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Revert to previous check (8.2.4 in old num)
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Thibault Ayanides
parent
6620a82f34
commit
829ee8631f
@ -5,50 +5,113 @@
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#
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#
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# 4.2.2.3 Ensure syslog-ng default file permissions configured (Scored)
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# 4.2.2.3 Create and Set Permissions on syslog-ng Log Files (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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HARDENING_LEVEL=3
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DESCRIPTION="Ensure logfile are created with root:640"
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# Note: this is not exacly the same check as the one described in CIS PDF
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PATTERN='options[[:space:]]*{[[:alnum:] ()_;"\t]*perm\(0640\);'
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# shellcheck disable=2034
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HARDENING_LEVEL=3
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# shellcheck disable=2034
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DESCRIPTION="Create and set permissions on syslog-ng logfiles."
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PERMISSIONS=''
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USER=''
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GROUP=''
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EXCEPTIONS=''
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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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FOUND=0
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FILES="$SYSLOG_BASEDIR/syslog-ng.conf $($SUDO_CMD find -L $SYSLOG_BASEDIR/conf.d/ -type f)"
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FILES=$(grep "file(" "$SYSLOG_BASEDIR"/syslog-ng.conf | grep '"' | cut -d'"' -f 2)
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for FILE in $FILES; do
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does_pattern_exist_in_file_multiline "$FILE" "$PATTERN"
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if [ $FNRET = 0 ]; then
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FOUND=1
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does_file_exist "$FILE"
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if [ "$FNRET" != 0 ]; then
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warn "$FILE does not exist"
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else
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FOUND_EXC=0
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if grep -q "$FILE" <(tr ' ' '\n' <<< "$EXCEPTIONS" | cut -d ":" -f 1); then
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debug "$FILE is found in exceptions"
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debug "Setting special user:group:perm"
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FOUND_EXC=1
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local user_bak="$USER"
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local group_bak="$GROUP"
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local perm_bak="$PERMISSIONS"
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USER="$(tr ' ' '\n' <<< "$EXCEPTIONS" | grep "$FILE" | cut -d':' -f 2)"
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GROUP="$(tr ' ' '\n' <<< "$EXCEPTIONS" | grep "$FILE" | cut -d':' -f 3)"
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PERMISSIONS="$(tr ' ' '\n' <<< "$EXCEPTIONS" | grep "$FILE" | cut -d':' -f 4)"
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fi
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has_file_correct_ownership "$FILE" "$USER" "$GROUP"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct ownership ($USER:$GROUP)"
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else
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crit "$FILE ownership was not set to $USER:$GROUP"
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fi
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has_file_correct_permissions "$FILE" "$PERMISSIONS"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct permissions ($PERMISSIONS)"
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else
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crit "$FILE permissions were not set to $PERMISSIONS"
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fi
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if [ "$FOUND_EXC" = 1 ]; then
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debug "Resetting user:group:perm"
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USER="$user_bak"
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GROUP="$group_bak"
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PERMISSIONS="$perm_bak"
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fi
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fi
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done
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if [ $FOUND = 1 ]; then
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ok "$PATTERN is present in $FILES"
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else
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crit "$PATTERN is not present in $FILES"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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FOUND=0
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FILES="$SYSLOG_BASEDIR/syslog-ng.conf $(find -L $SYSLOG_BASEDIR/conf.d/ -type f)"
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for FILE in $FILES; do
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does_pattern_exist_in_file_multiline "$FILE" "$PATTERN"
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if [ $FNRET = 0 ]; then
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FOUND=1
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does_file_exist "$FILE"
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if [ "$FNRET" != 0 ]; then
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info "$FILE does not exist"
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filedir=$(dirname "${FILE#/var/log/}")
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if [ ! "$filedir" = "." ] && [ ! -d /var/log/"$filedir" ]; then
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debug "Creating /var/log/$filedir for $FILE"
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debug "mkdir -p /var/log/$filedir"
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mkdir -p /var/log/"$filedir"
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fi
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touch "$FILE"
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fi
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FOUND_EXC=0
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if grep "$FILE" <(tr ' ' '\n' <<< "$EXCEPTIONS" | cut -d ":" -f 1); then
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debug "$FILE is found in exceptions"
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debug "Setting special user:group:perm"
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FOUND_EXC=1
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local user_bak="$USER"
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local group_bak="$GROUP"
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local perm_bak="$PERMISSIONS"
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USER="$(tr ' ' '\n' <<< "$EXCEPTIONS" | grep "$FILE" | cut -d':' -f 2)"
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GROUP="$(tr ' ' '\n' <<< "$EXCEPTIONS" | grep "$FILE" | cut -d':' -f 3)"
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PERMISSIONS="$(tr ' ' '\n' <<< "$EXCEPTIONS" | grep "$FILE" | cut -d':' -f 4)"
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fi
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has_file_correct_ownership "$FILE" "$USER" "$GROUP"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct ownership"
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else
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warn "fixing $FILE ownership to $USER:$GROUP"
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chown "$USER":"$GROUP" "$FILE"
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fi
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has_file_correct_permissions "$FILE" "$PERMISSIONS"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct permissions"
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else
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info "fixing $FILE permissions to $PERMISSIONS"
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chmod 0"$PERMISSIONS" "$FILE"
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fi
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if [ "$FOUND_EXC" = 1 ]; then
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debug "Resetting user:group:perm"
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USER="$user_bak"
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GROUP="$group_bak"
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PERMISSIONS="$perm_bak"
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fi
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done
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if [ $FOUND = 1 ]; then
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ok "$PATTERN is present in $FILES"
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else
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crit "$PATTERN is not present in $FILES, please set a remote host to send your logs"
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fi
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}
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# This function will create the config file for this check with default values
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@ -56,12 +119,27 @@ create_config() {
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cat <<EOF
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status=audit
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SYSLOG_BASEDIR='/etc/syslog-ng'
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PERMISSIONS='640'
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USER='root'
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GROUP='adm'
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# Put exceptions here with file:user:group:permissions
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# example: /dev/null:root:root:666
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EXCEPTIONS=''
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EOF
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}
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# This function will check config parameters required
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check_config() {
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:
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does_user_exist "$USER"
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if [ "$FNRET" != 0 ]; then
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crit "$USER does not exist"
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exit 128
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fi
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does_group_exist $GROUP
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if [ "$FNRET" != 0 ]; then
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crit "$GROUP does not exist"
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exit 128
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fi
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}
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# Source Root Dir Parameter
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@ -75,8 +153,9 @@ if [ -z "$CIS_ROOT_DIR" ]; then
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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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. $CIS_ROOT_DIR/lib/main.sh
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if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=/opt/debian-cis/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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