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Azure Container Linux

TMA-AZURE-CONTAINER-LINUX-1.1.1.1

Ensure cramfs kernel module is not available

MittelStufe 1Automatisiertazure-container-linux

Beschreibung

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.

So wird geprüft

Prüfmethode: Shell-Befehl

shell
m=cramfs; found=$(find /lib/modules/$(uname -r)/kernel /usr/lib/modules/$(uname -r)/kernel -path "*/cramfs*" 2>/dev/null | head -n1); if [ -z "$found" ]; then echo compliant; exit 0; fi; lsmod | awk '{print $1}' | grep -Fxq -- "${m//-/_}" && { echo "$m is loaded"; exit 0; }; cfg=$(modprobe --showconfig 2>/dev/null); printf '%s\n' "$cfg" | grep -Pq -- "^\h*blacklist\h+${m//-/_}\b" || { echo "$m is not blacklisted"; exit 0; }; printf '%s\n' "$cfg" | grep -Pq -- "^\h*install\h+${m//-/_}\h+(/usr)?/bin/(true|false)\b" || { echo "$m install is not disabled"; exit 0; }; echo compliant
Erwartete Ausgabe
compliant

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

Run the following to unload and disable the cramfs kernel module. Run the following commands to unload the cramfs kernel module: # modprobe -r cramfs 2>/dev/null # rmmod cramfs 2>/dev/null Perform the following to disable the cramfs kernel module: Create a file ending in .conf with install cramfs /bin/false in the /etc/modprobe.d/ directory. Example: printf '%s\n' "" "install cramfs /bin/false" >> /etc/modprobe.d/cramfs.conf Create a file ending in .conf with blacklist cramfs in the /etc/modprobe.d/ directory. Example: printf '%s\n' "" "blacklist cramfs" >> /etc/modprobe.d/cramfs.conf

Eigenschaften

Betriebssysteme
Beliebig
Tags
azure-container-linuxcis-convertedkernelmodules
Referenz
CIS Azure Container Linux Benchmark v1.0.0 - 1.1.1.1 Ensure cramfs kernel module is not available

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