Security restrictions bypass in OpenShift Container Platform 4.12

1) Input validation error

EUVDB-ID: #VU70478

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-4318

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to bypass certain security restrictions.

The vulnerability exists due to improper input validation when handling newline characters in environment variables. A local user can create a specially crafted environment variable and add entries to a container's /etc/passwd. It is also possible to circumvent admission validation of username/UID by adding such an entry.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.12.0 - 4.12.5

kernel-rt (Red Hat package): before 4.18.0-372.46.1.rt7.203.el8_6

openshift (Red Hat package): before 4.12.0-202302211516.p0.g18eadca.assembly.stream.el9

cri-o (Red Hat package): before 1.25.2-10.rhaos4.12.git0a083f9.el8

kernel (Red Hat package): before 4.18.0-372.46.1.el8_6

CPE2.3

• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.12.5:*:*:*:*:*:*:

External links

http://access.redhat.com/errata/RHSA-2023:1033

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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