June 17, 2021

Concern grows as zero day Java exploit spreads

(LiveHacking.Com) – Concerns about the impact (even devastation) of the recently discovered zero day Java exploit are starting to grow as the exploit has been added to the infamous Blackhole exploit kit. It has also been discovered that the attacks, which have now become global with cases recorded in the United States, Russia, Belarus and Germany,  are actually using two unpatched vulnerabilities in Java 7 – not one, as was originally thought. Kurt Baumgartner, a senior security researcher at security firm Kaspersky Lab, wrote in a blog post that the infections are becoming more common and have spread out from their initial starting point in China.

Oracle have yet to comment on the vulnerability and since every major browser is susceptible to the attack, US-CERT has released Vulnerability Note VU#636312 which advises users to disable the Java browser plugin.

  • To disable the Java web plug-in in Safari, open Safari > Preferences, click “Security” and uncheck “Enable Java”.
  • To disable Java applets in Firefox, click on the Firefox button and then click Add-ons., select the Plugins panel, click on the Java (TM) Platform plugin and then click on the Disable button.
  • For Chrome,  type chrome://plugins/ into the address bar, scroll down to Java and click Disable.
  • Disabling Java in Internet Explorer isn’t easy, detailed instructions can be found here, here and here.

Disclosure concerns
There have also been some concerns about how this exploit was disclosed. It appears that some bloggers irresponsibly reported the vulnerability by including links to known sites serving the attack. “Would you encourage folks to walk down a mugger’s dark alley with no protection or would you work to communicate the muggers’ whereabouts to the right folks and work on lighting the alley or giving better directions?” wrote Kurt Baumgartner from Kaspersky.

Also since the exploit was added to the Metasploit penetration testing framework it became available to every would-be hacker. The counter argument is that such full disclosure will force Oracle to deliver an out-of-band patch, which in the past it has failed to do.  The company’s next scheduled Java security updates is on October 16 2012.


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