Home » 2009 » April » 30 » TZO-16-2009] Nod32 CAB bypass/evasion
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TZO-16-2009] Nod32 CAB bypass/evasion

   From the low-hanging-fruit-department - Nod32 CAB bypass/evasion

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 :

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 NOD32 Antivirus for Linux gateway devices (update #4036)

I. Background
ESET develops software solutions that deliver instant, comprehensive protection
against evolving computer security threats. ESET NOD32® 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.


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 :

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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