Vulnerabilities / Threats

2/5/2010
06:08 PM
Connect Directly
Google+
LinkedIn
Twitter
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
Comments
Newest First  |  Oldest First  |  Threaded View
Weaponizing IPv6 to Bypass IPv4 Security
John Anderson, Principal Security Consultant, Trustwave Spiderlabs,  6/12/2018
'Shift Left' & the Connected Car
Rohit Sethi, COO of Security Compass,  6/12/2018
Why CISOs Need a Security Reality Check
Joel Fulton, Chief Information Security Officer for Splunk,  6/13/2018
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-10617
PUBLISHED: 2018-06-18
Delta Electronics Delta Industrial Automation DOPSoft version 4.00.04 and prior utilizes a fixed-length heap buffer where a value larger than the buffer can be read from a .dpa file into the buffer, causing the buffer to be overwritten. This may allow remote code execution or cause the application t...
CVE-2018-10621
PUBLISHED: 2018-06-18
Delta Electronics Delta Industrial Automation DOPSoft version 4.00.04 and prior utilizes a fixed-length stack buffer where a value larger than the buffer can be read from a .dpa file into the buffer, causing the buffer to be overwritten. This may allow remote code execution or cause the application ...
CVE-2018-10623
PUBLISHED: 2018-06-18
Delta Electronics Delta Industrial Automation DOPSoft version 4.00.04 and prior performs read operations on a memory buffer where the position can be determined by a value read from a .dpa file. This may cause improper restriction of operations within the bounds of the memory buffer, allow remote co...
CVE-2015-4664
PUBLISHED: 2018-06-18
An improper input validation vulnerability in CA Privileged Access Manager 2.4.4.4 and earlier allows remote attackers to execute arbitrary commands.
CVE-2018-9021
PUBLISHED: 2018-06-18
An authentication bypass vulnerability in CA Privileged Access Manager 2.8.2 and earlier allows remote attackers to execute arbitrary commands with specially crafted requests.