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Merge pull request #888 from RaspAP/bugfix/security

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Bugfix: command injection vulnerabilities
This commit is contained in:
Bill Zimmerman 2021-05-10 10:55:45 +02:00 committed by GitHub
parent 5a7b774598 4841d9336a
commit 061d01cbd5
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 25 additions and 22 deletions
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2
ajax/networking/get_netcfg.php
View file

@ -7,7 +7,7 @@ $interface = $_GET['iface'];
if (isset($interface)) {
// fetch dnsmasq.conf settings for interface
exec('cat '. RASPI_DNSMASQ_PREFIX.$interface.'.conf', $return);
exec('cat '. escapeshellarg(RASPI_DNSMASQ_PREFIX.$interface.'.conf'), $return);
$conf = ParseConfig($return);
$dhcpdata['DHCPEnabled'] = empty($conf) ? false : true;

2
app/img/wifi-qr-code.php
View file

@ -41,7 +41,7 @@ $ssid = qr_encode($ssid);
$password = qr_encode($password);
$data = "WIFI:S:$ssid;T:$type;P:$password;$hidden;";
$command = "qrencode -t svg -m 0 -o - " . mb_escapeshellarg($data);
$command = "qrencode -t svg -m 1 -o - " . mb_escapeshellarg($data);
$svg = shell_exec($command);
$config_mtime = filemtime(RASPI_HOSTAPD_CONFIG);

4
app/js/custom.js
View file

@ -178,8 +178,8 @@ Populates the DHCP server form fields
Option toggles are set dynamically depending on the loaded configuration
*/
function loadInterfaceDHCPSelect() {
var iface = $('#cbxdhcpiface').val();
$.get('ajax/networking/get_netcfg.php?iface='+iface,function(data){
var strInterface = $('#cbxdhcpiface').val();
$.get('ajax/networking/get_netcfg.php?iface='+strInterface,function(data){
jsonData = JSON.parse(data);
$('#dhcp-iface')[0].checked = jsonData.DHCPEnabled;
$('#txtipaddress').val(jsonData.StaticIP);

5
includes/functions.php
View file

@ -524,11 +524,10 @@ function mb_escapeshellarg($arg)
{
$isWindows = strtolower(substr(PHP_OS, 0, 3)) === 'win';
if ($isWindows) {
$escaped_arg = str_replace(array('"', '%'), '', $arg);
return '"' . str_replace(array('"', '%'), '', $arg) . '"';
} else {
$escaped_arg = str_replace("'", "'\\''", $arg);
return "'" . str_replace("'", "'\\''", $arg) . "'";
}
return "\"$escaped_arg\"";
}
function dnsServers()

12
includes/hostapd.php
View file

@ -59,9 +59,8 @@ function DisplayHostAPDConfig()
}
}
}
exec('cat '. RASPI_HOSTAPD_CONFIG, $hostapdconfig);
exec('iwgetid '. $_POST['interface']. ' -r', $wifiNetworkID);
exec('iwgetid '. escapeshellarg($_POST['interface']). ' -r', $wifiNetworkID);
if (!empty($wifiNetworkID[0])) {
$managedModeEnabled = true;
}
@ -213,11 +212,14 @@ function SaveHostAPDConfig($wpa_array, $enc_types, $modes, $interfaces, $status)
$good_input = false;
}
if ($_POST['wpa'] !== 'none'
&& (strlen($_POST['wpa_passphrase']) < 8 || strlen($_POST['wpa_passphrase']) > 63)
) {
# NB: A pass-phrase is a sequence of between 8 and 63 ASCII-encoded characters (IEEE Std. 802.11i-2004)
# Each character in the pass-phrase must have an encoding in the range of 32 to 126 (decimal). (IEEE Std. 802.11i-2004, Annex H.4.1)
if ($_POST['wpa'] !== 'none' && (strlen($_POST['wpa_passphrase']) < 8 || strlen($_POST['wpa_passphrase']) > 63)) {
$status->addMessage('WPA passphrase must be between 8 and 63 characters', 'danger');
$good_input = false;
} elseif (!ctype_print($_POST['wpa_passphrase'])) {
$status->addMessage('WPA passphrase must be comprised of printable ASCII characters', 'danger');
$good_input = false;
}
if (isset($_POST['hiddenSSID'])) {

