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Advisory: Specially crafted Java applets can crash Opera

Summary

A specially crafted Java applet can cause Opera to crash.

Severity: Not exploitable

Problem description

Java code using LiveConnect methods to remove a property of a JavaScript object may in some cases use null pointers that can make Opera crash. This crash is not exploitable and such code is rare on the web.

Opera's response

Opera Software has released version 8.51, where this bug is fixed.

Credits

Thanks to Marc Schönefeld for informing us about this crash.

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