Vulnerability · Published Jul 29, 2020 · Assigned by kubernetes

CVE-2020-8553Kubernetes ingress-nginx Compromise of auth via subset/superset namespace names

Medium 5.9

In plain English

A medium-severity security flaw in ingress-nginx from Kubernetes. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.9%top 40.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

The Kubernetes ingress-nginx component prior to version 0.28.0 allows a user with the ability to create namespaces and to read and create ingress objects to overwrite the password file of another ingress which uses nginx.ingress.kubernetes.io/auth-type: basic and which has a hyphenated namespace or secret name.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	k8s.io/ingress-nginx	0.28.0	GHSA-hhpm-74pm-hf35

Affected products (as reported)

Vendor	Product	Versions
Kubernetes	ingress-nginx	unspecified – before 0.28.0

Weakness: CWE-73 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/kubernetes/ingress-nginx/issues/5126 x_refsource_CONFIRM