Date: Wed, 19 Nov 2003 21:16:37 +0000 (GMT) From: "E.B. Dreger" <eddy+public+spam@noc.everquick.net> To: Scott Long <scottl@freebsd.org> Cc: "M. Warner Losh" <imp@bsdimp.com> Subject: Re: Unfortunate dynamic linking for everything Message-ID: <Pine.LNX.4.44.0311192110020.3227-100000@a.mx.ict1.everquick.net> In-Reply-To: <20031118164905.R35009@pooker.samsco.home>
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SL> Date: Tue, 18 Nov 2003 17:06:06 -0700 (MST) SL> From: Scott Long SL> 3. Binary security updates: there is a lot of interest in providing a SL> binary update mechanism for doing security updates. Having a dynamic SL> root means that vulnerable libraries can be updated without having to SL> update all of the static binaries that might use them. Although this doesn't help the upgrade process, what if one symbol (such as function name + CVS tag) were exported per function? One could check for a vulnerability by strings | grep funcname | inspect CVS tag. A more elegant approach would be to store such versioning in another segment and have a tool that understands the data, a la debugger symbols. On a different note: + Some of us have had a few bad experiences with glibc (granted, it's glibc) upgrades when the shell, cp, ls, et cetera are dynamically linked. + I put the shell of choice and all of SSH's guts on the root partition... if /usr gets clobbered, I still want to be able to boot and log in remotely. If / gets clobbered, I have bigger problems. :-) Eddy -- Brotsman & Dreger, Inc. - EverQuick Internet Division Bandwidth, consulting, e-commerce, hosting, and network building Phone: +1 785 865 5885 Lawrence and [inter]national Phone: +1 316 794 8922 Wichita _________________________________________________________________ DO NOT send mail to the following addresses : blacklist@brics.com -or- alfra@intc.net -or- curbjmp@intc.net Sending mail to spambait addresses is a great way to get blocked.
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