Shellshock is recognized as CVE-2014-6271, which flaw that lurks users operating systems Mac OS X and Linux directly, and that in turn would be much more serious than Heartbleed released some weeks ago.
The consultants rated of maximum danger the security flaw that was recently released, because it allows you to control other equipment, as well as steal information out very easily, so it will be a serious problem for those who are used to store data important, such as bank account numbers, credit cards and passwords for different websites.
It was the Early Warning Centre for Computer Emergency of the United States who failed to detect this security flaw, which placed as paramount to highlight and even offers an immediate solution, which is to install a patch to preserve certain computers that found vulnerable to this type of security flaws.
Some of the major Linux distributions have already released patches to fix the bug where you can highlight the following.
Red Hat Enterprise Linux (versions 4 through 7), including versions of Fedora currently supported.
CentOS (version 5 to 7).
Ubuntu LTS in all versions from 10.04.
All the above companies have released an effective patch against shellshock. Users apply patches to routers and other networked devices as they become available from manufacturers is recommended. Users of Mac OS X Apple should be careful, because the operating system that brings the factory team, has a vulnerable version of Bash. Mac users should apply the patches for OS X as they become available. However, Red Hat, publisher of the namesake Linux distribution, encourages users to quickly install the security patch.