mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-10 01:19:29 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
144 lines
3.9 KiB
Go
144 lines
3.9 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package policy
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import (
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"strings"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/pod-security-admission/api"
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)
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/*
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Sysctls can disable security mechanisms or affect all containers on a host,
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and should be disallowed except for an allowed "safe" subset.
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A sysctl is considered safe if it is namespaced in the container or the Pod,
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and it is isolated from other Pods or processes on the same Node.
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**Restricted Fields:**
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spec.securityContext.sysctls[*].name
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**Allowed Values:**
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'kernel.shm_rmid_forced'
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'net.ipv4.ip_local_port_range'
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'net.ipv4.tcp_syncookies'
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'net.ipv4.ping_group_range'
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'net.ipv4.ip_unprivileged_port_start'
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'net.ipv4.ip_local_reserved_ports'
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'net.ipv4.tcp_keepalive_time'
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'net.ipv4.tcp_fin_timeout'
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'net.ipv4.tcp_keepalive_intvl'
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'net.ipv4.tcp_keepalive_probes'
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'net.ipv4.tcp_rmem'
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'net.ipv4.tcp_wmem'
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*/
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func init() {
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addCheck(CheckSysctls)
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}
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// CheckSysctls returns a baseline level check
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// that limits the value of sysctls in 1.0+
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func CheckSysctls() Check {
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return Check{
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ID: "sysctls",
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Level: api.LevelBaseline,
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Versions: []VersionedCheck{
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{
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MinimumVersion: api.MajorMinorVersion(1, 0),
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CheckPod: sysctlsV1Dot0,
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},
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{
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MinimumVersion: api.MajorMinorVersion(1, 27),
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CheckPod: sysctlsV1Dot27,
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}, {
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MinimumVersion: api.MajorMinorVersion(1, 29),
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CheckPod: sysctlsV1Dot29,
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},
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{
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MinimumVersion: api.MajorMinorVersion(1, 32),
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CheckPod: sysctlsV1Dot32,
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},
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},
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}
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}
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var (
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sysctlsAllowedV1Dot0 = sets.NewString(
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"kernel.shm_rmid_forced",
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"net.ipv4.ip_local_port_range",
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"net.ipv4.tcp_syncookies",
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"net.ipv4.ping_group_range",
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"net.ipv4.ip_unprivileged_port_start",
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)
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sysctlsAllowedV1Dot27 = sysctlsAllowedV1Dot0.Union(sets.NewString(
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"net.ipv4.ip_local_reserved_ports",
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))
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sysctlsAllowedV1Dot29 = sysctlsAllowedV1Dot27.Union(sets.NewString(
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"net.ipv4.tcp_keepalive_time",
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"net.ipv4.tcp_fin_timeout",
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"net.ipv4.tcp_keepalive_intvl",
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"net.ipv4.tcp_keepalive_probes",
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))
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sysctlsAllowedV1Dot32 = sysctlsAllowedV1Dot29.Union(sets.NewString(
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"net.ipv4.tcp_rmem",
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"net.ipv4.tcp_wmem",
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))
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)
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func sysctlsV1Dot0(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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return sysctls(podMetadata, podSpec, sysctlsAllowedV1Dot0)
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}
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func sysctlsV1Dot27(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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return sysctls(podMetadata, podSpec, sysctlsAllowedV1Dot27)
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}
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func sysctlsV1Dot29(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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return sysctls(podMetadata, podSpec, sysctlsAllowedV1Dot29)
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}
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func sysctlsV1Dot32(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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return sysctls(podMetadata, podSpec, sysctlsAllowedV1Dot32)
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}
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func sysctls(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec, sysctls_allowed_set sets.String) CheckResult {
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var forbiddenSysctls []string
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if podSpec.SecurityContext != nil {
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for _, sysctl := range podSpec.SecurityContext.Sysctls {
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if !sysctls_allowed_set.Has(sysctl.Name) {
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forbiddenSysctls = append(forbiddenSysctls, sysctl.Name)
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}
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}
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}
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if len(forbiddenSysctls) > 0 {
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return CheckResult{
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Allowed: false,
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ForbiddenReason: "forbidden sysctls",
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ForbiddenDetail: strings.Join(forbiddenSysctls, ", "),
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}
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}
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return CheckResult{Allowed: true}
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}
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