CVE-2021-3631 Information

Description

A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs’ dynamic labels. This flaw allows one exploited guest to access files labeled for another guest resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.

CVSS Vector

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

Reference

https://access.redhat.com/errata/RHSA-2021:3631 https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2 https://bugzilla.redhat.com/show_bug.cgi?id=1977726 https://gitlab.com/libvirt/libvirt/-/issues/153 https://security.netapp.com/advisory/ntap-20220331-0010/

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.3