CVE-2020-17376 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Reference

http://www.openwall.com/lists/oss-security/2020/08/25/4 https://launchpad.net/bugs/1890501 https://security.openstack.org/ossa/OSSA-2020-006.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

LOW

Base Severity

8.3