Privilege Escalation in Kubernetes
Critical severity
GitHub Reviewed
Published
Feb 15, 2022
to the GitHub Advisory Database
•
Updated Jan 9, 2023
Package
Affected versions
< 1.10.11
>= 1.11.0, < 1.11.5
>= 1.12.0, < 1.12.3
Patched versions
1.10.11
1.11.5
1.12.3
Description
Reviewed
May 20, 2021
Published to the GitHub Advisory Database
Feb 15, 2022
Last updated
Jan 9, 2023
In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers, then send arbitrary requests over the same connection directly to the backend, authenticated with the Kubernetes API server's TLS credentials used to establish the backend connection.
References