computoman

So many have blogged or left a message on the web at such places as Google+, this is probably old news. :(){:|:& };: env x='() { :;}; echo vulnerable' bash -c "echo this is a test envX='(){(a)=>\'bash -c echo "echo date"; cat echo --------------------------------------------------------------------------- Per ArsTechnica: Security vulnerability in the GNU Bourne Again Shell (Bash), the command-line shell used in many Linux and Unix operating systems, could leave systems running those operating systems open to exploitation by specially crafted attacks. “This issue is especially dangerous as there are many possible ways Bash can be called by an application,” a Red Hat security advisory warned. The bug , discovered by Stephane Schazelas , is related to how Bash processes environmental variables passed by the operating system or by a program calling a Bash-based script. If Bash has been configured as the default system shell, it...

Message of the day, Message of the day if the screen you see when you log into the command line. Usually if s short and mundane, You may want to jazz it up a little bit with some text graphics.Some of the settings for your computer are int he /etc directory. Message of the day or motd usually resides in this directory. Now if you add your message  or graphic to the regular motd file, it will usually get wiped out. What you can do is add your messages ad or graphics into a file call /etc/motd.tail. Then when you log in you will see your message. You will need to reboot to see the message.You can also edit /etc/issue that is used by mgetty for when you log into a serial port. (rs232).

Preface:  One thing I forgot to mention in an earlier article is that you can also block sites from being accessed with the hosts file.  127.0.0.1 is the address for your local computer. So when an address of say www.facebook.com is associated with the local host and then accessed, it will bring you back to your local machine. Good way to keep people off unwanted sites. In fact, you can down load a list of sites that are generally not good for your system at: (you will have to modify it for your needs). http://winhelp2002.mvps.org/hosts.txt The main story:  According to http://www.h-online.com/security/news/item/Microsoft-s-security-software-modifies-HOSTS-file-1670927.html/ The biggest gripe is that if you have www.facebook.com and certain other sitess blocked, Microsoft will modify your hosts file to re-enable it. Here is an example before modification. What bothers a lot of people is that what gives Microsoft the right to modify such ...