achieves the highest accolades in all types of =

comparative testing and is the foundational product that builds =

out the ESET product line to include ESET Smart Security.

http://www.eset.com/products/eset_performance_advantages.php


II. Description
~~~~~~~~~~~~~~~
The parsing engine can be bypassed by a specially crafted and formated
CAB archive. Details are currently witheld due to other vendors that are =

in process of deploying patches.

III. Impact
~~~~~~~~~~~
A general description of the impact and nature of AV Bypasses/evasions
can be read at : =

http://blog.zoller.lu/2009/04/case-for-av-bypassesevasions.html

The bug results in denying the engine the possibility to inspect
code within the CAB archive. There is no inspection of the content
at all.


IV. Disclosure timeline
~~~~~~~~~~~~~~~~~~~~~~~~~

13/04/2009 : Send proof of concept, description the terms under which =

             I cooperate and the planned disclosure date
                         =

                         No reply
                         =

17/04/2009 : Resend notification with an indication this will be the last
             attempt to responsibly disclose.
                         =

                         =

17/04/2009 : Eset acknowledges receipt and previous receipt =


29/04/2009 : Eset informs me that the bug was fixed on the 27th of April
             through and auotmatic update (update #4036)
                                                 =

29/04/2009 : Release of this advisory







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