Open Stack

Per Tristan's suggestion, the VMT will treat this as a security
hardening opportunity, no advisory needed.

** Changed in: ossa
       Status: Incomplete => Won't Fix

** Information type changed from Public Security to Public

** Tags added: security

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https://bugs.launchpad.net/bugs/1837339

Title:
  CIDR's of the form 12.34.56.78/0 should be an error

Status in OpenStack Dashboard (Horizon):
  Confirmed
Status in neutron:
  New
Status in OpenStack Security Advisory:
  Won't Fix
Status in OpenStack Security Notes:
  New

Bug description:
  The problem is that some users do not understand how CIDRs work, and
  incorrectly use /0 when they are trying to specify a single IP or a
  subnet in an Access Rule.  Unfortunately 12.34.56.78/0 means the same
  thing as 0.0.0.0/0.

  The proposed fix is to insist that /0 only be used with 0.0.0.0/0 and
  the IPv6 equivalent ::/0 when entering or updating Access Rule CIDRs
  in via the dashboard.

  I am labeling this as a security vulnerability since it leads to naive
  users creating instances with ports open to the world when they didn't
  intend to do that.

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