Re: Debian 4.0 and mmap_min_addr null pointer dereference flaw
On Wed, Nov 04, 2009 at 09:05:20AM -0800, john wrote:
> I see that there is another null pointer dereference flaw being talked about.
> http://www.theregister.co.uk/2009/11/03/linux_kernel_vulnerability/
>
> It looks like we can take step in Debian 5.0 to mitigate this threat by setting
> echvm.mmap_min_addr = 4096
>
> per http://wiki.debian.org/mmap_min_addr
>
> I am running some servers running Debian 4.0. I doesn't look like
> there is a /etc/sysctl.d/mmap_min_addr.conf to edit. Where are these
> values stored
> under Debian 4.0.
>
> What is the right way to proceed? Should I be looking at upgrading my servers?
The mmap_min_addr tuneabout was not introduced until after 2.6.18,
which is the default etch kernel. I am using the 'etchnhalf' kernel
(linux-image-2.6.24-etchnhalf*) on an etch machine, partly since it
offers this protection.
--
Dominic Hargreaves | http://www.larted.org.uk/~dom/
PGP key 5178E2A5 from the.earth.li (keyserver,web,email)
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