A vulnerability has been discovered in the Opera web browser, which could be used to take over users’ systems.
The flaw has been rated as “highly critical” by internet security company Secunia. The problem is caused by an integer overflow when the Opera browser processes Jpeg images.
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A specially crafted Jpeg image could be used to run arbitrary code on users’ machines as a result.
The potential security threat was first reported by security management firm VigilantMinds.
The flaw affects version 8.54 of the Opera browser, but may additionally affect older versions of the browser.
Users can avoid the threat by upgrading to Opera 9. Opera has no more than 1% of the total browser market. In contrast, number two browser market player Firefox has around 10%, and Microsoft’s Internet Explorer has around 85%.