Feeds

Mozilla admits Firefox add-on malware false alarm

One item of AMO badness just a blank

Providing a secure and efficient Helpdesk

Updated Mozilla has admitted it erred in labelling one of the two Firefox add-ons offered for download from its official add-on site as malign last week.

Warnings that version 4.0 of Sothink Video Downloader add-on was contaminated by a Trojan were wrong and down to a false positive triggered by an anti-virus scanner used by Mozilla rather than the presence of real malware. The add-on, withdrawn from download last week because of malware concerns, has now been restored.

In a blog posting on Tuesday, Mozilla apologised for the mix-up and confirmed the other add-on under suspicion, Master Filer, is infected by the Bifrose Trojan and remains blacklisted.

The open source browser firm thanked McAfee for helping it sort out the confusion. It's not clear whose scanner triggered the false alert in the first place.

Mozilla revised its estimates that 6,000 downloads of potentially infected downloads might have taken place radically downwards. It now reckons its site might have served up malware-laced Firefox plug-ins fewer than 700 times.

As previously reported, Master Filer was downloaded 600 times between September 2009 and January from Mozilla's official add-on site before potential problems were detected. A scanning tool used to check add-ons during the upload process failed to detect anything awry even though the password-stealing Trojan strain it was infected with has been detected by commercial scanners since October 2008.

Malware infection in Firefox add-ons is rare but not unprecedented. In May 2008, the open source browser supplier warned that a Vietnamese language pack for Firefox 2 was contaminated with adware. ®

New hybrid storage solutions

More from The Register

next story
Google recommends pronounceable passwords
Super Chrome goes into battle with Mr Mxyzptlk
Apple Pay is a tidy payday for Apple with 0.15% cut, sources say
Cupertino slurps 15 cents from every $100 purchase
Reddit wipes clean leaked celeb nudie pics, tells users to zip it
Now we've had all THAT TRAFFIC, we 'deplore' this theft
YouTube, Amazon and Yahoo! caught in malvertising mess
Cisco says 'Kyle and Stan' attack is spreading through compromised ad networks
TorrentLocker unpicked: Crypto coding shocker defeats extortionists
Lousy XOR opens door into which victims can shove a foot
Greater dev access to iOS 8 will put us AT RISK from HACKERS
Knocking holes in Apple's walled garden could backfire, says securo-chap
Microsoft to patch ASP.NET mess even if you don't
We know what's good for you, because we made the mess says Redmond
NORKS ban Wi-Fi and satellite internet at embassies
Crackdown on tardy diplomatic sysadmins providing accidental unfiltered internet access
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Top 5 reasons to deploy VMware with Tegile
Data demand and the rise of virtualization is challenging IT teams to deliver storage performance, scalability and capacity that can keep up, while maximizing efficiency.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.