Date: Tue, 26 May 2015 23:20:53 -0700 From: Alfred Perlstein <alfred@freebsd.org> To: "K. Macy" <kmacy@freebsd.org>, Bryan Drewery <bdrewery@freebsd.org> Cc: Shawn Webb <shawn.webb@hardenedbsd.org>, Pedro Giffuni <pfg@freebsd.org>, Oliver Pinter <oliver.pinter@hardenedbsd.org>, freebsd-arch@freebsd.org Subject: Re: ASLR work into -HEAD ? Message-ID: <55656245.3000205@freebsd.org> In-Reply-To: <CAHM0Q_O4bCTaVi5HvKohrcYE--Yw8Yoo-0wEp1ScnF=qLiiQiQ@mail.gmail.com> References: <555CADB6.202@FreeBSD.org> <CAPQ4fftbUUSMHYXjOD-yO0ZzxdKwXzd5LA5AycrEyKMT3o63xw@mail.gmail.com> <555CC369.1030206@FreeBSD.org> <555FBE83.6080103@FreeBSD.org> <CAHM0Q_O4bCTaVi5HvKohrcYE--Yw8Yoo-0wEp1ScnF=qLiiQiQ@mail.gmail.com>
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On 5/24/15 1:43 PM, K. Macy wrote: > On May 22, 2015 4:41 PM, "Bryan Drewery" <bdrewery@freebsd.org> wrote: >> On 5/20/2015 12:24 PM, Pedro Giffuni wrote: >>> My claim is that the majority of "professional" breachers and >>> governments already have ASLR workarounds pre-coded and ready >>> to launch. Finding an exploit is more difficult than beating >>> ASLR so they are not going to hint everyone that they have >>> an exploit until they can take all the linux/windows/MacOSX >>> at the same time. >>> >>> The cost for the NSA and/or anonymous to step on >>> ASLR is zero. > Correct. But who are we really protecting against? If it's the NSA only air > gap will really do. In reality it's just a matter of making the cost of > circumventing protections exceed the value of the data or items being > protected. Locking one's doors and windows doesn't make one's house > impenetrable by any stretch, but it does deter opportunistic passerby. > > Protecting against state overreach is a political matter and shouldn't > factor into whether to invest in deterring lesser malfeasors. > > I'm sorry, but Bryan has it right. The political discussion is a side show. > +1, also having a line item is good. Not having ASLR just makes FreeBSD look derp. DragonFly BSD has an implementation of ASLR based upon OpenBSD's model, added in 2010.[ Microsoft's Windows Vista (released January 2007) and later have ASLR enabled In 2003, OpenBSD became the first mainstream operating system to support partial ASLR In Mac OS X Leopard 10.5 (released October 2007), Apple introduced randomization for system libraries Linux has enabled a weak form of ASLR by default since kernel version 2.6.12 (released June 2005). So basically 1 more week and we can be 10 years behind Linux. :) w00t. -Alfred
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