Package Instance

Kubernetes kubectl cp Vulnerable to Symlink Attack
The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.

Kubernetes Unsafe Cacheing
In Kubernetes v1.8.x-v1.14.x, schema info is cached by kubectl in the location specified by `--cache-dir` (defaulting to `$HOME/.kube/http-cache`), written with world-writeable permissions (`rw-rw-rw-`). If `--cache-dir` is specified and pointed at a different location accessible to other users/groups, the written files may be modified by other users/groups and disrupt the kubectl invocation.

Information Exposure in Kubernetes
Kubernetes before 1.2.0-alpha.5 allows remote attackers to read arbitrary pod logs via a container name.

Kubelet Incorrect Privilege Assignment
In kubelet v1.13.6 and v1.14.2, containers for pods that do not specify an explicit `runAsUser` attempt to run as uid 0 (root) on container restart, or if the image was previously pulled to the node. If the pod specified `mustRunAsNonRoot: true`, the kubelet will refuse to start the container as root. If the pod did not specify `mustRunAsNonRoot: true`, the kubelet will run the container as uid 0.

Kubernetes did not effectively clear service account credentials
In Kubernetes v1.12.0-v1.12.4 and v1.13.0, the rest.AnonymousClientConfig() method returns a copy of the provided config, with credentials removed (bearer token, username/password, and client certificate/key data). In the affected versions, rest.AnonymousClientConfig() did not effectively clear service account credentials loaded using rest.InClusterConfig()

Kubernetes Arbitrary Command Injection
In Kubernetes versions 1.9.0-1.9.9, 1.10.0-1.10.5, and 1.11.0-1.11.1, user input was handled insecurely while setting up volume mounts on Windows nodes, which could lead to command line argument injection.

### Specific Go Packages Affected
k8s.io/kubernetes/pkg/util/mount

Authorization bypass in Openshift
Openshift allows remote attackers to gain privileges by updating a build configuration that was created with an allowed type to a type that is not allowed.

Access Restriction Bypass in kubernetes
The API server in Kubernetes does not properly check admission control, which allows remote authenticated users to access additional resources via a crafted patched object.

### Specific Go Packages Affected
github.com/kubernetes/kubernetes/pkg/apiserver