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feat: add debian12 scripts (#290)
- at_is_restricted.sh -> 2.4.2.1 - wireless_interfaces_disabled.sh -> 3.1.2 - bluetooth_is_disabled.sh -> 3.1.3 - sudo_no_nopasswd.sh -> 5.2.4 - aide_is_installed.sh -> 6.1.1 Co-authored-by: damien cavagnini <damien.cavagnini@corp.ovh.com>
This commit is contained in:
damcav35
163
bin/hardening/at_is_restricted.sh
Executable file
163
bin/hardening/at_is_restricted.sh
Executable file
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#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# Ensure at is restricted to authorized users (Automated)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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HARDENING_LEVEL=2
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# shellcheck disable=2034
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DESCRIPTION="Ensure at is restricted to authorized users"
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PACKAGE="at"
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# This function will be called if the script status is on enabled / audit mode
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audit() {
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ALLOW_EXISTS=1
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ALLOW_VALID=0
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DENY_EXISTS=1
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DENY_EMPTY=1
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DENY_VALID=0
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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" -eq 1 ]; then
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ok "$PACKAGE is not installed"
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else
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does_file_exist "/etc/at.allow"
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if [ "$FNRET" -eq 0 ]; then
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ALLOW_EXISTS=0
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# valid if file:
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# - Exists
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# - Is mode 0640 or more restrictive
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# - Is owned by the user root
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# - Is group owned by the group daemon or group root
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if [ "$(stat -Lc '%U' /etc/at.allow)" != 'root' ]; then
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ALLOW_VALID=1
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crit "'/etc/at.allow' is not owned by root"
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fi
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group="$(stat -Lc '%G' /etc/at.allow)"
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if [ "$group" != 'root' ] && [ "$group" != 'daemon' ]; then
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ALLOW_VALID=1
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crit "'/etc/at.allow' is not owned by group root or group 'daemon'"
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fi
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if [ "$(stat -Lc '%a' /etc/at.allow)" != '640' ]; then
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ALLOW_VALID=1
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crit "'/etc/at.allow' perms is not '640'"
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fi
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fi
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does_file_exist "/etc/at.deny"
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if [ "$FNRET" -eq 0 ]; then
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DENY_EXISTS=0
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is_file_empty "/etc/at.deny"
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if [ "$FNRET" -eq 0 ]; then
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DENY_EMPTY=0
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fi
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if [ "$(stat -Lc '%U' /etc/at.deny)" != 'root' ]; then
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DENY_VALID=1
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crit "'/etc/at.deny' is not owned by root"
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fi
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group="$(stat -Lc '%G' /etc/at.deny)"
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if [ "$group" != 'root' ] && [ "$group" != 'daemon' ]; then
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DENY_VALID=1
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crit "'/etc/at.deny' is not owned by group 'root' or group 'daemon'"
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fi
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if [ "$(stat -Lc '%a' /etc/at.deny)" != '640' ]; then
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DENY_VALID=1
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crit "'/etc/at.deny' perms is not '640'"
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fi
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fi
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# If neither /etc/at.allow and /etc/at.deny exist, only the superuser is allowed to use at.
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if [ "$ALLOW_EXISTS" -eq 1 ] && [ "$DENY_EXISTS" -eq 1 ]; then
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ok "only superuser is allowed to run 'at' commands"
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# If /etc/at.allow does not exist, /etc/at.deny is checked, every username not mentioned in it is then allowed to use at.
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# An empty /etc/at.deny means that every user may use at.
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elif [ "$ALLOW_EXISTS" -eq 1 ] && [ "$DENY_EXISTS" -eq 0 ]; then
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if [ "$DENY_EMPTY" -eq 0 ]; then
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crit "all users are allowed to execute 'at' commands"
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elif [ "$DENY_VALID" -eq 1 ]; then
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crit "'/etc/at.deny' exists but is misconfigured"
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else
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ok "'/etc/at.deny' exists and is correctly configured"
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fi
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fi
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# If the file /etc/at.allow exists, only usernames mentioned in it are allowed to use at.
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if [ "$ALLOW_EXISTS" -eq 0 ] && [ "$ALLOW_VALID" -eq 1 ]; then
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crit "'/etc/at.allow' exists but is misconfigured"
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elif [ "$ALLOW_EXISTS" -eq 0 ] && [ "$ALLOW_VALID" -eq 0 ]; then
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ok "'/etc/at.allow' exists and is well configured"
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fi
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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if [ "$ALLOW_EXISTS" -eq 1 ] && [ "$DENY_EXISTS" -eq 0 ]; then
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if [ "$DENY_EMPTY" -eq 0 ]; then
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info "Removing '/etc/at.deny'"
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rm -f /etc/at.deny
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elif [ "$DENY_VALID" -eq 1 ]; then
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info "set perms and owner on '/etc/at.deny'"
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chmod 0640 /etc/at.deny
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chown root /etc/at.deny
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if [ "$(stat -Lc '%G' /etc/at.deny)" != "daemon" ]; then
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chgrp root /etc/at.deny
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fi
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fi
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fi
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if [ "$ALLOW_EXISTS" -eq 0 ] && [ "$ALLOW_VALID" -eq 1 ]; then
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info "set perms and owner on '/etc/at.allow'"
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chmod 0640 /etc/at.allow
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chown root /etc/at.allow
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if [ "$(stat -Lc '%G' /etc/at.allow)" != "daemon" ]; then
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chgrp root /etc/at.allow
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fi
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fi
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_LIB_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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