Compromised file found in language pack for Firefox

Share this article:
An add-on for the popular Firefox browser hid potentially malicious code, possibly contaminating the machines of anyone who downloaded it. The add-on was a Vietnamese language pack, and though it has been removed from the official Mozilla add-on website, it was undetected until this week.

Window Snyder, Mozilla's security chief, told SCMagazineUS.com Thursday that “about 1,200 people downloaded the pack every week since Feb. 18. Compared to 170 million users, that's a small number.”

The language pack was a single file that had a remnant of a script tag that could direct a user to a site that would play unsolicited ads.

“It was not an infection, per se, and the site it directed users to is down. The most likely scenario was that users would be seeing unwanted ads,” Snyder said.

How did it get into the pack? Said Snyder, “We did not do forensics on the developer's machine, but the most likely scenario was that the machine was infected and when the developer uploaded the pack to our add-on site, our antivirus software did not detect it.”

The virus signature was not identified until April.

A new language pack will be available shortly. Until then, Vietnamese language pack users should disable this package, she said.
Share this article:
You must be a registered member of SC Magazine to post a comment.

Sign up to our newsletters

TOP COMMENTS

More in News

ISSA tackles workforce gap with career lifecycle program

ISSA tackles workforce gap with career lifecycle program ...

On Thursday, the group launched its Cybersecurity Career Lifecycle (CSCL) program.

Amplification DDoS attacks most popular, according to Symantec

Amplification DDoS attacks most popular, according to Symantec

The company noted in a whitepaper released on Tuesday that Domain Name Server amplification attacks have increased 183 percent between January and August.

Court shutters NY co. selling security software with "no value"

A federal court shut down Pairsys at the request of the Federal Trade Commission.