mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-22 13:00:19 +00:00
e3bf375035
update kubernetes to latest v1.25.0 release. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
111 lines
2.9 KiB
Go
111 lines
2.9 KiB
Go
/*
|
|
Copyright 2021 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package policy
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
corev1 "k8s.io/api/core/v1"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
|
"k8s.io/pod-security-admission/api"
|
|
)
|
|
|
|
/*
|
|
Adding NET_RAW or capabilities beyond the default set must be disallowed.
|
|
|
|
**Restricted Fields:**
|
|
spec.containers[*].securityContext.capabilities.add
|
|
spec.initContainers[*].securityContext.capabilities.add
|
|
|
|
**Allowed Values:**
|
|
undefined / empty
|
|
values from the default set "AUDIT_WRITE", "CHOWN", "DAC_OVERRIDE","FOWNER", "FSETID", "KILL", "MKNOD", "NET_BIND_SERVICE", "SETFCAP", "SETGID", "SETPCAP", "SETUID", "SYS_CHROOT"
|
|
*/
|
|
|
|
func init() {
|
|
addCheck(CheckCapabilitiesBaseline)
|
|
}
|
|
|
|
const checkCapabilitiesBaselineID CheckID = "capabilities_baseline"
|
|
|
|
// CheckCapabilitiesBaseline returns a baseline level check
|
|
// that limits the capabilities that can be added in 1.0+
|
|
func CheckCapabilitiesBaseline() Check {
|
|
return Check{
|
|
ID: checkCapabilitiesBaselineID,
|
|
Level: api.LevelBaseline,
|
|
Versions: []VersionedCheck{
|
|
{
|
|
MinimumVersion: api.MajorMinorVersion(1, 0),
|
|
CheckPod: capabilitiesBaseline_1_0,
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
var (
|
|
capabilities_allowed_1_0 = sets.NewString(
|
|
"AUDIT_WRITE",
|
|
"CHOWN",
|
|
"DAC_OVERRIDE",
|
|
"FOWNER",
|
|
"FSETID",
|
|
"KILL",
|
|
"MKNOD",
|
|
"NET_BIND_SERVICE",
|
|
"SETFCAP",
|
|
"SETGID",
|
|
"SETPCAP",
|
|
"SETUID",
|
|
"SYS_CHROOT",
|
|
)
|
|
)
|
|
|
|
func capabilitiesBaseline_1_0(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
|
|
var badContainers []string
|
|
nonDefaultCapabilities := sets.NewString()
|
|
visitContainers(podSpec, func(container *corev1.Container) {
|
|
if container.SecurityContext != nil && container.SecurityContext.Capabilities != nil {
|
|
valid := true
|
|
for _, c := range container.SecurityContext.Capabilities.Add {
|
|
if !capabilities_allowed_1_0.Has(string(c)) {
|
|
valid = false
|
|
nonDefaultCapabilities.Insert(string(c))
|
|
}
|
|
}
|
|
if !valid {
|
|
badContainers = append(badContainers, container.Name)
|
|
}
|
|
}
|
|
})
|
|
|
|
if len(badContainers) > 0 {
|
|
return CheckResult{
|
|
Allowed: false,
|
|
ForbiddenReason: "non-default capabilities",
|
|
ForbiddenDetail: fmt.Sprintf(
|
|
"%s %s must not include %s in securityContext.capabilities.add",
|
|
pluralize("container", "containers", len(badContainers)),
|
|
joinQuote(badContainers),
|
|
joinQuote(nonDefaultCapabilities.List()),
|
|
),
|
|
}
|
|
}
|
|
return CheckResult{Allowed: true}
|
|
}
|