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In the past, malicious browser extensions have been used to carry out click fraud by inserting rogue advertisements into websites or hijacking search queries.For example, security researcher Zoltan Balazs developed a browser extension that is capable of modifying webpages, downloading and executing files, hijacking accounts and bypassing two-factor authentication.Disabling the running of plug-ins that are outdated is recommended and will help ensure that enterprise patching strategies include browser extensions and plug-ins.Organizations may consider implementing an audit tool, such as the Secunia CSI 7.0 or Qualys Browser Check, which are able to scan common browser plug-ins and determine whether they need updating.
Apple Safari extensions submitted to the Apple Extension gallery are actually hosted at an external location, while Mozilla Firefox allows the installation of extensions from third-party websites.
Browsers aim to provide some user control over extension permissions, but often suffer from coarse-grained access controls and insufficient user awareness of the dangers of granting permissions to various add-ons.
Never assume that an add-on is safe just because it's hosted on one of the official extension galleries either.
When reviewing which extensions to allow in your enterprise, always keep in mind the type of resources the extension can access and where it sends data.
Although Google Chrome extensions are given a risk rating by the company, and just recently Google announced it would tighten restrictions so that Windows-based extensions can only be added via the Chrome Web store, administrators should complete their own assessment.
These files do not contain the required files needed by a SEPM or SAV Parent to additionally update any clients attached.