Protects SPIRE Agent's Chart Against YAML Template Injection (#450)
* protects agent's chart against template injection Signed-off-by: Nico Weisenauer <[email protected]> * removes unnecessary braces and whitespace Signed-off-by: Nico Weisenauer <[email protected]> * Removes int type validation via cast Signed-off-by: Nico Weisenauer <[email protected]> --------- Signed-off-by: Nico Weisenauer <[email protected]>
This commit is contained in:
nweisenauer
@@ -75,20 +75,20 @@ Create chart name and version as used by the chart label.
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Common labels
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*/}}
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{{- define "spire-agent.labels" -}}
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helm.sh/chart: {{ include "spire-agent.chart" . }}
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helm.sh/chart: {{ include "spire-agent.chart" . | quote }}
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{{ include "spire-agent.selectorLabels" . }}
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{{- if .Chart.AppVersion }}
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app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
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{{- end }}
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app.kubernetes.io/managed-by: {{ .Release.Service }}
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app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
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{{- end }}
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{{/*
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Selector labels
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*/}}
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{{- define "spire-agent.selectorLabels" -}}
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app.kubernetes.io/name: {{ include "spire-agent.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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app.kubernetes.io/name: {{ include "spire-agent.name" . | quote }}
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app.kubernetes.io/instance: {{ .Release.Name | quote }}
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{{- end }}
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{{/*
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@@ -53,7 +53,7 @@ agent:
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default_svid_name: {{ .Values.sds.defaultSvidName | quote }}
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default_bundle_name: {{ .Values.sds.defaultBundleName | quote }}
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default_all_bundles_name: {{ .Values.sds.defaultAllBundlesName | quote }}
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disable_spiffe_cert_validation: {{ .Values.sds.disableSpiffeCertValidation }}
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disable_spiffe_cert_validation: {{ eq .Values.sds.disableSpiffeCertValidation true }}
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{{- end }}
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{{- with .Values.experimental }}
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@@ -97,7 +97,7 @@ plugins:
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{{- if eq (.enabled | toString) "true" }}
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tpm:
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plugin_cmd: "/tpm/tpm_attestor_agent"
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plugin_checksum: {{ .plugin.checksum }}
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plugin_checksum: {{ .plugin.checksum | quote }}
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plugin_data: {}
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{{- $nodeAttestorUsed = add1 $nodeAttestorUsed }}
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{{- end }}
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@@ -126,9 +126,9 @@ plugins:
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kubelet_ca_path: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
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{{- end }}
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skip_kubelet_verification: {{ eq .Values.workloadAttestors.k8s.verification.type "skip" }}
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disable_container_selectors: {{ .Values.workloadAttestors.k8s.disableContainerSelectors }}
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use_new_container_locator: {{ .Values.workloadAttestors.k8s.useNewContainerLocator }}
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verbose_container_locator_logs: {{ .Values.workloadAttestors.k8s.verboseContainerLocatorLogs }}
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disable_container_selectors: {{ eq .Values.workloadAttestors.k8s.disableContainerSelectors true}}
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use_new_container_locator: {{ eq .Values.workloadAttestors.k8s.useNewContainerLocator true }}
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verbose_container_locator_logs: {{ eq .Values.workloadAttestors.k8s.verboseContainerLocatorLogs true }}
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{{- if eq (include "spire-agent.connect-by-hostname" .) "true" }}
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node_name_env: "MY_NODE_NAME"
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{{- end }}
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@@ -168,8 +168,8 @@ telemetry:
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: {{ include "spire-agent.fullname" . }}{{ $nameSuffix }}
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namespace: {{ include "spire-agent.namespace" . }}
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name: {{ printf "%s%s" (include "spire-agent.fullname" .) $nameSuffix | quote }}
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namespace: {{ include "spire-agent.namespace" . | quote }}
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{{- with .Values.configMap.annotations }}
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annotations:
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{{- toYaml . | nindent 4 }}
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@@ -22,16 +22,16 @@
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apiVersion: apps/v1
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kind: DaemonSet
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metadata:
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name: {{ include "spire-agent.fullname" . }}{{ $nameSuffix }}
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namespace: {{ include "spire-agent.namespace" . }}
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name: {{ printf "%s%s" (include "spire-agent.fullname" .) $nameSuffix | quote }}
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namespace: {{ include "spire-agent.namespace" . | quote}}
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labels:
