Stack smash protection

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Topic: Stack smash protection

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	Debian SbD: Stack Smash Protection
		Stack Smash Protection, or ProPolice, is a patch to gcc which allows the -fstack-protector switch to be used to protect stack-based buffers.
		Protecting from Stack Smashing Attacks is an article written by the creator(s) of ProPolice about Stack Smash Protection.
		In this scenario, the -fno-stack-protector switch must be used to build a source file without SSP.
	d-sbd.alioth.debian.org /www?page=ssp (708 words)

	OpenBSD: Stack-Smashing Protection
		It is now simply referred to as the "stack-smashing protector", being a highly portable GCC extension that 1) reorders variables to prevent pointer corruption, and 2) inserts protection code into an application at compilation time to detect buffer overflows, preventing such bugs from being exploited.
		The buffer overflow protection portion of Hiroaki's GCC extension is based on StackGuard.
		And it goes further: we've got stack smash protected install floppies!
	kerneltrap.org /node/516 (1367 words)

	smashing - OneLook Dictionary Search
		Phrases that include smashing: stack smashing, plate smashing, stack smashing protection, stack smashing protector, the smashing pumkins
		Words similar to smashing: bang-up, bully, cool, corking, cracking, dandy, great, groovy, keen, neat, nifty, peachy, shattering, slap-up, smash, smashingly, swell, not bad, more...
		Smashing : Online Plain Text English Dictionary [home, info]
	www.onelook.com /?w=smashing (237 words)

	Protection
		Stack smash protection A stack smash attack is a type of attack based on a computer security vulnerabilities.
		Protection, Kansas Protection is a city located in 2000 census, the city had a total population of 558.
		Port Protection, Alaska Port Protection is a town located in 2000 census, the population of the town is 63.
	www.brainyencyclopedia.com /topics/protection.html (237 words)

	User:Bluefoxicy - Wikipedia, the free encyclopedia
		I'm a PaX, Stack smash protection, and a Position independent executable base user, and believe that these are all appropriate and should be used as the basis for all desktop-aimed Linux distributions ; enterprise servers must make a design decision as to whether or not to use these.
		I use Linux, specifically Gentoo Linux, with a PaX enhanced kernel and Stack Smash Protected and Position Independent executable base.
		I have measured [1] the overhead of Position independent code on both x86 and amd64 with gcc compiler optimizations (-O3).
	en.wikipedia.org /wiki/User:Bluefoxicy (237 words)

	ipedia.com: Buffer overflow Article
		In ProPolice patched versions of gcc, the -fstack-protector and -fstack-protector-all switches for gcc compile code to include a few references to __guard@glibc and __stack_smash_handler@glibc around stack based buffers.
		Systems such as StackGuard and ProPolice provide protection against the most common techniques for exploiting buffer overflows by checking that the stack has not been altered when a function returns.
		When a stack smash is triggered, SSP will detect it, and then exit the program with a segmentation fault.
	www.ipedia.com /buffer_overflow.html (1071 words)

	Talk:Computer security - Wikipedia, the free encyclopedia
		Check out also PaX, NX, buffer overflow, Stack smash protection, and a few others that you should be seeing in this article.
		On a side note, W xor X needs to be written as well for OpenBSD W^X; and we need a proper Mandatory access control article.
	www.assault-weapons.com /wiki/Talk:Computer_security (3206 words)

	SELinux Mailing List: by thread
		On the other hand, most of the 'Trusted' systems I've been exposed to (including systems evaluated at the "B" MLS level) are indeed providing excellent protection of data, however might be fully compromised by a stack-smash of a priveleged process.
		Of course for any application, one must judge the deployed system in its intended configuration (e.g., a certification and accreditation in U.S. government lingo) to determine whether the OS that you trust incorporates adequate assurances to be trustworthy.
		If one objective of a 'Trusted' OS is that the user gains some breathing space in terms of choosing when to apply security patches then SEL and other linux/BSD security implementations are making significant strides.
	www.nsa.gov /selinux/list-archive/0305/thread_body49.cfm (3206 words)

	Stack smash protection
		If the buffer was longer than 14 bytes, an attacker could inject executable code ( shellcode) or return to existing code ( ret2libc).
		Note that without the canary, the program would return to whatever those last four bytes point to, altering the execution flow.
	encyclopedia.codeboy.net /wikipedia/s/st/stack_smash_protection.html (3206 words)

	Stack smash protection
		By overwriting RETA, the function can be made to execute other code, either existing functions (ret2libc) or code written into the stack during the overflow, either before or after RETA.
		By overwriting b, the pointer can be made to address any position in memory, causing a read from or a write to any arbitrary address.
		In a nutshell, mistaken handling of c and d, such as the unbounded strcpy () calls above, may allow an attacker to control a program if he is able to influence the values assigned to c and d directly.
	pedia.newsfilter.co.uk /wikipedia/s/st/stack_smash_protection.html (3206 words)

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