OSSA-2018-001: Raw underlying encrypted volume access¶
April 20, 2018
Nova: >=15.0.0 <=15.1.0, >=16.0.0 <=16.1.1
Lee Yarwood (Red Hat) reported a vulnerability in Nova encrypted volumes handling. By detaching and reattaching an encrypted volume an attacker may access the underlying raw volume and corrupt the LUKS header resuling in a denial of service attack on the compute host. All Nova setups supporting encrypted volumes are affected.
Lee Yarwood from Red Hat (CVE-2017-18191)
Pike and Ocata patches disable encrypted volume swapping, this feature is now only supported in Nova version >= 17.0.0.