#VU102099 Input validation error in Ingress-NGINX Controller for Kubernetes - CVE-2024-7646

Vulnerability identifier: #VU102099

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ingress-NGINX Controller for Kubernetes
Server applications / Other server solutions

Vendor: Kubernetes

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 updates from vendor's website.

Vulnerable software versions

Ingress-NGINX Controller for Kubernetes: before 1.11.2

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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

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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.