Vulnerability Database
289,697
Total vulnerabilities in the database
CVE-2020-8562
As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane.
| Software | From | Fixed in |
|---|---|---|
| kubernetes / kubernetes | 1.21.0 | 1.21.0.x |
| kubernetes / kubernetes | 1.20.0 | 1.20.6.x |
| kubernetes / kubernetes | - | 1.18.18.x |
| kubernetes / kubernetes | 1.19.0 | 1.19.10.x |
k8s.io/kubernetes
|
1.21.0 | 1.21.1 |
|
k8s.io/kubernetes
|
1.20.0 | 1.20.7 |
|
k8s.io/kubernetes
|
1.19.0 | 1.19.11 |
|
k8s.io/kubernetes
|
- | 1.18.19 |