mirror of
https://github.com/Kicksecure/security-misc.git
synced 2024-12-26 18:29:24 -05:00
refactoring
This commit is contained in:
Patrick Schleizer
parent
7aea304549
commit
b631e2ecd8
@ -209,198 +209,197 @@ add_nosuid_statoverride_entry() {
|
||||
}
|
||||
|
||||
set_file_perms() {
|
||||
echo "INFO: START parsing config_file: '$config_file'"
|
||||
local line
|
||||
while read -r line; do
|
||||
if [ "$line" = "" ]; then
|
||||
continue
|
||||
fi
|
||||
|
||||
if [[ "$line" =~ ^# ]]; then
|
||||
continue
|
||||
fi
|
||||
|
||||
if [[ "$line" =~ [0-9a-zA-Z/] ]]; then
|
||||
true "OK line contains only white listed characters."
|
||||
else
|
||||
exit_code=200
|
||||
echo "ERROR: cannot parse line with invalid character: $line" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
#global fso
|
||||
local mode_from_config owner_from_config group_from_config capability_from_config
|
||||
if ! read -r fso mode_from_config owner_from_config group_from_config capability_from_config <<< "$line" ; then
|
||||
exit_code=201
|
||||
echo "ERROR: cannot parse line: $line" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
local fso_without_trailing_slash
|
||||
fso_without_trailing_slash="${fso%/}"
|
||||
|
||||
if [ "$mode_from_config" = "whitelist" ]; then
|
||||
## TODO: test/add white spaces inside file name support
|
||||
whitelist+="$fso_without_trailing_slash "
|
||||
continue
|
||||
fi
|
||||
|
||||
if [ "$mode_from_config" = "matchwhitelist" ]; then
|
||||
## TODO: test/add white spaces inside file name support
|
||||
matchwhitelist+="$fso "
|
||||
continue
|
||||
fi
|
||||
|
||||
if ! [ -e "$fso" ]; then
|
||||
echo "INFO: fso: '$fso' - does not exist. This is likely normal."
|
||||
continue
|
||||
fi
|
||||
|
||||
## Use dpkg-statoverride so permissions are not reset during upgrades.
|
||||
|
||||
if [ "$mode_from_config" = "nosuid" ]; then
|
||||
## If mode_from_config is "nosuid" the config does not set owner and
|
||||
## group. Therefore do not enforce owner/group check.
|
||||
|
||||
add_nosuid_statoverride_entry
|
||||
else
|
||||
local string_length_of_mode_from_config
|
||||
string_length_of_mode_from_config="${#mode_from_config}"
|
||||
if [ "$string_length_of_mode_from_config" -gt "4" ]; then
|
||||
echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$string_length_of_mode_from_config" -lt "3" ]; then
|
||||
echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
|
||||
echo "INFO: START parsing config_file: '$config_file'"
|
||||
local line
|
||||
while read -r line; do
|
||||
if [ "$line" = "" ]; then
|
||||
continue
|
||||
fi
|
||||
|
||||
if ! getent passwd | grep -q "^${owner_from_config}:" ; then
|
||||
echo "ERROR: owner_from_config '$owner_from_config' does not exist!" >&2
|
||||
if [[ "$line" =~ ^# ]]; then
|
||||
continue
|
||||
fi
|
||||
|
||||
if ! getent group | grep -q "^${group_from_config}:" ; then
|
||||
echo "ERROR: group_from_config '$group_from_config' does not exist!" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
local mode_for_grep
|
||||
mode_for_grep="$mode_from_config"
|
||||
first_character_of_mode_from_config="${mode_from_config::1}"
|
||||
if [ "$first_character_of_mode_from_config" = "0" ]; then
|
||||
## Remove leading '0'.
|
||||
mode_for_grep="${mode_from_config:1}"
|
||||
fi
|
||||
|
||||
local stat_output
|
||||
stat_output=""
|
||||
if ! stat_output="$(stat -c "%n %a %U %G" "$fso_without_trailing_slash")" ; then
|
||||
echo "ERROR: failed to run 'stat' for fso_without_trailing_slash: '$fso_without_trailing_slash'!" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
local arr file_name existing_mode existing_owner existing_group
|
||||
arr=($stat_output)
|
||||
file_name="${arr[0]}"
|
||||
existing_mode="${arr[1]}"
|
||||
existing_owner="${arr[2]}"
|
||||
existing_group="${arr[3]}"
|
||||
|
||||
if [ "$arr" = "" ]; then
|
||||
echo "ERROR: arr is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$file_name" = "" ]; then
|
||||
echo "ERROR: file_name is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$existing_mode" = "" ]; then
|
||||
echo "ERROR: existing_mode is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$existing_owner" = "" ]; then
|
||||
echo "ERROR: existing_owner is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$existing_group" = "" ]; then
|
||||
echo "ERROR: $existing_group is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
## Check there is an entry for the fso.
|
||||
##
|
||||
## example: dpkg-statoverride --list | grep /home
|
||||
## output:
|
||||
## root root 755 /home
|
||||
##
|
||||
## dpkg-statoverride does not show leading '0'.
|
||||
if dpkg-statoverride --list "$fso_without_trailing_slash" >/dev/null ; then
|
||||
true "There is an fso entry. Check if owner/group/mode match."
