Input validation error in kubernetes ingress-nginx

1) Input validation error

EUVDB-ID: #VU102099

Risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-7646

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to in the default configuration some credential has access to all secrets in the cluster.. A remote user with permission to create Ingress objects (in the `networking.k8s.io` or `extensions` API group) can bypass annotation validation to inject arbitrary commands and obtain the credentials of the ingress-nginx controller.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Ingress-NGINX Controller for Kubernetes: before 1.11.2

CPE2.3

• cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*

External links

https://github.com/kubernetes/kubernetes/issues/126744
https://groups.google.com/g/kubernetes-security-announce/c/a1__cKjWkfA
https://github.com/kubernetes/ingress-nginx/pull/11719
https://github.com/kubernetes/ingress-nginx/pull/11721

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.