MitM-attack in ManageIQ kubeclient

1) Improper Certificate Validation

EUVDB-ID: #VU62574

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-0759

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to the way kubeclient parses kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). A remote attacker can perform MitM attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kubeclient: 0.0.5 - 4.9.2

External links

http://github.com/ManageIQ/kubeclient/issues/554
http://github.com/ManageIQ/kubeclient/issues/555

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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