CIS compliance (modprobe.d)

* CIS 1.1.1.1 Ensure mounting of cramfs filesystems is disabled
* CIS 1.1.1.2 Ensure mounting of freevxfs filesystems is disabled
* CIS 1.1.1.3 Ensure mounting of jffs2 filesystems is disabled
* CIS 1.1.1.4 Ensure mounting of hfs filesystems is disabled
* CIS 1.1.1.5 Ensure mounting of hfsplus filesystems is disabled
* CIS 1.1.1.6 Ensure mounting of squashfs filesystems is disabled
* CIS 1.1.1.7 Ensure mounting of udf filesystems is disabled
* CIS 1.1.1.8 Ensure mounting of FAT filesystems is disabled
* CIS 3.5.1 Ensure DCCP is disabled
* CIS 3.5.2 Ensure SCTP is disabled
* CIS 3.5.3 Ensure RDS is disabled
* CIS 3.5.4 Ensure TIPC is disabled

Related-Prod: PROD-20756
Related-Prod: PROD-20757
Related-Prod: PROD-20758
Related-Prod: PROD-20759

Change-Id: I719984829978caf0401e78daaabf1adfb0d1cfdf

metadata/service/system/cis/cis-1-1-1-1.yml

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+# 1.1.1.1 Ensure mounting of cramfs filesystems is disabled
+#
+# Description
+# ===========
+# The cramfs filesystem type is a compressed read-only Linux filesystem
+# embedded in small footprint systems. A cramfs image can be used without
+# having to first decompress the image.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the server. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v cramfs
+#   install /bin/true
+#   # lsmod | grep cramfs
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install cramfs /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          cramfs:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-1-1-1-2.yml

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+# 1.1.1.2 Ensure mounting of freevxfs filesystems is disabled
+#
+# Description
+# ===========
+# The freevxfs filesystem type is a free version of the Veritas type
+# filesystem. This is the primary filesystem type for HP-UX operating systems.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the system. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v freevxfs
+#   install /bin/true
+#   # lsmod | grep freevxfs
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install freevxfs /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          freevxfs:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-1-1-1-3.yml

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+# 1.1.1.3 Ensure mounting of jffs2 filesystems is disabled
+#
+# Description
+# ===========
+# The jffs2 (journaling flash filesystem 2) filesystem type is a
+# log-structured filesystem used in flash memory devices.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the system. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v jffs2
+#   install /bin/true
+#   # lsmod | grep jffs2
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install jffs2 /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          jffs2:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-1-1-1-4.yml

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+# 1.1.1.4 Ensure mounting of hfs filesystems is disabled
+#
+# Description
+# ===========
+# The hfs filesystem type is a hierarchical filesystem that allows
+# you to mount Mac OS filesystems.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the system. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v hfs
+#   install /bin/true
+#   # lsmod | grep hfs
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install hfs /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          hfs:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-1-1-1-5.yml

@@ -0,0 +1,36 @@
+# 1.1.1.5 Ensure mounting of hfsplus filesystems is disabled
+#
+# Description
+# ===========
+# The hfsplus filesystem type is a hierarchical filesystem designed to
+# replace hfs that allows you to mount Mac OS filesystems.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the system. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v hfsplus
+#   install /bin/true
+#   # lsmod | grep hfsplus
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install hfsplus /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          hfsplus:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-1-1-1-6.yml

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+# 1.1.1.6 Ensure mounting of squashfs filesystems is disabled
+#
+# Description
+# ===========
+# The squashfs filesystem type is a compressed read-only Linux filesystem
+# embedded in small footprint systems (similar to cramfs). A squashfs image
+# can be used without having to first decompress the image.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the server. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v squashfs
+#   install /bin/true
+#   # lsmod | grep squashfs
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install squashfs /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          squashfs:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-1-1-1-7.yml

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+# 1.1.1.7 Ensure mounting of udf filesystems is disabled
+#
+# Description
+# ===========
+# The udf filesystem type is the universal disk format used to implement
+# ISO/IEC 13346 and ECMA-167 specifications. This is an open vendor filesystem
+# type for data storage on a broad range of media. This filesystem type is
+# necessary to support writing DVDs and newer optical disc formats.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the server. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v udf
+#   install /bin/true
+#   # lsmod | grep udf
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install udf /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          udf:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-1-1-1-8.yml

