Ensure sctp kernel module is not available

낮음레벨 2자동linux

설명

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.

점검 방법

감사 방식: 셸 명령

shell

m=sctp; found=$(find /lib/modules/$(uname -r)/kernel /usr/lib/modules/$(uname -r)/kernel -path "*/sctp*" 2>/dev/null | head -n1); if [ -z "$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

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Run the following to unload and disable the sctp kernel module. This can also be done by running the script included below. Run the following commands to unload the sctp kernel module: # modprobe -r sctp 2>/dev/null # rmmod sctp 2>/dev/null Perform the following to disable the sctp kernel module: Create a file ending in .conf with install sctp /bin/false in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "install sctp /bin/false" >> sctp.conf Create a file ending in .conf with blacklist sctp in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "blacklist sctp" >> sctp.conf Optional remediation script: This script will perform the above remediation as required by the system …

속성

운영 체제: ubuntu-20.04
태그: cis-convertedkernellinuxmodules
참고 자료: CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 - 3.2.4

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shell

tmaegis scan --target linux --level 2