[libvirt-users] libvirt.so is not safe to use from setuid programs
Daniel P. Berrange
berrange at redhat.com
Thu Feb 4 14:03:16 UTC 2016
On Thu, Feb 04, 2016 at 01:42:12PM +0000, Jean-Pierre Ribeauville wrote:
> Hi,
>
>
> When trying to connect the HyperVisor from a binary
> having setuid bit set , then I got following error:
>
> Unable to perform virConnectOpenReadOnly function error(internal
> error: libvirt.so is not safe to use from setuid programs)
>
> My test software config is the following :
>
>
> -rwsr-xr-x. 1 root root 3374956 Feb 4 13:45 test
>
> As this test software needs S bit to be able to access O.S.
> metrics counters , how may I use it to retrieve KVM metrics
> counters ?
You should re-write your app so that it does not need to have
the setuid be present for everything it does. Create a tiny
self-contained executable for *only* accessing OS metrics
counters, so that bit can run setuid, and the main bulk of
your app can run unprivileged.
Regards,
Daniel
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