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+# 1.1.1.8 Ensure mounting of FAT filesystems is disabled
+#
+# Description
+# ===========
+# The FAT filesystem format is primarily used on older windows systems and
+# portable USB drives or flash modules. It comes in three types FAT12, FAT16,
+# and FAT32 all of which are supported by the vfat kernel module.
+#
+# Rationale
+# =========
+# Removing support for unneeded filesystem types reduces the local attack
+# surface of the server. If this filesystem type is not needed, disable it.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v vfat
+#   install /bin/true
+#   # lsmod | grep vfat
+#   <No output>
+#
+# Remediation
+# ===========
+#
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install vfat /bin/true
+#
+# Impact
+# ======
+# FAT filesystems are often used on portable USB sticks and other flash
+# media are commonly used to transfer files between workstations, removing
+# VFAT support may prevent the ability to transfer files in this way.
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          vfat:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-3-5-1.yml

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+# 3.5.2 Ensure SCTP is disabled
+#
+# Description
+# ===========
+# The Datagram Congestion Control Protocol (DCCP) is a transport layer protocol
+# that supports streaming media and telephony. DCCP provides a way to gain
+# access to congestion control, without having to do it at the application
+# layer, but does not provide in-sequence delivery.
+#
+# Rationale
+# =========
+# If the protocol is not required, it is recommended that the drivers not be
+# installed to reduce the potential attack surface.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v dccp
+#   install /bin/true
+#   # lsmod | grep dccp
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install dccp /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          dccp:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-3-5-2.yml

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+# 3.5.2 Ensure SCTP is disabled
+#
+# Description
+# ===========
+# The Stream Control Transmission Protocol (SCTP) is a transport layer
+# protocol used to support message oriented communication, with several
+# streams of messages in one connection. It serves a similar function as
+# TCP and UDP, incorporating features of both. It is message-oriented
+# like UDP, and ensures reliable in-sequence transport of messages with
+# congestion control like TCP.
+#
+# Rationale
+# =========
+# If the protocol is not being used, it is recommended that kernel module
+# not be loaded, disabling the service to reduce the potential attack surface.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v sctp
+#   install /bin/true
+#   # lsmod | grep sctp
+#   <No output>
+#
+# Remediation
+# ===========
+#
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install sctp /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          sctp:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-3-5-3.yml

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+# 3.5.3 Ensure RDS is disabled
+#
+# Description
+# ===========
+# The Reliable Datagram Sockets (RDS) protocol is a transport layer protocol
+# designed to provide low-latency, high-bandwidth communications between
+# cluster nodes. It was developed by the Oracle Corporation.
+#
+# Rationale
+# =========
+# If the protocol is not being used, it is recommended that kernel module
+# not be loaded, disabling the service to reduce the potential attack surface.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v rds
+#   install /bin/true
+#   # lsmod | grep rds
+#   <No output>
+#
+# Remediation
+# ===========
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install rds /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          rds:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/cis-3-5-4.yml

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+# 3.5.4 Ensure TIPC is disabled
+#
+# Description
+# ===========
+# The Transparent Inter-Process Communication (TIPC) protocol is designed
+# to provide communication between cluster nodes.
+#
+# Rationale
+# =========
+# If the protocol is not being used, it is recommended that kernel module
+# not be loaded, disabling the service to reduce the potential attack surface.
+#
+# Audit
+# =====
+# Run the following commands and verify the output is as indicated:
+#
+#   # modprobe -n -v tipc
+#   install /bin/true
+#   # lsmod | grep tipc
+#   <No output>
+#
+# Remediation
+# ===========
+#
+# Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
+#
+#   install tipc /bin/true
+#
+parameters:
+  linux:
+    system:
+      kernel:
+        module:
+          tipc:
+            install:
+              command: /bin/true
+

metadata/service/system/cis/init.yml

@@ -1,2 +1,14 @@
 classes:
+- service.linux.system.cis.cis-1-1-1-1.yml
+- service.linux.system.cis.cis-1-1-1-2.yml
+- service.linux.system.cis.cis-1-1-1-3.yml
+- service.linux.system.cis.cis-1-1-1-4.yml
+- service.linux.system.cis.cis-1-1-1-5.yml
+- service.linux.system.cis.cis-1-1-1-6.yml
+- service.linux.system.cis.cis-1-1-1-7.yml
+- service.linux.system.cis.cis-1-1-1-8.yml
 - service.linux.system.cis.cis-3-3-3
+- service.linux.system.cis.cis-3-5-1
+- service.linux.system.cis.cis-3-5-2
+- service.linux.system.cis.cis-3-5-3
+- service.linux.system.cis.cis-3-5-4