mirror of
https://github.com/Kicksecure/security-misc.git
synced 2024-12-28 04:39:23 -05:00
137 lines
3.8 KiB
Bash
Executable File
137 lines
3.8 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
## Copyright (C) 2012 - 2023 ENCRYPTED SUPPORT LP <adrelanos@whonix.org>
|
|
## See the file COPYING for copying conditions.
|
|
|
|
#set -x
|
|
set -e
|
|
set -o pipefail
|
|
|
|
if [ "$1" = "all" ]; then
|
|
remove_file="all"
|
|
elif [ ! "$1" = "" ]; then
|
|
remove_file="$1"
|
|
else
|
|
echo "ERROR: need to give parameter 'all' or a filename.
|
|
|
|
examples:
|
|
|
|
$0 all
|
|
|
|
$0 /usr/bin/newgrp
|
|
" >&2
|
|
fi
|
|
|
|
exit_code=0
|
|
|
|
dpkg_admindir_parameter_existing_mode="--admindir /var/lib/permission-hardening/existing_mode"
|
|
dpkg_admindir_parameter_new_mode="--admindir /var/lib/permission-hardening/new_mode"
|
|
|
|
undo_permission_hardening() {
|
|
if [ ! -f /var/lib/permission-hardening/existing_mode/statoverride ]; then
|
|
return 0
|
|
fi
|
|
|
|
local line
|
|
|
|
while read -r line; do
|
|
## example line:
|
|
## root root 4755 /usr/lib/eject/dmcrypt-get-device
|
|
|
|
local owner group mode file_name
|
|
if ! read -r owner group mode file_name <<< "$line" ; then
|
|
exit_code=201
|
|
echo "ERROR: cannot parse line: $line" >&2
|
|
continue
|
|
fi
|
|
true "owner: '$owner' group: '$group' mode: '$mode' file_name: '$file_name'"
|
|
|
|
if [ "$remove_file" = "all" ]; then
|
|
do_proceed=true
|
|
verbose_maybe=""
|
|
else
|
|
if [ "$remove_file" = "$file_name" ]; then
|
|
do_proceed=true
|
|
verbose_maybe="--verbose"
|
|
remove_one=true
|
|
else
|
|
do_proceed=false
|
|
verbose_maybe=""
|
|
fi
|
|
fi
|
|
|
|
if [ "$do_proceed" = "false" ]; then
|
|
continue
|
|
fi
|
|
|
|
if [ "$remove_one" = "true" ]; then
|
|
set -x
|
|
fi
|
|
|
|
if test -e "$file_name" ; then
|
|
chown $verbose_maybe "${owner}:${group}" "$file_name" || exit_code=202
|
|
## chmod need to be run after chown since chown removes suid.
|
|
## https://unix.stackexchange.com/questions/53665/chown-removes-setuid-bit-bug-or-feature
|
|
chmod $verbose_maybe "$mode" "$file_name" || exit_code=203
|
|
else
|
|
echo "INFO: file_name: '$file_name' - does not exist. This is likely normal."
|
|
fi
|
|
|
|
dpkg-statoverride --remove "$file_name" &>/dev/null || true
|
|
dpkg-statoverride $dpkg_admindir_parameter_existing_mode --remove "$file_name" &>/dev/null || true
|
|
dpkg-statoverride $dpkg_admindir_parameter_new_mode --remove "$file_name" &>/dev/null || true
|
|
|
|
if [ "$remove_one" = "true" ]; then
|
|
set +x
|
|
break
|
|
fi
|
|
|
|
done < "/var/lib/permission-hardening/existing_mode/statoverride"
|
|
}
|
|
|
|
undo_permission_hardening
|
|
|
|
if [ ! "$remove_file" = "all" ]; then
|
|
if [ ! "$remove_one" = "true" ]; then
|
|
echo "INFO: none removed.
|
|
|
|
File '$remove_file' has not removed from SUID Disabler and Permission Hardener during this invocation of this program.
|
|
|
|
Note: This is expected if already done earlier.
|
|
|
|
Note: This program expects the full path to the file. Example:
|
|
|
|
$0 /usr/bin/newgrp
|
|
|
|
The following syntax will not work:
|
|
|
|
$0 program-name
|
|
|
|
The following example will not work:
|
|
|
|
$0 newgrp
|
|
|
|
To remove all:
|
|
|
|
$0 all
|
|
|
|
This change might not be permanent (because of the permission-hardening.service systemd unit). For full instructions, see:
|
|
https://www.whonix.org/wiki/SUID_Disabler_and_Permission_Hardener
|
|
|
|
To view list of changed by SUID Disabler and Permission Hardener:
|
|
https://www.whonix.org/wiki/SUID_Disabler_and_Permission_Hardener#View_List_of_Permissions_Changed_by_SUID_Disabler_and_Permission_Hardener
|
|
|
|
For re-enabling any specific SUID binary:
|
|
https://www.whonix.org/wiki/SUID_Disabler_and_Permission_Hardener#Re-Enable_Specific_SUID_Binaries
|
|
|
|
For completely disabling SUID Disabler and Permission Hardener:
|
|
https://www.whonix.org/wiki/SUID_Disabler_and_Permission_Hardener#Disable_SUID_Disabler_and_Permission_Hardener"
|
|
fi
|
|
fi
|
|
|
|
if [ ! "$exit_code" = "0" ]; then
|
|
echo "ERROR: Will exit with non-zero exit code: '$exit_code'" >&2
|
|
fi
|
|
|
|
exit "$exit_code"
|