|
||||
if dpkg-statoverride --list | grep -q "$owner_from_config $group_from_config $mode_for_grep $fso_without_trailing_slash" ; then
|
||||
true "OK The owner/group/mode matches. No further action required."
|
||||
else
|
||||
true "The owner/group/mode do not match, therefore remove and re-add the entry to update it."
|
||||
## fso_without_trailing_slash instead of fso to prevent
|
||||
## "dpkg-statoverride: warning: stripping trailing /"
|
||||
|
||||
if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
|
||||
true "OK Existing mode already saved previously. No need to save again."
|
||||
else
|
||||
## Save existing_mode in separate database.
|
||||
## Not using --update as not intending to enforce existing_mode.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
|
||||
fi
|
||||
|
||||
echo_wrapper_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --remove "$fso_without_trailing_slash"
|
||||
|
||||
## Remove from and add to real database.
|
||||
echo_wrapper_audit dpkg-statoverride --remove "$fso_without_trailing_slash"
|
||||
echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
|
||||
## Save in separate database.
|
||||
## Not using --update as this is only for saving.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
fi
|
||||
if [[ "$line" =~ [0-9a-zA-Z/] ]]; then
|
||||
true "OK line contains only white listed characters."
|
||||
else
|
||||
true "There is no fso entry. Therefore add one."
|
||||
|
||||
if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
|
||||
true "OK Existing mode already saved previously. No need to save again."
|
||||
else
|
||||
## Save existing_mode in separate database.
|
||||
## Not using --update as not intending to enforce existing_mode.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
|
||||
fi
|
||||
|
||||
## Add to real database.
|
||||
echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
|
||||
## Save in separate database.
|
||||
## Not using --update as this is only for saving.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ "$capability_from_config" = "" ]; then
|
||||
continue
|
||||
fi
|
||||
|
||||
if [ "$capability_from_config" = "none" ]; then
|
||||
# sudo setcap -r /usr/bin/ping
|
||||
# Failed to set capabilities on file `/usr/bin/ping' (No data available)
|
||||
# The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file
|
||||
echo_wrapper_audit setcap -r "$fso"
|
||||
else
|
||||
if ! capsh --print | grep "Bounding set" | grep -q "$capability_from_config" ; then
|
||||
echo "ERROR: capability_from_config '$capability_from_config' does not exist!" >&2
|
||||
exit_code=200
|
||||
echo "ERROR: cannot parse line with invalid character: $line" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
echo_wrapper_audit setcap "${capability_from_config}+ep" "$fso"
|
||||
fi
|
||||
done < "$config_file"
|
||||
echo "INFO: END parsing config_file: '$config_file'"
|
||||
#global fso
|
||||
local mode_from_config owner_from_config group_from_config capability_from_config
|
||||
if ! read -r fso mode_from_config owner_from_config group_from_config capability_from_config <<< "$line" ; then
|
||||
exit_code=201
|
||||
echo "ERROR: cannot parse line: $line" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
local fso_without_trailing_slash
|
||||
fso_without_trailing_slash="${fso%/}"
|
||||
|
||||
if [ "$mode_from_config" = "whitelist" ]; then
|
||||
## TODO: test/add white spaces inside file name support
|
||||
whitelist+="$fso_without_trailing_slash "
|
||||
continue
|
||||
fi
|
||||
|
||||
if [ "$mode_from_config" = "matchwhitelist" ]; then
|
||||
## TODO: test/add white spaces inside file name support
|
||||
matchwhitelist+="$fso "
|
||||
continue
|
||||
fi
|
||||
|
||||
if ! [ -e "$fso" ]; then
|
||||
echo "INFO: fso: '$fso' - does not exist. This is likely normal."
