Firefox
Firefox open to buffer overflow
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Security hole hits Firefox

Buffer overflow flaw affects all versions of the open source browser

Tom Sanders in California, vnunet.com 12 Sep 2005
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Mozilla's Firefox browser is susceptible to a buffer overflow attack that is deemed 'highly critical', users have been warned.

The flaw was discovered by security expert Tom Ferris and affects all versions of the open source browser up to 1.0.6, as well as the beta for Firefox 1.5, he reported on his website

The vulnerability allows an attacker to remotely execute code on a compromised system through a buffer overflow attack.

Demonstrating the vulnerability, Ferris offers a link to a page where a specially crafted URL will cause the browser to freeze and eventually crash, closing all browser windows. Microsoft's Internet Explorer is unaffected by the flaw.

Ferris reported the issue to Mozilla on 4 September, but allegedly decided to go public after a disagreement with the organisation.

Mozilla has published a patch that protects the browser against sites seeking to exploit the flaw, and has posted instructions for a manual workaround.

Firefox uses its record on security as a principal selling point in enticing users to switch from Internet Explorer. But although Microsoft's browser has been hit with a series of vulnerabilities, Firefox has also had its share of problems recently. 

See also:

Next public version scheduled for September  25 Jul 2005
FirefoxTrying to send spam to the savvy  18 Jul 2005
Users urged to upgrade to new versionFoundation responds quickly to security bug  13 May 2005
Users advised to diasable JavaScript in Firefox browserHoles could allow hackers to implant Trojan or key-logger  09 May 2005
Malicious code in an image could enter PC through browserUsers urged to download patched version immediately  24 Mar 2005

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