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https://github.com/ovh/debian-cis.git
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102 lines
3.2 KiB
Bash
Executable File
102 lines
3.2 KiB
Bash
Executable File
#!/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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# 6.2.9 Ensure users own their home directories (Scored)
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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 users own their home directories"
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EXCEPTIONS=""
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ERRORS=0
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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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debug "Checking homedir exists"
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RESULT=$(get_db passwd | awk -F: '{ print $1 ":" $3 ":" $6 }')
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for LINE in $RESULT; do
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debug "Working on $LINE"
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USER=$(awk -F: '{print $1}' <<<"$LINE")
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USERID=$(awk -F: '{print $2}' <<<"$LINE")
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DIR=$(awk -F: '{print $3}' <<<"$LINE")
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if [ "$USERID" -ge 1000 ] && [ ! -d "$DIR" ] && [ "$USER" != "nfsnobody" ] && [ "$USER" != "nobody" ] && [ "$DIR" != "/nonexistent" ]; then
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crit "The home directory ($DIR) of user $USER does not exist."
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ERRORS=$((ERRORS + 1))
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fi
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done
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if [ "$ERRORS" = 0 ]; then
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ok "All home directories exists"
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fi
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debug "Checking homedir ownership"
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RESULT=$(awk -F: '{ print $1 ":" $3 ":" $6 }' /etc/passwd)
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for LINE in $RESULT; do
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debug "Working on $LINE"
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USER=$(awk -F: '{print $1}' <<<"$LINE")
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USERID=$(awk -F: '{print $2}' <<<"$LINE")
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DIR=$(awk -F: '{print $3}' <<<"$LINE")
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if [ "$USERID" -ge 500 ] && [ -d "$DIR" ] && [ "$USER" != "nfsnobody" ]; then
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OWNER=$(stat -L -c "%U" "$DIR")
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if [ "$OWNER" != "$USER" ]; then
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EXCEP_FOUND=0
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for excep in $EXCEPTIONS; do
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if [ "$DIR:$USER:$OWNER" = "$excep" ]; then
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ok "The home directory ($DIR) of user $USER is owned by $OWNER but is part of exceptions ($DIR:$USER:$OWNER)."
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EXCEP_FOUND=1
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break
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fi
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done
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if [ "$EXCEP_FOUND" -eq 0 ]; then
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crit "The home directory ($DIR) of user $USER is owned by $OWNER."
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ERRORS=$((ERRORS + 1))
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fi
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fi
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fi
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done
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if [ "$ERRORS" = 0 ]; then
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ok "All home directories have correct ownership"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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info "Modifying home directories may seriously harm your system, report only here"
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_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_ROOT_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 "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "$CIS_ROOT_DIR"/lib/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_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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