GHSA-ffmh-r67w-m88f CVE-2017-18191 PYSEC-2026-689
OpenStack Nova Denial of service attack on the compute host
- Severity
- 7.5 / 10
- High · CVSS 3.0
- Exploit chance (EPSS)
- 3.72%
- Chance of exploitation in the next 30 days. Higher than 89.77% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- —
- Not classified
- Fix
15.1.1- Upgrade nova to this version or later
Description
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.
Affected versions
PyPI
| Package | Vulnerable | Fixed in |
|---|---|---|
| nova | >= 15.0.0, < 15.1.1 |
15.1.1 |
| nova | >= 16.0.0, < 16.1.2 |
16.1.2 |
| nova | >= 15.0.0, < 15.1.1>= 16.0.0, < 16.1.2 |
15.1.116.1.2 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
nova PyPI → 15.1.1
- pip
pip install --upgrade "nova>=15.1.1"- poetry
poetry add "nova>=15.1.1"- uv
uv add "nova>=15.1.1"
Severity breakdown
CVSS 3.0 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
References
Advisories
Packages
Other links
- github.com/openstack/nova/commit/0225a61fc4557c1257383a654f0741f7ef2ddeac
- github.com/openstack/nova/commit/5b64a1936122eeb35f37a09f9d38159e1a224c58
- github.com/openstack/nova/commit/cd3eb60c2c00bcccfa9ccd4bf9d1a96ae7a5cd88
- access.redhat.com/errata/RHSA-2018:2332
- access.redhat.com/errata/RHSA-2018:2714
- access.redhat.com/errata/RHSA-2018:2855
- launchpad.net/bugs/1739593
- review.openstack.org/539893
- security.openstack.org/ossa/OSSA-2018-001.html
- openwall.com/lists/oss-security/2018/04/20/3
- securityfocus.com/bid/103104
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-mfg3-p6m3-gjgr OpenStack Nova: Nova scheduler hint injection bypasses Placement resource claims and scheduling constraints | High | Also affects nova |
| GHSA-m4f3-qp2w-gwh6 OpenStack Nova calls qemu-img without format restrictions for resize | High | Also affects nova |
| GHSA-rm86-h44c-2r2m OpenStack Nova vulnerable to unauthorized access to potentially sensitive data | Medium | Also affects nova |
| GHSA-r4v4-w9pv-6fph OpenStack Cinder, Glance, and Nova vulnerable to arbitrary file access | Medium | Also affects nova |
| GHSA-7h75-hwxx-qpgc OpenStack Cinder, glance, and Nova vulnerable to Path Traversal | Medium | Also affects nova |
| GHSA-v725-c588-h936 OpenStack Nova Changing vnic_type breaks compute service restart | Low | Also affects nova |
| GHSA-22jm-4hxw-35jf OpenStack Nova can leak consoleauth token into log files | Low | Also affects nova |
| GHSA-43cm-73px-5v4m OpenStack Compute (Nova) Resource limit circumvention in Nova private flavors | Low | Also affects nova |
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