[libvirt] [PATCH] move ebiptables script out of /tmp

Stefan Berger stefanb at linux.vnet.ibm.com
Wed Jun 16 19:11:17 UTC 2010


On 06/16/2010 02:54 PM, Jamie Strandboge wrote:
> Hi,
>
> I noticed today that ebiptablesWriteToTempFile() creates a temporary
> file in /tmp that is later executed. It uses mkstemp() and therefore is
> safe from symlinks attacks, however, there is not really any reason that
> I can see why it is using /tmp instead of somewhere
> like /var/lib/libvirt. If libvirtd is confined under a MAC which allows
> execution of /tmp/virtd* and a vulnerability is found in libvirtd,
> the /tmp path leaves an opportunity for a local non-root attacker to
> write a script in /tmp and then subvert libvirt to execute that script.
>    
I don't mind the move of the temporary file, but I'd like to understand 
how would someone subvert libvirt to run an arbitrary script?

    Stefan




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