22
installers/common.sh
View file

@ -213,7 +213,7 @@ function _create_hostapd_scripts() {
# Move service control shell scripts
sudo cp "$webroot_dir/installers/"service*.sh "$raspap_dir/hostapd" || _install_status 1 "Unable to move service control scripts"
# Make enablelog.sh and disablelog.sh not writable by www-data group.
sudo chown -c root:"$raspap_user" "$raspap_dir/hostapd/"*.sh || _install_status 1 "Unable change owner and/or group"
sudo chown -c root:root "$raspap_dir/hostapd/"*.sh || _install_status 1 "Unable change owner and/or group"
sudo chmod 750 "$raspap_dir/hostapd/"*.sh || _install_status 1 "Unable to change file permissions"
_install_status 0
}
@ -228,7 +228,7 @@ function _create_lighttpd_scripts() {
sudo cp "$webroot_dir/installers/"configport.sh "$raspap_dir/lighttpd" || _install_status 1 "Unable to move service control scripts"
# Make configport.sh writable by www-data group
echo "Changing file ownership"
sudo chown -c root:"$raspap_user" "$raspap_dir/lighttpd/"*.sh || _install_status 1 "Unable change owner and/or group"
sudo chown -c root:root "$raspap_dir/lighttpd/"*.sh || _install_status 1 "Unable change owner and/or group"
sudo chmod 750 "$raspap_dir/lighttpd/"*.sh || _install_status 1 "Unable to change file permissions"
_install_status 0
}
@ -310,8 +310,9 @@ function _install_adblock() {
echo "Moving and setting permissions for blocklist update script"
sudo cp "$webroot_dir/installers/"update_blocklist.sh "$raspap_dir/adblock" || _install_status 1 "Unable to move blocklist update script"
# Make blocklists and update script writable by www-data group
sudo chown -c root:"$raspap_user" "$raspap_dir/adblock/"*.* || _install_status 1 "Unable to change owner/group"
# Make blocklists writable by www-data group, restrict update scripts to root
sudo chown -c root:"$raspap_user" "$raspap_dir/adblock/"*.txt || _install_status 1 "Unable to change owner/group"
sudo chown -c root:root "$raspap_dir/adblock/"*.sh || _install_status 1 "Unable to change owner/group"
sudo chmod 750 "$raspap_dir/adblock/"*.sh || install_error "Unable to change file permissions"
# Create 090_adblock.conf and write values to /etc/dnsmasq.d
@ -400,11 +401,11 @@ function _create_openvpn_scripts() {
_install_log "Creating OpenVPN control scripts"
sudo mkdir $raspap_dir/openvpn || _install_status 1 "Unable to create directory '$raspap_dir/openvpn'"
# Move service auth control & logging shell scripts
# Move service auth control & logging shell scripts
sudo cp "$webroot_dir/installers/"configauth.sh "$raspap_dir/openvpn" || _install_status 1 "Unable to move auth control script"
sudo cp "$webroot_dir/installers/"openvpnlog.sh "$raspap_dir/openvpn" || _install_status 1 "Unable to move logging script"
# Make scripts executable by www-data group
sudo chown -c root:"$raspap_user" "$raspap_dir/openvpn/"*.sh || _install_status 1 "Unable change owner and/or group"
# Restrict script execution to root user
sudo chown -c root:root "$raspap_dir/openvpn/"*.sh || _install_status 1 "Unable change owner and/or group"
sudo chmod 750 "$raspap_dir/openvpn/"*.sh || _install_status 1 "Unable to change file permissions"
_install_status 0
}
@ -490,9 +491,10 @@ function _move_config_file() {
_install_status 1 "'$raspap_dir' directory doesn't exist"
fi
# Copy config file and make writable by www-data group
_install_log "Moving configuration file to $raspap_dir"
sudo cp "$webroot_dir"/raspap.php "$raspap_dir" || _install_status 1 "Unable to move files to '$raspap_dir'"
sudo chown -R $raspap_user:$raspap_user "$raspap_dir" || _install_status 1 "Unable to change file ownership for '$raspap_dir'"
sudo chown -c $raspap_user:"$raspap_user" "$raspap_dir"/raspap.php || _install_status 1 "Unable change owner and/or group"
}
# Set up default configuration
@ -506,8 +508,8 @@ function _default_configuration() {
sudo cp $webroot_dir/config/dhcpcd.conf /etc/dhcpcd.conf || _install_status 1 "Unable to move dhcpcd configuration file"
sudo cp $webroot_dir/config/defaults.json $raspap_network || _install_status 1 "Unable to move defaults.json settings"
echo "Changing file ownership of $raspap_dir"
sudo chown -R $raspap_user:$raspap_user "$raspap_dir" || _install_status 1 "Unable to change file ownership for '$raspap_dir'"
echo "Changing file ownership of ${raspap_network}/defaults.json"
sudo chown $raspap_user:$raspap_user "$raspap_network"/defaults.json || _install_status 1 "Unable to change file ownership for defaults.json"
echo "Checking for existence of /etc/dnsmasq.d"
[ -d /etc/dnsmasq.d ] || sudo mkdir /etc/dnsmasq.d