Permissions, Privileges, and Access Controls in Openstack products - CVE-2023-2088
Published: May 11, 2023
Vulnerability identifier: #VU76039
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-2088
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Openstack
Affected software:
Cinder
Glance_store
Os-brick
Openstack Nova
Cinder
Glance_store
Os-brick
Openstack Nova
Detailed vulnerability description
The vulnerability allows an attacker to gain unauthorized access to a volume.
The vulnerability exists due to the way OpenStack handles situations with volume deletions. A regular user can create an instance with a volume, and then delete the volume attachment directly in Cinder, which neglects to notify Nova.
The compute node SCSI plumbing (over iSCSI/FC) will continue trying to connect to the original host/port/LUN, not knowing the attachment has been deleted. If a subsequent volume attachment re-uses the host/port/LUN for a different instance and volume, the original instance will gain access to it once the SCSI plumbing reconnects.
Only deployments with iSCSI or FC volumes are affected.
How to mitigate CVE-2023-2088
Install updates from vendor's website.