An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously underg
An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously undergone live migration, a user may gain access to destination host devices that share the same paths as host devices previously referenced by the virtual machine on the source host. This can include block devices that map to different Cinder volumes at the destination than at the source. Only deployments allowing host-based connections (for instance, root and ephemeral devices) are affected.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | nova | < 19.3.1, >= 20.0.0, < 20.3.1, >= 21.0.0, < 21.1.0 | 19.3.1, 20.3.1, 21.1.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-17376
- https://github.com/openstack/nova/commit/1bb8ee95d4c3ddc3f607ac57526b75af1b7fbcff
- https://github.com/openstack/nova/commit/2faf17995dd9daa6f0b91e44be43264e447c678d
- https://github.com/openstack/nova/commit/a721ca5f510ce3c8ef24f22dac9e475b3d7651db
- https://github.com/openstack/nova/commit/b9ea91d17703f5b324a50727b6503ace0f4e95eb
- https://github.com/openstack/nova/commit/c438fd9a0eb1903306a53ab44e3ae80660d8a429
- https://github.com/openstack/nova
- https://github.com/pypa/advisory-database/tree/main/vulns/nova/PYSEC-2020-243.yaml
- https://launchpad.net/bugs/1890501
- https://security.openstack.org/ossa/OSSA-2020-006.html
- http://www.openwall.com/lists/oss-security/2020/08/25/4
- https://github.com/advisories/GHSA-c7w7-9c85-4qxv
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L- Weakness (CWE)
CWE-611- Platform
- Python (PyPI)
- Package
nova- Disclosed
- 26.08.2020
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-c7w7-9c85-4qxv - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2020-243 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: nova
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 49
- First → latest
- 08.2012 06.2026
- Without a fix
- 5
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 11
- Medium 29
- Low 8
Disclosures per year
- 2017: 1
- 2018: 0
- 2019: 1
- 2020: 1
- 2021: 0
- 2022: 34
- 2023: 1
- 2024: 2
- 2025: 0
- 2026: 2
earlier: 7
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An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously underg this entry
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