CVE-2017-17051
By repeatedly rebuilding an instance with new images, an authenticated user may consume untracked resources on a hypervisor host leading to a denial of service, aka doubled resource allocations.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.99%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in the default FilterScheduler in OpenStack Nova 16.0.3. By repeatedly rebuilding an instance with new images, an authenticated user may consume untracked resources on a hypervisor host leading to a denial of service, aka doubled resource allocations. This regression was introduced with the fix for OSSA-2017-005 (CVE-2017-16239); however, only Nova stable/pike or later deployments with that fix applied and relying on the default FilterScheduler are affected.
- CVSS 3.0
- 8.6 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- EPSS
- 1.99% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- openstack/nova
- Source
- cve@mitre.org
References
- http://www.securityfocus.com/bid/102102Third Party Advisory, VDB Entry
- https://launchpad.net/bugs/1732976Issue Tracking, Third Party Advisory
- https://review.openstack.org/521662Vendor Advisory
- https://review.openstack.org/523214Vendor Advisory
- https://security.openstack.org/ossa/OSSA-2017-006.htmlVendor Advisory
- http://www.securityfocus.com/bid/102102Third Party Advisory, VDB Entry
- https://launchpad.net/bugs/1732976Issue Tracking, Third Party Advisory
- https://review.openstack.org/521662Vendor Advisory
- https://review.openstack.org/523214Vendor Advisory
- https://security.openstack.org/ossa/OSSA-2017-006.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.