CVE-2020-17376

Publication date 26 August 2020

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

8.3 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
nova 22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 2:21.2.4-0ubuntu2.1
18.04 LTS bionic
Fixed 2:17.0.13-0ubuntu5.3
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

Notes


mdeslaur

This is only an issue when libvirt is 1.3.4 and later. On Xenial, libvirt is 1.3.1 and is not vulnerable. This is fixed in focal-updates but is not yet in -security

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
nova

Severity score breakdown

Parameter Value
Base score 8.3 · High
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-5866-1
    • Nova vulnerabilities
    • 13 February 2023

Other references