CVE-2020-17376

HIGH
8.3
CVSS Score
Published: August 26, 2020 at 06:45 PM UTC
Updated: June 17, 2026 at 02:58 AM UTC
1 product affected across 1 vendorNova

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Severity
HIGH8.3
Exploit prediction
EPSS 2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 19.3.120.0.0 ≤ v < 20.3.121.0.0
Affected range stops below 19.3.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 20.3.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_MISCMailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/08/25/4
x_refsource_MISCExploitThird Party Advisory
https://launchpad.net/bugs/1890501

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-611

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