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{{- include "spire-agent.labels" . | nindent 4 }}
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app.kubernetes.io/component: {{ $name }}
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app.kubernetes.io/component: {{ $name | quote }}
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spec:
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selector:
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matchLabels:
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{{- include "spire-agent.selectorLabels" . | nindent 6 }}
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app.kubernetes.io/component: {{ $name }}
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app.kubernetes.io/component: {{ $name | quote }}
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{{- with .Values.updateStrategy }}
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updateStrategy:
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{{- if not (has .type (list "RollingUpdate" "OnDelete")) }}
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@@ -47,13 +47,13 @@ spec:
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metadata:
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annotations:
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kubectl.kubernetes.io/default-container: spire-agent
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checksum/config: {{ $configSum }}
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checksum/config: {{ $configSum | quote }}
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{{- with .Values.podAnnotations }}
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{{- toYaml . | nindent 8 }}
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{{- end }}
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labels:
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{{- include "spire-agent.selectorLabels" . | nindent 8 }}
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app.kubernetes.io/component: {{ $name }}
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app.kubernetes.io/component: {{ $name | quote }}
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{{- with .Values.podLabels }}
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{{- toYaml . | nindent 8 }}
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{{- end }}
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@@ -65,7 +65,7 @@ spec:
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hostPID: true
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hostNetwork: true
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dnsPolicy: ClusterFirstWithHostNet
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serviceAccountName: {{ include "spire-agent.serviceAccountName" . }}
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serviceAccountName: {{ include "spire-agent.serviceAccountName" . | quote }}
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securityContext:
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{{- toYaml $podSecurityContext | nindent 8 }}
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{{- include "spire-lib.default_node_priority_class_name" . | nindent 6 }}
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@@ -79,17 +79,17 @@ spec:
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securityContext:
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{{- $mainSecurityContext | toYaml | nindent 12 }}
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image: {{ template "spire-lib.image" (dict "image" .Values.hostCert.image "global" .Values.global) }}
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imagePullPolicy: {{ .Values.hostCert.image.pullPolicy }}
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imagePullPolicy: {{ .Values.hostCert.image.pullPolicy | quote }}
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command: ["bash", "-xc"]
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args:
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- |
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{{- if ne .Values.workloadAttestors.k8s.verification.hostCert.fileName "" }}
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openssl x509 -in "{{ .Values.workloadAttestors.k8s.verification.hostCert.basePath }}/{{ .Values.workloadAttestors.k8s.verification.hostCert.fileName }}" -out /hostCert/kubelet.crt
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openssl x509 -in {{ printf "%s/%s" .Values.workloadAttestors.k8s.verification.hostCert.basePath .Values.workloadAttestors.k8s.verification.hostCert.fileName | quote }} -out /hostCert/kubelet.crt
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{{- else }}
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if [ -f "{{ .Values.workloadAttestors.k8s.verification.hostCert.basePath }}/kubelet-server-current.pem" ]; then
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openssl x509 -in "{{ .Values.workloadAttestors.k8s.verification.hostCert.basePath }}/kubelet-server-current.pem" -out /hostCert/kubelet.crt
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openssl x509 -in {{ printf "%s/kubelet-server-current.pem" .Values.workloadAttestors.k8s.verification.hostCert.basePath | quote }} -out /hostCert/kubelet.crt
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elif [ -f "{{ .Values.workloadAttestors.k8s.verification.hostCert.basePath }}/kubelet.crt" ]; then
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openssl x509 -in "{{ .Values.workloadAttestors.k8s.verification.hostCert.basePath }}/kubelet.crt" -out /hostCert/kubelet.crt
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openssl x509 -in {{ printf "%s/kubelet.crt" .Values.workloadAttestors.k8s.verification.hostCert.basePath | quote }} -out /hostCert/kubelet.crt
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else
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{{- if eq .Values.workloadAttestors.k8s.verification.type "auto" }}
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{{- if $cbh }}
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@@ -150,7 +150,7 @@ spec:
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readOnly: true
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- name: kmsg
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mountPath: /dev/kmsg
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imagePullPolicy: {{ .Values.nodeAttestor.tpmDirect.pubHash.image.pullPolicy }}
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imagePullPolicy: {{ .Values.nodeAttestor.tpmDirect.pubHash.image.pullPolicy | quote }}
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{{- end }}
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- name: init-tpm-direct
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securityContext:
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@@ -161,16 +161,16 @@ spec:
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- -ec
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- |
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# SPIRE must be able to fork the plugin directly within its container. Copy the plugin into a volume that can be mounted where SPIRE can execute it.
