bugtraq - Re: Buffer overflow prevention

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Message-ID: <3F3BEC6C.6010007@depraved.org>
Date: Thu, 14 Aug 2003 16:09:16 -0400
From: "Matt D. Harris" <vesper@...raved.org>
To: undisclosed-recipients:;
Subject: Re: Buffer overflow prevention

Theo de Raadt wrote:
> I believe the best protection (at this time) is to combine ProPolice with
> a W^X technology.

Solaris 2.6 and above also support a kernel variable which can be set 
via /etc/system called "noexec_user_stack", which can make the stack for 
userland processes non-executable by default.  Note that this behavior 
is the default for 64-bit binaries in Solaris 7, 8, and 9, and this 
kernel variable forces the behavior for 32-bit binaries.  I run all 
sorts of odd software and have never had an issue with having this 
always turned on for all of my systems.