CVE-2017-18191: High severity openstack compute (nova) vulnerability
An issue was discovered in OpenStack Nova 15.x through 15.1.0 and 16.x through 16.1.1. By detaching and reattaching an encrypted volume, an attacker may access the underlying raw volume and corrupt the LUKS header, resulting in a denial of service attack on the compute host. (The same code error also results in data loss, but that is not a vulnerability because the user loses their own data.) All Nova setups supporting encrypted volumes are affected.
Other sources
OpenStack Nova 15.x through 15.1.0 and 16.x through 16.0.4 has a vulnerability in the handling of encrypted volumes. By detaching and reattaching an encrypted volume, an attacker may access the underlying raw volume and corrupt the LUKS header, resulting in a denial of service attack on the compute host.
All Nova setups supporting encrypted volumes are affected.
Upstream Bug:
https://bugs.launchpad.net/nova/+bug/1739593
Upstream Commit:
https://review.openstack.org/#/c/539893/
— Red Hat
Affected Software
Remediation
Patch Available
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is CVE-2017-18191?
CVE-2017-18191 is a vulnerability discovered in OpenStack Nova 15.x through 15.1.0 and 16.x through 16.1.1.
How can an attacker exploit CVE-2017-18191?
An attacker can exploit CVE-2017-18191 by detaching and reattaching an encrypted volume in OpenStack Nova, allowing them to access the underlying raw volume and corrupt the LUKS header, resulting in a denial of service attack on the compute host.
What is the severity of CVE-2017-18191?
CVE-2017-18191 has a severity rating of 7.5 (high).
Which versions of OpenStack Nova are affected by CVE-2017-18191?
OpenStack Nova 15.x through 15.1.0 and 16.x through 16.1.1 are affected by CVE-2017-18191.
How can I fix CVE-2017-18191 in my OpenStack Nova installation?
To fix CVE-2017-18191, it is recommended to update your OpenStack Nova installation to a version that is not affected by the vulnerability.