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cp -a {{ .Values.nodeAttestor.tpmDirect.plugin.path }} /tpm/tpm_attestor_agent
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cp -a {{ .Values.nodeAttestor.tpmDirect.plugin.path | quote }} /tpm/tpm_attestor_agent
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volumeMounts:
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- name: tpm-direct
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mountPath: /tpm
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imagePullPolicy: {{ .Values.nodeAttestor.tpmDirect.plugin.image.pullPolicy }}
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imagePullPolicy: {{ .Values.nodeAttestor.tpmDirect.plugin.image.pullPolicy | quote }}
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{{- end }}
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{{- if gt (len $socketAlternateNames) 0 }}
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- name: ensure-alternate-names
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image: {{ template "spire-lib.image" (dict "image" .Values.socketAlternate.image "global" .Values.global) }}
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imagePullPolicy: {{ .Values.socketAlternate.image.pullPolicy }}
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imagePullPolicy: {{ .Values.socketAlternate.image.pullPolicy | quote }}
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command: ["bash", "-xc"]
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{{- /* 1. Look for symlinks pointing at the wrong place and remove them. 2. Make symlinks that don't exist. 3. If new socket is pointing at an existing symlink, remove old symlink. */}}
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args:
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@@ -195,12 +195,12 @@ spec:
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{{- if gt (int (dig "fsGroup" 0 $podSecurityContext)) 0 }}
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- name: fsgroupfix
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image: {{ template "spire-lib.image" (dict "image" .Values.fsGroupFix.image "global" .Values.global) }}
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imagePullPolicy: {{ .Values.fsGroupFix.image.pullPolicy }}
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imagePullPolicy: {{ .Values.fsGroupFix.image.pullPolicy | quote }}
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command: ["bash", "-c"]
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args:
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- |
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chown -R {{ $podSecurityContext.runAsUser }}:{{ $podSecurityContext.fsGroup }} {{ $socketPath | dir }} /tmp/spire-agent/private
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chown -R {{ $podSecurityContext.runAsUser }}:{{ $podSecurityContext.fsGroup }} /var/lib/spire
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chown -R {{ printf "%v:%v" $podSecurityContext.runAsUser $podSecurityContext.fsGroup | quote }} {{ $socketPath | dir }} /tmp/spire-agent/private
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chown -R {{ printf "%v:%v" $podSecurityContext.runAsUser $podSecurityContext.fsGroup | quote }} /var/lib/spire
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resources:
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{{- toYaml .Values.fsGroupFix.resources | nindent 12 }}
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volumeMounts:
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@@ -218,9 +218,9 @@ spec:
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{{- toYaml .Values.initContainers | nindent 8 }}
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{{- end }}
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containers:
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- name: {{ .Chart.Name }}
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- name: {{ .Chart.Name | quote }}
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image: {{ template "spire-lib.image" (dict "appVersion" $.Chart.AppVersion "image" .Values.image "global" .Values.global) }}
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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imagePullPolicy: {{ .Values.image.pullPolicy | quote }}
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args: ["-config", "/opt/spire/conf/agent/agent.conf"]
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securityContext:
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{{- $mainSecurityContext | toYaml | nindent 12 }}
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@@ -314,7 +314,11 @@ spec:
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{{- if .Values.sockets.admin.mountOnHost }}
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- name: spire-agent-admin-socket-dir
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hostPath:
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path: {{ .Values.sockets.hostBasePath }}/{{ if .Values.upstream }}upstream.csi.spiffe.io{{ else }}csi.spiffe.io{{ end }}/admin
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{{- if .Values.upstream }}
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path: {{ printf "%s/upstream.csi.spiffe.io/admin" .Values.sockets.hostBasePath | quote }}
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{{- else }}
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path: {{ printf "%s/csi.spiffe.io/admin" .Values.sockets.hostBasePath | quote }}
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{{- end }}
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type: DirectoryOrCreate
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{{- else }}
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- name: spire-agent-admin-socket-dir
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@@ -323,7 +327,11 @@ spec:
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{{- if eq .Values.persistence.type "hostPath" }}
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- name: spire-agent-persistence
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hostPath:
