Opera struck by hidden hole

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December 14, 2005 (TechWorld.com) -- A security bug in the Opera Web browser could trick users into running malicious code, security experts have warned. The hole is similar to one discovered in Internet Explorer and patched by Microsoft yesterday.
The flaw involves the way Opera processes mouse clicks in new browser windows, according to security research firm Secunia. The mouse-click bug can be used to hide a "File Download" dialogue box underneath a new browser window, which responds to mouse clicks even though it isn't visible.
Because the "Run" button of the dialogue box appears in a predictable position, an attacker could trick the user into activating it by clicking in a specific area in the new browser window, Secunia said.
"This will result in an unintended click of the "Run" button in the hidden "File Download" dialog box," the company said in an advisory.
Secunia notified Opera of the bug in June, and it was fixed in July, but disclosure was delayed while Microsoft fixed a similar bug in Internet Explorer, Secunia said.
The flaw is eliminated in Opera version 8.02, available from Opera's Web site. Version 8.01 is affected, and previous versions are likely to be affected as well, Secunia said.

Reprinted with permission from

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