Fedora 34 update for libvirt



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-3631
CWE-ID CWE-732
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

libvirt
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Incorrect permission assignment for critical resource

EUVDB-ID: #VU62735

Risk: Medium

CVSSv4.0: 1.3 [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 - Incorrect Permission Assignment for Critical Resource

Exploit availability: No

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.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 34

libvirt: before 7.0.0-6.fc34

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-bc6ad65da0


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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