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path: {{ .Values.persistence.hostPath }}/{{ if .Values.upstream }}upstream.csi.spiffe.io{{ else }}csi.spiffe.io{{ end }}
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{{- if .Values.upstream }}
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path: {{ printf "%s/upstream.csi.spiffe.io" .Values.persistence.hostPath | quote }}
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{{- else }}
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path: {{ printf "%s/csi.spiffe.io" .Values.persistence.hostPath | quote }}
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{{- end }}
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type: DirectoryOrCreate
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{{- else }}
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- name: spire-agent-persistence
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@@ -332,7 +340,7 @@ spec:
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{{- if eq (len .Values.trustBundleURL) 0 }}
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- name: spire-bundle
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configMap:
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name: {{ include "spire-lib.bundle-configmap" . }}{{ $nameSuffix }}
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name: {{ printf "%s%s" (include "spire-lib.bundle-configmap" .) $nameSuffix | quote }}
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{{- end }}
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{{- if .Values.nodeAttestor.tpmDirect.enabled }}
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- name: tpm-direct
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@@ -364,7 +372,7 @@ spec:
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emptyDir: {}
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- name: host-cert
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hostPath:
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path: {{ .Values.workloadAttestors.k8s.verification.hostCert.basePath }}
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path: {{ .Values.workloadAttestors.k8s.verification.hostCert.basePath | quote }}
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{{- end }}
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{{- if gt (len .Values.extraVolumes) 0 }}
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{{- toYaml .Values.extraVolumes | nindent 8 }}
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@@ -5,7 +5,7 @@ apiVersion: monitoring.coreos.com/v1
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kind: PodMonitor
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metadata:
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name: {{ include "spire-agent.fullname" . }}
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namespace: {{ $namespace }}
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namespace: {{ $namespace | quote }}
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labels:
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{{- include "spire-agent.labels" . | nindent 4 }}
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{{- if ne (len (dig "telemetry" "prometheus" "podMonitor" "labels" (dict) .Values.global)) 0 }}
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@@ -22,6 +22,6 @@ spec:
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- port: prom
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{{- if ne $namespace $podNamespace }}
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namespaceSelector:
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kubernetes.io/metadata.name: {{ $podNamespace }}
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kubernetes.io/metadata.name: {{ $podNamespace | quote }}
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{{- end }}
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{{- end }}
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@@ -2,7 +2,7 @@
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kind: ClusterRole
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apiVersion: rbac.authorization.k8s.io/v1
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metadata:
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name: {{ include "spire-agent.fullname" . }}
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name: {{ include "spire-agent.fullname" . | quote }}
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rules:
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- apiGroups: [""]
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resources:
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@@ -15,12 +15,12 @@ rules:
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kind: ClusterRoleBinding
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apiVersion: rbac.authorization.k8s.io/v1
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metadata:
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name: {{ include "spire-agent.fullname" . }}
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name: {{ include "spire-agent.fullname" . | quote }}
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subjects:
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- kind: ServiceAccount
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name: {{ include "spire-agent.serviceAccountName" . }}
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namespace: {{ include "spire-agent.namespace" . }}
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name: {{ include "spire-agent.serviceAccountName" . | quote }}
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namespace: {{ include "spire-agent.namespace" . | quote }}
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roleRef:
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kind: ClusterRole
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name: {{ include "spire-agent.fullname" . }}
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name: {{ include "spire-agent.fullname" . | quote }}
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apiGroup: rbac.authorization.k8s.io
