Russel Bryant (rbryant) reports:
Title: DoS by allocating all Fixed IPs
Reporter: Vish Ishaya (Nebula)
Affects: All versions
Vish Ishaya reported a vulnerability in Nova where there is no quota
for Fixed IPs. Previously the instance quota acted as a proxy for
a Fixed IP quota, but if your configuration allows an instance to
consume more than one Fixed IP via an extension such as multinic
then this is no longer true. Running out of Fixed IPs would result in
not being able to spawn new instances.
See attached patches. Unless a flaw is discovered in them, these
patches will be merged to Nova master (Grizzly), stable/folsom,
and stable/essex branches on the public disclosure date.
Created attachment 707322 [details]
Created attachment 707323 [details]
Created attachment 707324 [details]
Red Hat would like to thank the OpenStack project for reporting this issue. Upstream acknowledges Vish Ishaya (Nebula) as the original reporter.
This issue has been addressed in following products:
OpenStack Folsom for RHEL 6
Via RHSA-2013:0709 https://rhn.redhat.com/errata/RHSA-2013-0709.html