Authentication Bypass by Spoofing The advisory has been revoked - it doesn't affect any version of package k8s.io/kubernetes/staging/src/k8s.io/apiserver/plugin/pkg/authenticator/token/oidc (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-K8SIOKUBERNETESSTAGINGSRCK8SIOAPISERVERPLUGINPKGAUTHENTICATORTOKENOIDC-7216075
- published6 Jun 2024
- disclosed5 Jun 2024
- creditUnknown
Introduced: 5 Jun 2024
CVE-2024-5037 (opens in a new tab)Amendment
This was deemed not a vulnerability.
Overview
k8s.io/kubernetes/staging/src/k8s.io/apiserver/plugin/pkg/authenticator/token/oidc is a package that implements the authenticator.Token interface using the OpenID Connect protocol.
Affected versions of this package are vulnerable to Authentication Bypass by Spoofing due to a flaw in the JWT authentication mechanism. An attacker can bypass the issue ("iss") check and gain unauthorized access by using a forged token. If two servers use the same pair of keys, the attacker can use the token from the first server to deceive the second server, and cause the privilege escape.
Note:
This advisory was revoked, as this vulnerability only affects openshift telemeter, not Kubernetes.
PoC
{
"fakeiss":".eyJpc3MiOiJhY2NvdW50cy5nb29nbGUuY29tIn0.",
"protected":"",
"header":"",
"payload":"",
"signature":""
}