Security restrictions bypass in OpenShift Container Platform 4.9

1) Incorrect permission assignment for critical resource

EUVDB-ID: #VU68299

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-0532

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect sysctls validation in CRI-O. The sysctls from the list of "safe" sysctls specified for the cluster will be applied to the host if an attacker is able to create a pod with a hostIPC and hostNetwork kernel namespace.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.9.0 - 4.9.24

openshift-ansible (Red Hat package): 4.9.0-202202111950.p0.g4d833d3.assembly.stream.el7

openshift (Red Hat package): 4.9.0-202110080828.p0.git.894a78b.assembly.stream.el8 - 4.9.0-202202111950.p0.gb93fd35.assembly.stream.el8

cri-o (Red Hat package): before 1.22.2-2.rhaos4.9.gitb030be8.el8

External links

http://access.redhat.com/errata/RHBA-2022:0794

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.