Incorrect permission assignment for critical resource in libvirt - CVE-2021-3631
Published: May 3, 2022
Vulnerability identifier: #VU62735
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-3631
CWE-ID: CWE-732
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: libvirt.org
Affected software:
libvirt
libvirt
Detailed vulnerability description
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to an error in the way SELinux MCS category pairs for VMs' dynamic labels in security/security_selinux.c. An attacker with access to the guest OS can access files labeled for another guest.
How to mitigate CVE-2021-3631
Install updates from vendor's website.