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[Bug 948520] Re: nova-rootwrap does a poor job of validating parameters

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Sean McGinnis <sean_mcginnis@xxxxxxxx>
Date: Sun, 18 Oct 2015 04:04:52 -0000
Reply-to: Bug 948520 <948520@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: cinder
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/948520

Title:
  nova-rootwrap does a poor job of validating parameters

Status in Cinder:
  Won't Fix
Status in OpenStack Compute (nova):
  Invalid
Status in oslo-incubator:
  Invalid

Bug description:
  Although nova-rootwrap does limit which commands can be run as root,
  it doesn't validate the parameters passed through.

  For example,  '/bin/dd' is allowed by by 'nova/rootwrap/compute.py'
  which can be exploited in the following fashion:

  'sudo nova-rootwrap dd if=/tmp/mypw of=/etc/passwd'

  This means that if someone can get nova user access they can gain root
  access.

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