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Bekijk Volledige Versie : Re: Norton AntiVirus 2004 Script Blocking Failure (Includes PoC



18/10/04, 21:05
In-Reply-To: <416F7ABB.8070502@myrealshoebox.com>

Symantec is aware of this posting. Symantec engineers are reviewing this issue. If it is validated we will respond accordingly.

Symantec takes the security of our products seriously. We are a responsible disclosure organization. We would like to work directly with anyone who believes they have found a security issue in a Symantec product to validate the problem and coordinate a
response.

Please contact secure@symantec.com concerning security issues with Symantec products.

Symantec Product Security
secure@symantec.com

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>Date: Fri, 15 Oct 2004 03:22:35 -0400
>From: Daniel Milisic <dmilisic@myrealshoebox.com>
>User-Agent: Mozilla Thunderbird 0.8 (Windows/20040913)
>X-Accept-Language: en-us, en
>MIME-Version: 1.0
>To: full-disclosure@lists.netsys.com
>Cc: bugtraq@securityfocus.com
>Subject: Norton AntiVirus 2004 Script Blocking Failure (Includes PoC and rant)
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>Content-Transfer-Encoding: 7bit
>
>Hi All,
>
>For the last couple of week's I've been hands-and-face into a project
>that is based heavily on .HTA apps. Basically, the VBScript embedded in
>the HTA handles the front-end for some basic console-driven tools. It
>was also designed to be very simple as to work equally well under
>95+IE5.5 to Win2003. Worked really nice... HOWEVER during the testing
>phase on various platforms, I discovered my .HTA grinds to a halt on
>machines running Norton AntiVirus 2004, thanks to the "Script Blocking"
>feature. A prompt or alert from the damn AV software was NOT something
>I wanted my users to deal with. So, I downloaded the TrialWare version
>from Symantec to take a poke at whether or not I could work around it.
>
>Here's how that went...
>
>One 25MB Download and I was all set to start testing! But wait, I
>should LiveUpdate...
>LiveUpdate, 4MB -- REBOOT #1 (*mandatory* restart)
>LiveUpdate, 3MB -- REBOOT #2 (Prompt to restart with an option to continue)
>LiveUpdate, 1MB -- REBOOT #3 (Right now I am thinking oh you have got to
>be <bleep>ing kidding me, THREE REBOOTS to get up-to-date AV installed!)
>
>Grisoft's AVG6, for comparison sake, is about 7MB in total I believe,
>and requires a single reboot. It doesn't have Script Blocking, but if
>you're thoughtless enough to click on a .vbs e-mail attachment you
>pretty much deserve what's coming to you ;)
>
>Once out of reboot hell, I fired up the NAV2004 console, an annoyingly
>tacky HTA-ish type front-end with more bling-bling than functionality.
>Over the last few years I've grown to really dislike NAV for this, and
>not just because of the aesthetics. On more than one occasion I'd see a
>virus or spyware infected PC with NAV on it (user error not NAV's
>fault); with the NAV console just a smoldering pile of script errors
>after the malicious program hosed IE's rendering engine. The NAV
---------------snip------------------------

21/10/04, 01:55
In-Reply-To: <20041018172444.19798.qmail@www.securityfocus.com>

Update: October 19, 2004

Recent published advisories and media stories are reporting that this attack can kill the Auto-Protect feature of Norton AntiVirus. This is incorrect.

Investigations into this issue by Symantec have determined this attack terminates the CCApp.exe executable. This leads to the disappearance of the Norton AntiVirus icon in the system tray, and disables notification of Auto-Protect. It does not terminate A
uto-Protect itself. The user’s system is still protected.

Protection can be verified by using the EICAR test file (see ww.eicar.com/anti_virus_test_file.htm). When this test file is saved to the system there is no notification by Auto-Protect. The file is prevented from being written to disk by the still functio
nal Auto-Protect. Once CCApp.exe is restarted, Auto-Protect notification resumes and the tray icon reappears.

Symantec Vulnerability Response