#VU62574 Improper Certificate Validation in kubeclient - CVE-2022-0759

Vulnerability identifier: #VU62574

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-0759

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
kubeclient
Web applications / Other software

Vendor: ManageIQ

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
https://github.com/ManageIQ/kubeclient/issues/554
https://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.