Linux distributions
TMA-ALMA8-3.2.2
Ensure can kernel module is not available
Açıklama
The Controller Area Network (CAN) is a serial communications protocol, which was initially developed for automotive and is now also used in marine, industrial, and medical applications. Disabling CAN protects the system against exploitation of any flaws in its implementation.
Nasıl denetlenir
Denetim yöntemi: Kabuk komutu
m=can; found=$(find /lib/modules/$(uname -r)/kernel /usr/lib/modules/$(uname -r)/kernel -path "*/can*" 2>/dev/null | head -n1); if [ -z "$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- Beklenen çıktı
compliant
Nasıl düzeltilir
Düzeltme yöntemi: Kılavuz veya altyapı yaması
Unload and disable the can kernel module. 1. Run the following commands to unload the can kernel module: # modprobe -r can 2>/dev/null # rmmod can 2>/dev/null 2. Perform the following to disable the can kernel module: Create a file ending in .conf with install can /bin/false in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "install can /bin/false" >> /etc/modprobe.d/60-can.conf Create a file ending in .conf with blacklist can in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "blacklist can" >> /etc/modprobe.d/60-can.conf
Özellikler
- İşletim sistemleri
- almalinux-8
- Etiketler
- cis-convertedkernellinuxmodules
- Referans
- CIS AlmaLinux OS 8 Benchmark v4.0.0 - 3.2.2
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tmaegis scan --target linux