** Summary changed:
- nova rebuild ignores all image properties and scheduler filters
(CVE-2017-16239)
+ [OSSA-2017-005] nova rebuild ignores all image properties and scheduler
filters (CVE-2017-16239)
** Description changed:
- This issue is being treated as a potential security risk under embargo.
- Please do not make any public mention of embargoed (private) security
- vulnerabilities before their coordinated publication by the OpenStack
- Vulnerability Management Team in the form of an official OpenStack
- Security Advisory. This includes discussion of the bug or associated
- fixes in public forums such as mailing lists, code review systems and
- bug trackers. Please also avoid private disclosure to other individuals
- not already approved for access to this information, and provide this
- same reminder to those who are made aware of the issue prior to
- publication. All discussion should remain confined to this private bug
- report, and any proposed fixes should be added to the bug as
- attachments.
-
Big picture: If some image has some restriction on aggregates or hosts
it can be run on, tenant may use nova rebuild command to circumvent
those restrictions. Main issue is with ImagePropertiesFilter, but it may
cause issues with combination of flavor/image (for example allows to run
license restricted OS (Windows) on host which has no such license, or
rebuild instance with cheap flavor with image which is restricted only
for high-priced flavors).
I don't know if this is a security bug or not, if you would find it non-
security issue, please remove the security flag.
Steps to reproduce:
1. Set up nova with ImagePropertiesFilter or IsolatedHostsFilter active.
They should allows to run 'image1' only on 'host1', but never on 'host2'.
2. Boot instance with some other (non-restricted) image on 'host2'.
3. Use nova rebuild INSTANCE image1
Expected result:
nova rejects rebuild because given image ('image1') may not run on
'host2'.
Actual result:
nova happily rebuild instance with image1 on host2, violating
restrictions.
Checked affected version: mitaka.
I believe, due to the way 'rebuild' command is working, newton and
master are affected too.
** Information type changed from Private Security to Public Security
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https://bugs.launchpad.net/bugs/1664931
Title:
[OSSA-2017-005] nova rebuild ignores all image properties and
scheduler filters (CVE-2017-16239)
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