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Re: Netscape Navigator 7.2 failure to isolate browser tabs (was Re: Computer Network Defence Vulnerability Alert State)
From: john.courcoul () mac com
Date: Fri, 27 Aug 2004 01:58:08 -0500

Might as well try and be useful with this and see what other Mac browsers get bitten by this bug. Do note that all my 
tests have been done on MacOS X 10.3.5, with the latest Java 1.4.2 Update 1 and Developer packages installed.

Netscape Navigator 7.2  -  Vulnerable (subject of the original mail)
Netscape Navigator 7.1  -  Vulnerable (buggy here too)
Netscape Navigator 7.0.2 -  NOT vulnerable (Amazing ! Ain't we supposed to be improving over time ?)

Mozilla 1.7.2                   -  Vulnerable (figures; Navigator 7.2 is based on this)
Firefox 0.9.3                   -  Vulnerable (Mozilla's kid brother, limps from same foot...)
Camino 0.8.1                    -  NOT vulnerable (some residue might appear on the next tab, but applet is inoperative)

Opera 7.5.4                     -  NOT vulnerable (does not have tabbed browsing)
iCab 2.9.8                              -  NOT vulnerable (plus, the page did not load correctly)
OmniWeb 5.0.1                   -  NOT vulnerable
MSIE 5.2.3                              -  NOT vulnerable (does not have tabbed browsing)

Interesting, how the bug crept into the Netscape/Mozilla codebase after 7.0.2 and has remained there ever since. 


J. Courcoul

On Thursday, August 26, 2004, at 05:32PM, <john.courcoul () mac com> wrote:

Didn't think I'd ever get the chance to report some form of vulnerability,  but I did. Minor, granted, but a bug 

Use the latest browser from Netscape, Gecko/20040804 Netscape/7.2, set up for tabbed browsing, on a MacOS X 10.3.5 
platform with all the latest patches. Open Andy Cuff's "radar" page in the first tab: it sets up two scrolling 
displays (Security News and Vulnerabilities) on the left side of the window and a date ticker in the middle, under  
"Operational Picture". Open a new tab, which should be completely independent and allow you to browse another site 
without interference. Not a chance: the scrolling displays and the date ticker promptly highjack the new pane and 
display their info on it, on top of any page you should happen to load there. And the scrollers are "live" in whatever 
tab they have highjacked: click on any of the items they are displaying, and the corresponding page gets loaded on the 
highjacked tab, NOT on the original "radar" tab. Only until you close the "radar" tab do the scrollers and ticker go 
away in all other tabs.

Works the other way around too: create a bunch of tabs and load all sorts of different sites on them. On the very last 
tab, open Andy's page. It promptly takes over all tabs and splashes the scrollers and ticker all over the place.

In this case, just a nuisance, but might conceivably be misused. Since this information is placed on top of the 
highjacked tabs,  and will cause a new page to load on that tab, a carefully crafted scroller or ticker could 
misdirect a user trying to do banking on a tab to be redirected to a hostile server elsewhere (i.e., carefully place 
the scroller on top of the "submit" button, tell the user that the operation failed and get them to retype their 
private info.)

Could this be classified as "phishing" ?

J. Courcoul

Andy Cuff wrote:

Hi All,
As a great believer in being able to track emerging vulnerabilities with
minimal effort, I have created another "Alert State" image.
http://securitywizardry.com/radar.htm  However, I have tried to make it a
lot more granular dividing the image up into OS and Applications and
reducing the alert states to just 3. At present I'm tracking the
vulnerabilities myself, though I'm hoping some kind hearted vulnerability
alert service such as one of these http://securitywizardry.com/alert.htm
will offer to notify me when significant vulnerabilities occur that may
warrant a change in an enterprises CND posture. I hope you find it of use,

Advice, criticism, bitchin' etc welcomed as always

-andy cuff
Talisker's Computer Security Portal
Computer Network Defence Ltd

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