As worries about the Java 7 Update 10 vulnerabilities continue to escalate, Mozilla has addressed the issue in reference to how this concerns Firefox.
Michael Coates, director of Security Assurance at Mozilla, wrote in a blog post on Friday afternoon that Firefox users could be vulnerable if they have the current version of the Java plugin installed on their browsers.
At this point in time, Oracle (the owner of Java) hasn't released a security update or patch to remedy the issues.
Coates explained that in fairly clear terms what could happen here:
An attacker could exploit this vulnerability to execute malicious software on a victim’s machine. This vulnerability is being actively used in attacks and the malicious exploit code is also available in common exploit kits.
For Firefox users, Coates touted the "Click to Play" security feature, which is basically used to halt loading plugins before they're clicked -- or block them altogether.
In reference to Java, this means the plugin won't load until the user clicks on the permission pop-up to do so. Thus, until a patch is rolled out, don't give permission.
Coates added that Firefox users with older versions of Java should be already protected by existing plugin blocking or Click To Play defenses.