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Know How... 112: Bash Bug, GPU Upgrade, and Android Wear

2,801 views · Published 25 September 2014 · 54:15 · Indexed 12 November 2026

Channel: Hands-On AI · 2014 · Howto & Style

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Bash exploit allows an attacker to take complete control of a computer, upgrading your Video Card, VLAN's on a personal network, SSD Media Center, and make a custom watch face for your Android Wear Device. 
Bash, Bash, Bash!
* A new bug has been discovered in Bash that allows an attacker to take complete control of a computer running any UNIX-based operating system
-- That includes all flavors of Linux as well as Apple's OSX.
** The National Vulnerability Database gave the exploit a "10 out of 10"
** While the Heatbleed bug allowed attackers to spy on your traffic. This bug lets them attack your computer.
What is Bash
* Bash is a command line shell that was released in 1989
* It replaced the "Bourne Shell" -- and therefore it was dubbed the "Bourne-Again Shell" or BASH)
* It allows users to issue commands to the Operating system through a command line.
What is the vulnerability?
* Some researchers at Red Hat figured out that you could add a few extra lines to a bash command and have it execute scripts over the Internet.
* Essentially... this allows a remote attack to have COMPLETE control over your OS.
Why is it Bad?
* Heartbleed affected about 600,000 websites
* The Bash Bug can affect HUNDREDS OF MILLIONS OF COMPUTERS AND DEVICES
* Linux is baked into many smart devices (which means they're most likely not going to be patched)
-- Light Bulbs
-- Cameras
-- Automatic lighting/irrigation systems
-- Routers
Padre's Network
* Enterasys D2 Switch (Core) 
* Radius Authentication Server
* HP Intellijacks (Edge)
* When new devices connect, they get an address and access to the gateway. They're put on their own VLAN in the "untrusted" subnet, so they can't see any other devices.
* Once they authenticate, they're put on the "Trusted VLANS" -- They can now see basic network resources. (Internet Gateway // Media Server // Printers)
* When they want to access another network resource (Other computers, admin tools, security, secure storage) they hit an access list.
-- If that device has permission to access that device (which is on its own VLAN), a new VLAN is created that encompases both devices. That VLAN is deleted when communications are now longer requried between devices.
Android Wear
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