Vulnerabilities / Threats
2/5/2010
06:08 PM
Connect Directly
LinkedIn
Twitter
Google+
RSS
E-Mail
50%
50%

Mozilla Removes Two Malicious Firefox Add-Ons

About 4,600 Windows users appear to have downloaded the infected software.

Mozilla on Friday said that it had removed two Firefox add-ons from its Web site because they installed malware.

"Two add-ons in the experimental section of addons.mozilla.org were found to be containing malware," Mozilla said on its security blog. "These were not originally detected with the anti-malware scanning tools that we have been using. We have since increased the number of scanning tools, and will be taking additional steps to minimize the risk of further incidents."

AMO, Mozilla's add-on management group, posted a notice about the malicious add-ons on Thursday.

The malicious add-ons have been identified as version 4.0 of Sothink Web Video Downloader and all versions of Master Filer. According to AMO's blog post, Sothink Web Video Downloader 4.0 included malware known as Win32.LdPinch.gen, while Master Filer included malware known as Win32.Bifrose.32.Bifrose Trojan.

Launching Firefox with either of these add-ons installed on a Windows computer is likely to lead to an infection. Removing the add-on does not remove the trojan software, however. Antivirus software that recognizes the malware is necessary for removal. According to Mozilla, the following antivirus apps will work: Antiy-AVL, Avast, AVG, GData, Ikarus, K7AntiVirus, McAfee, Norman, and VBA32.

Last May, security researcher Duarte Silva created a proof-of-concept malicious add-on, or "maladon," to highlight problems in Firefox's add-on security model.

Mozilla has made some security improvements since then, such as locking down Firefox's components directory. But the discovery of infected add-ons on Mozillla's AMO site suggests that additional action is necessary.

A Mozilla spokesperson wasn't immediately available for comment.

Master Filer was downloaded approximately 600 times between September 2009 and January 2010. Version 4.0 of Sothink Web Video Downloader was downloaded approximately 4,000 times between February 2008 and May 2008. AMO's blog post says that versions of Sothink greater than 4.0 are not infected. The latest version, 5.7, is not available through AMO's site, but can be found at Sothink's Web site.

In July, Mozilla launched a program to help add-on developers solicit contributions for the add-ons they post on the AMO site.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2011-4403
Published: 2015-04-24
Multiple cross-site request forgery (CSRF) vulnerabilities in Zen Cart 1.3.9h allow remote attackers to hijack the authentication of administrators for requests that (1) delete a product via a delete_product_confirm action to product.php or (2) disable a product via a setflag action to categories.ph...

CVE-2012-2930
Published: 2015-04-24
Multiple cross-site request forgery (CSRF) vulnerabilities in TinyWebGallery (TWG) before 1.8.8 allow remote attackers to hijack the authentication of administrators for requests that (1) add a user via an adduser action to admin/index.php or (2) conduct static PHP code injection attacks in .htusers...

CVE-2012-2932
Published: 2015-04-24
Multiple cross-site scripting (XSS) vulnerabilities in TinyWebGallery (TWG) before 1.8.8 allow remote attackers to inject arbitrary web script or HTML via the (1) selitems[] parameter in a copy, (2) chmod, or (3) arch action to admin/index.php or (4) searchitem parameter in a search action to admin/...

CVE-2012-5451
Published: 2015-04-24
Multiple stack-based buffer overflows in HttpUtils.dll in TVMOBiLi before 2.1.0.3974 allow remote attackers to cause a denial of service (tvMobiliService service crash) via a long string in a (1) GET or (2) HEAD request to TCP port 30888.

CVE-2015-0297
Published: 2015-04-24
Red Hat JBoss Operations Network 3.3.1 does not properly restrict access to certain APIs, which allows remote attackers to execute arbitrary Java methos via the (1) ServerInvokerServlet or (2) SchedulerService or (3) cause a denial of service (disk consumption) via the ContentManager.

Dark Reading Radio
Archived Dark Reading Radio
Join security and risk expert John Pironti and Dark Reading Editor-in-Chief Tim Wilson for a live online discussion of the sea-changing shift in security strategy and the many ways it is affecting IT and business.