59 lines
2.5 KiB
Bash
59 lines
2.5 KiB
Bash
#!/usr/bin/env bash
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l_output="" l_output2="" l_output3="" l_dl="" # Unset output variables
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l_mname="dccp" # set module name
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l_mtype="net" # set module type
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#replaced in original script to avoid wildcard
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l_searchloc=$(find $(for dir in /lib/modprobe.d /usr/local/lib/modprobe.d /run/modprobe.d /etc/modprobe.d; do [[ -d "$dir" ]] && echo "$dir"; done) -type f -name "*.conf" 2>/dev/null)
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#replaced in original script to avoid globstar operator
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l_mpath=$(find /lib/modules/ -type d -name $l_mtype)
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l_mpname="$(tr '-' '_' <<<"$l_mname")"
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l_mndir="$(tr '-' '/' <<<"$l_mname")"
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module_loadable_chk() {
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# Check if the module is currently loadable
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l_loadable="$(modprobe -n -v "$l_mname")"
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[ "$(wc -l <<<"$l_loadable")" -gt "1" ] && l_loadable="$(grep -P -- "(^\h*install|\b$l_mname)\b" <<<"$l_loadable")"
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if grep -Pq -- '^\h*install \/bin\/(true|false)' <<<"$l_loadable"; then
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l_output="$l_output\n - module: \"$l_mname\" is not loadable: \"$l_loadable\""
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else
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l_output2="$l_output2\n - module: \"$l_mname\" is loadable: \"$l_loadable\""
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fi
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}
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module_loaded_chk() {
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# Check if the module is currently loaded
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if ! lsmod | grep "$l_mname" >/dev/null 2>&1; then
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l_output="$l_output\n - module: \"$l_mname\" is not loaded"
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else
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l_output2="$l_output2\n - module: \"$l_mname\" is loaded"
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fi
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}
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module_deny_chk() {
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# Check if the module is deny listed
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l_dl="y"
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if modprobe --showconfig | grep -Pq -- '^\h*blacklist\h+'"$l_mpname"'\b'; then
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l_output="$l_output\n - module: \"$l_mname\" is deny listed in: \"$(grep -Pls -- "^\h*blacklist\h+$l_mname\b" $l_searchloc)\""
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else
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l_output2="$l_output2\n - module: \"$l_mname\" is not deny listed"
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fi
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}
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# Check if the module exists on the system
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for l_mdir in $l_mpath; do
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if [ -d "$l_mdir/$l_mndir" ] && [ -n "$(ls -A $l_mdir/$l_mndir)" ]; then
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l_output3="$l_output3\n - \"$l_mdir\""
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[ "$l_dl" != "y" ] && module_deny_chk
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if [ "$l_mdir" = "/lib/modules/$(uname -r)/kernel/$l_mtype" ]; then
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module_loadable_chk
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module_loaded_chk
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fi
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else
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l_output="$l_output\n - module: \"$l_mname\" doesn't exist in \"$l_mdir\""
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fi
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done
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# Report results. If no failures output in l_output2, we pass
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[ -n "$l_output3" ] && echo -e "\n\n -- INFO --\n - module: \"$l_mname\" exists in:$l_output3"
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if [ -z "$l_output2" ]; then
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echo -e "\n- Audit Result:\n ** PASS **\n$l_output\n"
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else
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echo -e "\n- Audit Result:\n ** FAIL **\n - Reason(s) for audit failure:\n$l_output2\n"
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[ -n "$l_output" ] && echo -e "\n- Correctly set:\n$l_output\n"
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fi
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