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TMA-ALINUX3-5.1.2

Ensure access to /etc/ssh/sshd_config is configured

Trung bìnhCấp 1Tự độnglinux

Mô tả

The file /etc/ssh/sshd_config, and files ending in .conf in the /etc/ssh/sshd_config.d directory, contain configuration specifications for sshd.

Cách kiểm tra

Phương pháp kiểm tra: Lệnh shell

shell
alt0() { o=$(bash -c '#!/usr/bin/env bash

{
   a_output=(); a_output2=()
   perm_mask='"'"'0177'"'"' && maxperm="$( printf '"'"'%o'"'"' $(( 0777 & ~$perm_mask)) )"
   f_sshd_files_chk()
   {
      while IFS=: read -r l_mode l_user l_group; do
         a_out2=()
         [ $(( $l_mode & $perm_mask )) -gt 0 ] && a_out2+=("    Is mode: \"$l_mode\"" \
         "    should be mode: \"$maxperm\" or more restrictive")
         [ "$l_user" != "root" ] && a_out2+=("    Is owned by \"$l_user\" should be owned by \"root\"")
         [ "$l_group" != "root" ] && a_out2+=("    Is group owned by \"$l_user\" should be group owned by \"root\"")
         if [ "${#a_out2[@]}" -gt "0" ]; then
            a_output2+=("  - File: \"$l_file\":" "${a_out2[@]}")
         else
            a_output+=("  - File: \"$l_file\":" "    Correct: mode ($l_mode), owner ($l_user)" \
            "    and group owner ($l_group) configured")
         fi
      done < <(stat -Lc '"'"'%#a:%U:%G'"'"' "$l_file")
   }
   [ -e "/etc/ssh/sshd_config" ] && l_file="/etc/ssh/sshd_config" && f_sshd_files_chk
   while IFS= read -r -d $'"'"'\0'"'"' l_file; do
      [ -e "$l_file" ] && f_sshd_files_chk
   done < <(find /etc/ssh/sshd_config.d -type f -name '"'"'*.conf'"'"' \( -perm /077 -o ! -user root -o ! -group root \) -print0 2>/dev/null)
   if [ "${#a_output2[@]}" -le 0 ]; then
      printf '"'"'%s\n'"'"' "" "- Audit Result:" "  ** PASS **" "${a_output[@]}" ""
   else
      printf '"'"'%s\n'"'"' "" "- Audit Result:" "  ** FAIL **" " - Reason(s) for audit failure:" "${a_output2[@]}"
      [ "${#a_output[@]}" -gt 0 ] && printf '"'"'%s\n'"'"' "" "- Correctly set:" "${a_output[@]}" ""
   fi
}' 2>&1); printf '%s\n' "$o" | grep -q '\*\* PASS \*\*' || { echo "step1: script did not report PASS"; return 1; }; }; if alt0; then echo compliant; fi
Đầu ra mong đợi
compliant

Cách khắc phục

Phương pháp khắc phục: Hướng dẫn hoặc bản vá hạ tầng

Run the following script to set ownership and permissions on /etc/ssh/sshd_config and files ending in .conf in the /etc/ssh/sshd_config.d directory: #!/usr/bin/env bash { chmod u-x,og-rwx /etc/ssh/sshd_config chown root:root /etc/ssh/sshd_config while IFS= read -r -d $'\0' l_file; do if [ -e "$l_file" ]; then chmod u-x,og-rwx "$l_file" chown root:root "$l_file" fi done < <(find /etc/ssh/sshd_config.d -type f -print0 2>/dev/null) } - IF - other locations are listed in an Include statement, *.conf files in these locations access should also be modified.

Thuộc tính

Hệ điều hành
alinux-3
Thẻ
cis-convertedlinux
Tham chiếu
CIS Alibaba Cloud Linux 3 Benchmark v2.0.0 - 5.1.2

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shell
tmaegis scan --target linux