#VU80006 Input validation error in Kubernetes - CVE-2023-3676

Vulnerability identifier: #VU80006

Vulnerability risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-3676

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Kubernetes
Server applications / Frameworks for developing and running applications

Vendor: Kubernetes

Description

The vulnerability allows a remote user to escalate privileges on Windows nodes.

The vulnerability exists due to improper input validation. A remote user with ability to create pods on Windows nodes can obtain administrative privileges on these nodes.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Kubernetes: 1.0.0 - 1.0.7, 1.1.0 - 1.19.16, 1.2.0 - 1.28.0, 1.3.0 - 1.3.10, 1.4.0 - 1.4.12, 1.5.0 - 1.5.8, 1.6.0 - 1.6.13, 1.7.0 - 1.7.16, 1.8.0 - 1.8.15, 1.9.0 - 1.9.11

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External links
http://seclists.org/oss-sec/2023/q3/124
http://github.com/kubernetes/kubernetes/issues/119339

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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.