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@@ -2,7 +2,7 @@
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apiVersion: security.openshift.io/v1
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kind: SecurityContextConstraints
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metadata:
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name: {{ include "spire-agent.fullname" . }}
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name: {{ include "spire-agent.fullname" . | quote }}
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readOnlyRootFilesystem: true
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runAsUser:
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type: RunAsAny
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@@ -11,7 +11,7 @@ seLinuxContext:
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supplementalGroups:
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type: RunAsAny
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users:
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- system:serviceaccount:{{ include "spire-agent.namespace" . }}:{{ include "spire-agent.serviceAccountName" . }}
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- {{ printf "system:serviceaccount:%s:%s" (include "spire-agent.namespace" .) (include "spire-agent.serviceAccountName" .) | quote }}
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volumes:
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- configMap
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- hostPath
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@@ -2,8 +2,8 @@
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: {{ include "spire-agent.serviceAccountName" . }}
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namespace: {{ include "spire-agent.namespace" . }}
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name: {{ include "spire-agent.serviceAccountName" . | quote }}
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namespace: {{ include "spire-agent.namespace" . | quote }}
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labels:
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{{- include "spire-agent.labels" . | nindent 4 }}
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{{- with .Values.serviceAccount.annotations }}
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@@ -53,17 +53,17 @@
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{{- $repo := .image.repository }}
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{{- $tag := .image.tag | toString }}
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{{- if eq (substr 0 7 $tag) "sha256:" }}
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{{- printf "%s/%s@%s" $registry $repo $tag }}
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{{- printf "%s/%s@%s" $registry $repo $tag | quote }}
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{{- else if .appVersion }}
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{{- $appVersion := .appVersion }}
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{{- if and (hasKey . "ubi") (dig "openshift" false .global) }}
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{{- $appVersion = printf "ubi-%s" $appVersion }}
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{{- end }}
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{{- printf "%s%s:%s" $registry $repo (default $appVersion $tag) }}
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{{- printf "%s%s:%s" $registry $repo (default $appVersion $tag) | quote }}
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{{- else if $tag }}
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{{- printf "%s%s:%s" $registry $repo $tag }}
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{{- printf "%s%s:%s" $registry $repo $tag | quote }}
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{{- else }}
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{{- printf "%s%s" $registry $repo }}
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{{- printf "%s%s" $registry $repo | quote }}
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{{- end }}
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{{- end }}
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@@ -309,7 +309,7 @@ securityContext - the subbranch of values that contains the securityContext to m
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{{- define "spire-lib.default_node_priority_class_name" }}
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{{- if .Values.priorityClassName }}
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priorityClassName: {{ .Values.priorityClassName }}
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priorityClassName: {{ .Values.priorityClassName | quote }}
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{{- else if and (dig "spire" "recommendations" "enabled" false .Values.global) (dig "spire" "recommendations" "priorityClassName" true .Values.global) }}
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priorityClassName: system-node-critical
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{{- end }}
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@@ -317,7 +317,7 @@ priorityClassName: system-node-critical
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{{- define "spire-lib.default_cluster_priority_class_name" }}
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{{- if .Values.priorityClassName }}
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priorityClassName: {{ .Values.priorityClassName }}
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priorityClassName: {{ .Values.priorityClassName | quote }}
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{{- else if and (dig "spire" "recommendations" "enabled" false .Values.global) (dig "spire" "recommendations" "priorityClassName" true .Values.global) }}
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priorityClassName: system-cluster-critical
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{{- end }}
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Reference in New Issue
Block a user