| name | review-security-k8s-pod |
| description | Reviews Kubernetes Pod security contexts for workload-level isolation and privilege escalation risks. |
Task
Review Pod configurations (PodSecurityContext, SecurityContext) for workload vulnerabilities.
Checks
1. Privilege Escalation & Host Breakout
- Privileged: Flag
privileged: true.
- Host Namespaces: Flag
hostNetwork: true, hostPID: true, hostIPC: true. If runAsUser: 0 or runAsGroup: 0, flag hostUsers: true and flag omitted hostUsers (since it's true by default).
- Host Volumes: Flag any use of
hostPath volumes (direct node filesystem access).
- Privilege Escalation: Require
allowPrivilegeEscalation: false.
2. Capabilities & Isolation
- Root Execution: If
hostUsers: false or if hostUsers is omitted, require runAsNonRoot: true. Flag runAsUser: 0 or runAsGroup: 0.
- Linux Capabilities: Require
capabilities.drop: ["ALL"]. Flag highly privileged additions (e.g., CAP_SYS_ADMIN, CAP_NET_ADMIN, CAP_NET_RAW, CAP_SYS_MODULE, CAP_SYS_PTRACE, CAP_DAC_OVERRIDE).
- Filesystem: Require
readOnlyRootFilesystem: true where applicable.
- Seccomp: Require seccomp profiles (e.g.,
seccompProfile.type: RuntimeDefault).
3. Service Account Hygiene
- Default Account: Flag use of the
default service account.
- Token Automounting: Require
automountServiceAccountToken: false unless API access is explicitly needed.
- Token Storage: Flag static Secret-based service account tokens. Require ephemeral
TokenRequest volume mounts.
4. Supply Chain & Immutability
- Image Digests: Require container images to be pinned via immutable SHA digests (
@sha256:...) instead of mutable tags.