Advertising code inserted by the malicious Xorer worm has been discovered in a plugin for the Firefox web browser that has been downloaded thousands of times in the last three months.
Mozilla’s chief of security, Window Snyder, has confirmed in a post on her blog that HTML files in Firefox’s Vietnamese language pack were carrying a script (detected by Sophos as Mal/Badsrc-A) designed to display irritating advertising messages as users browsed the web. The affected files had been available for download since February 18 2008. The script is not believed to have been planted…
Read more in my article on the Naked Security website.
Found this article interesting? Follow Graham Cluley on Twitter to read more of the exclusive content we post.