|
||||
continue
|
||||
fi
|
||||
|
||||
## Use dpkg-statoverride so permissions are not reset during upgrades.
|
||||
|
||||
if [ "$mode_from_config" = "nosuid" ]; then
|
||||
## If mode_from_config is "nosuid" the config does not set owner and
|
||||
## group. Therefore do not enforce owner/group check.
|
||||
|
||||
add_nosuid_statoverride_entry
|
||||
else
|
||||
local string_length_of_mode_from_config
|
||||
string_length_of_mode_from_config="${#mode_from_config}"
|
||||
if [ "$string_length_of_mode_from_config" -gt "4" ]; then
|
||||
echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$string_length_of_mode_from_config" -lt "3" ]; then
|
||||
echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
if ! getent passwd | grep -q "^${owner_from_config}:" ; then
|
||||
echo "ERROR: owner_from_config '$owner_from_config' does not exist!" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
if ! getent group | grep -q "^${group_from_config}:" ; then
|
||||
echo "ERROR: group_from_config '$group_from_config' does not exist!" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
local mode_for_grep
|
||||
mode_for_grep="$mode_from_config"
|
||||
first_character_of_mode_from_config="${mode_from_config::1}"
|
||||
if [ "$first_character_of_mode_from_config" = "0" ]; then
|
||||
## Remove leading '0'.
|
||||
mode_for_grep="${mode_from_config:1}"
|
||||
fi
|
||||
|
||||
local stat_output
|
||||
stat_output=""
|
||||
if ! stat_output="$(stat -c "%n %a %U %G" "$fso_without_trailing_slash")" ; then
|
||||
echo "ERROR: failed to run 'stat' for fso_without_trailing_slash: '$fso_without_trailing_slash'!" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
local arr file_name existing_mode existing_owner existing_group
|
||||
arr=($stat_output)
|
||||
file_name="${arr[0]}"
|
||||
existing_mode="${arr[1]}"
|
||||
existing_owner="${arr[2]}"
|
||||
existing_group="${arr[3]}"
|
||||
|
||||
if [ "$arr" = "" ]; then
|
||||
echo "ERROR: arr is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$file_name" = "" ]; then
|
||||
echo "ERROR: file_name is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$existing_mode" = "" ]; then
|
||||
echo "ERROR: existing_mode is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$existing_owner" = "" ]; then
|
||||
echo "ERROR: existing_owner is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
if [ "$existing_group" = "" ]; then
|
||||
echo "ERROR: $existing_group is empty. stat_output: '$stat_output' | line: '$line'" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
## Check there is an entry for the fso.
|
||||
##
|
||||
## example: dpkg-statoverride --list | grep /home
|
||||
## output:
|
||||
## root root 755 /home
|
||||
##
|
||||
## dpkg-statoverride does not show leading '0'.
|
||||
if dpkg-statoverride --list "$fso_without_trailing_slash" >/dev/null ; then
|
||||
true "There is an fso entry. Check if owner/group/mode match."
|
||||
if dpkg-statoverride --list | grep -q "$owner_from_config $group_from_config $mode_for_grep $fso_without_trailing_slash" ; then
|
||||
true "OK The owner/group/mode matches. No further action required."
|
||||
else
|
||||
true "The owner/group/mode do not match, therefore remove and re-add the entry to update it."
|
||||
## fso_without_trailing_slash instead of fso to prevent
|
||||
## "dpkg-statoverride: warning: stripping trailing /"
|
||||
|
||||
if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
|
||||
true "OK Existing mode already saved previously. No need to save again."
|
||||
else
|
||||
## Save existing_mode in separate database.
|
||||
## Not using --update as not intending to enforce existing_mode.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
|
||||
fi
|
||||
|
||||
echo_wrapper_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --remove "$fso_without_trailing_slash"
|
||||
|
||||
## Remove from and add to real database.
|
||||
echo_wrapper_audit dpkg-statoverride --remove "$fso_without_trailing_slash"
|
||||
echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
|
||||
## Save in separate database.
|
||||
## Not using --update as this is only for saving.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
fi
|
||||
else
|
||||
true "There is no fso entry. Therefore add one."
|
||||
|
||||
if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
|
||||
true "OK Existing mode already saved previously. No need to save again."
|
||||
else
|
||||
## Save existing_mode in separate database.
|
||||
## Not using --update as not intending to enforce existing_mode.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
|
||||
fi
|
||||
|
||||
## Add to real database.
|
||||
echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
|
||||
## Save in separate database.
|
||||
## Not using --update as this is only for saving.
|
||||
echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
|
||||
fi
|
||||
fi
|
||||
if [ "$capability_from_config" = "" ]; then
|
||||
continue
|
||||
fi
|
||||
|
||||
if [ "$capability_from_config" = "none" ]; then
|
||||
# sudo setcap -r /usr/bin/ping
|
||||
# Failed to set capabilities on file `/usr/bin/ping' (No data available)
|
||||
# The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file
|
||||
echo_wrapper_audit setcap -r "$fso"
|
||||
else
|
||||
if ! capsh --print | grep "Bounding set" | grep -q "$capability_from_config" ; then
|
||||
echo "ERROR: capability_from_config '$capability_from_config' does not exist!" >&2
|
||||
continue
|
||||
fi
|
||||
|
||||
echo_wrapper_audit setcap "${capability_from_config}+ep" "$fso"
|
||||
fi
|
||||
done < "$config_file"
|
||||
echo "INFO: END parsing config_file: '$config_file'"
|
||||
}
|
||||
|
||||
parse_config_folder() {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user