Ensure mounting of cramfs filesystems is disabled

中等級 1自動化ros

說明

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. The audit requires the cramfs module to be unloaded and blocked (modprobe -n -v reports install /bin/true). Host-level control from the CIS ROS Melodic benchmark (Ubuntu 18.04 robot hosts); run as root.

檢查方式

稽核方法: Shell 指令

shell

command -v modprobe >/dev/null 2>&1 || exit 1
grep -qw '^cramfs' /proc/modules 2>/dev/null && { echo 'cramfs is loaded'; exit 1; }
cfg=$(modprobe -n -v cramfs 2>&1)
case "$cfg" in *'install /bin/true'*|*'install /bin/false'*|*'not found'*) echo compliant; exit 0 ;; esac
modprobe --showconfig 2>/dev/null | grep -Eq '^\s*install\s+cramfs\s+/bin/(true|false)' && echo compliant || echo 'cramfs can be loaded'

預期輸出: compliant

修補方式

修補方法: 操作指南或基礎設施修補檔

Edit or create a file in the /etc/modprobe.d/ directory ending in .conf Example: vi /etc/modprobe.d/cramfs.conf and add the following line: install cramfs /bin/true Run the following command to unload the cramfs module: # rmmod cramfs

屬性

作業系統: 不限
標籤: rosros1melodicsystem
參考資料: CIS ROS Melodic Benchmark v1.0.0 - 1.1.1.1 Ensure mounting of cramfs filesystems is disabled

檢查此主機

請在您有權稽核的機器上執行此指令。掃描為唯讀操作。

shell

tmaegis scan --target ros