Ensure address space layout randomization (ASLR) is enabled

中等級 1自動化ros

說明

Address space layout randomization (ASLR) is an exploit mitigation technique which randomly arranges the address space of key data areas of a process. The audit requires the running value and the persisted sysctl setting to be 2. 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

bad=0
chk() { case $1 in net.ipv6.*) [ -d /proc/sys/net/ipv6 ] || return 0 ;; esac
  v=$(sysctl -n "$1" 2>/dev/null) || { echo "$1: not readable"; bad=1; return; }
  [ "$v" = "$2" ] || { echo "$1 = $v (expected $2)"; bad=1; }
  p=$(awk -F= -v k="$1" '{gsub(/^[ \t]+|[ \t]+$/, "", $1)} $1 == k {v = $2} END {gsub(/[ \t]/, "", v); print v}' /etc/sysctl.conf /etc/sysctl.d/*.conf /run/sysctl.d/*.conf /usr/lib/sysctl.d/*.conf 2>/dev/null)
  [ "$p" = "$2" ] || { echo "$1 not persisted as $2 in sysctl configuration (${p:-unset})"; bad=1; }; }
chk kernel.randomize_va_space 2
[ "$bad" -eq 0 ] && echo compliant

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

Set the following parameter in /etc/sysctl.conf or a /etc/sysctl.d/* file: kernel.randomize_va_space = 2 Run the following command to set the active kernel parameter: # sysctl -w kernel.randomize_va_space=2

屬性

作業系統: 不限
標籤: rosros1melodicsystem
參考資料: CIS ROS Melodic Benchmark v1.0.0 - 1.6.2 Ensure address space layout randomization (ASLR) is enabled

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