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Date: Tue, 10 Jul 2012 16:11:12 +0200
From: Sebastian Krahmer <krahmer@...e.de>
To: oss-security@...ts.openwall.com
Subject: Re: libdbus hardening


I am fine with either solution and would prefer upstream patches
anyway, but it turned out in past that nobody from upstream
is willing to add such patches.
I tried a year ago with openssl and AFAIK its still suffering
(at least I never heared back).

If you compile your openssh '--with-ssl-engine' you have
an easy root exploit (given that ssh-keysign is mode 04755
such as on Debian) via OPENSSL_config().

If you ask me, thats quite poor for a framework that wants to
add security to the system.
So, I do not have any problems adding our own patch sets rather
than waiting for another year.

Another lib that should receive a patch is libudev.

Sebastian


On Tue, Jul 10, 2012 at 05:43:36PM +0400, Solar Designer wrote:
> On Tue, Jul 10, 2012 at 03:13:55PM +0200, Florian Weimer wrote:
> > Perhaps we can put a getenv_secure() into libc, which will perform all 
> > the appropriate checks (including future checks we do not know about 
> > yet)?  Duplicating the code in many libraries does not seem prudent.
> 
> We already have __secure_getenv() in glibc, which I think is what
> libraries like this should be using on systems with glibc.
> 
> Apparently, it was even in LSB until 1.3 inclusive, but was since
> dropped from there?
> 
> Alexander

-- 

~ perl self.pl
~ $_='print"\$_=\47$_\47;eval"';eval
~ krahmer@...e.de - SuSE Security Team

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