Millions at risk from browser flaw
Millions at risk from browser flaw

Phishers catch out Firefox

Browser open to URL spoofing

Robert Jaques

A security flaw in the increasingly popular Firefox browser is exposing millions of users to phishing scams, security experts have warned.

Jakob Balle, security specialist at Secunia Research, said that the vulnerability in Firefox and Mozilla allows malicious hackers to execute phishing scams by spoofing the source URL displayed in the browser's Download Dialog box.

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"The problem is that long sub-domains and paths are not displayed correctly, which can be exploited to obfuscate what is being displayed in the source field of the Download Dialog box," he said.

A Secunia Research advisory stated that the "less critical" vulnerability has been confirmed in Mozilla 1.7.3 for Linux, Mozilla 1.7.5 for Windows, and Mozilla Firefox 1.0. It added that "other versions may also be affected".

"Currently, no solution is available. However, the vendor reports that this vulnerability will be fixed in upcoming versions of the affected products," Secunia stated.

Balle urged users not to follow download links from untrusted sources.

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Further reading

Firefox users urged to download security update

Firefox foils phishing flaw

Security update fixes spoofing and arbitrary code execution, says Mozilla

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Firefox hits 25 million downloads

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Spoofing flaw hits web browsers

Security firm warns of phishing risk with Firefox, Opera and others

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