What is Bash Shellshock vulnerability?

In layman’s terms, Shellshock is a vulnerability that allows systems containing a vulnerable version of Bash to be exploited to execute commands with higher privileges. This allows attackers to potentially take over that system. Threat actors exploiting the vulnerability can issue commands remotely on the target host.

What caused the Shellshock bug?

The bug Chazelas discovered caused Bash to unintentionally execute commands when the commands are concatenated to the end of function definitions stored in the values of environment variables.

Is shellshock a virus?

Shellshock is a serious security bug in Bash, a “shell” commonly used in computers running Linux, UNIX and OS X. Shellshock could allow an attacker to execute malicious commands across the Internet on remote computers. Many web-facing servers run Linux and use Bash, so it is a widespread problem that needs fixing.

What is the most common method to exploit the Bash bug or Shellshock vulnerability?

The correct answer is CGI (Common Gateway Interface). “The most common being web servers using CGI environment.”

What was unique about the bash bug?

The flaw allows an attacker to remotely attach a malicious executable to a variable that is executed when Bash is invoked. In most of the examples on the Internet right now, attackers are remotely attacking web servers hosting CGI scripts that have been written in bash.

What is shell shock in cybersecurity?

Shellshock is the common name for a coding vulnerability found in the Bash shell user interface that affects Unix-based operating systems, including Linux and Mac OS X, and allows attackers to remotely gain complete control of a system.

What is Bash console?

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. First released in 1989, it has been used as the default login shell for most Linux distributions. Bash can also read and execute commands from a file, called a shell script.

Is shellshock a PTSD?

The term shell shock is still used by the United States’ Department of Veterans Affairs to describe certain parts of PTSD, but mostly it has entered into memory, and it is often identified as the signature injury of the War.

What is the definition of shellshock?

Definition of shell shock : post-traumatic stress disorder occurring under wartime conditions (as combat) that cause intense stress : battle fatigue, combat fatigue In the receiving ward he found a patient shivering on his bunk with a diagnosis—in this case accurate—of severe shell shock.—

How does shellshock affect a computer system?

This vulnerability (Shellshock) affects this “bash” and allows the “bad guys” to get in – into your systems. It’s simple – the programming of the bash shell is flawed in handling the “environmental variable” as a result of which a computer can be tricked to execute scripts that a hacker wants.

How does Bash shell work?

Bash reads input from the terminal when interactive, and from the script file specified as an argument otherwise. When interactive, bash allows the user to edit command lines as they are typed in, using familiar key sequences and editing commands similar to the Unix emacs and vi editors.