You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
7.5 KiB
Plaintext
135 lines
7.5 KiB
Plaintext
# This is based on default configuration file for Snuffleupagus (https://snuffleupagus.rtfd.io),
|
|
# for php8.
|
|
# It contains "reasonable" defaults that won't break your websites,
|
|
# and a lot of commented directives that you can enable if you want to
|
|
# have a better protection.
|
|
|
|
# Harden the PRNG
|
|
sp.harden_random.enable();
|
|
|
|
# Disabled XXE
|
|
sp.xxe_protection.enable();
|
|
|
|
# Global configuration variables
|
|
sp.global.secret_key("{{ SNUFFLEUPAGUS_KEY }}");
|
|
|
|
# Globally activate strict mode
|
|
# https://www.php.net/manual/en/language.types.declarations.php#language.types.declarations.strict
|
|
sp.global_strict.enable();
|
|
|
|
# Prevent unserialize-related exploits
|
|
# sp.unserialize_hmac.enable();
|
|
|
|
# Only allow execution of read-only files. This is a low-hanging fruit that you should enable.
|
|
sp.readonly_exec.enable();
|
|
|
|
# PHP has a lot of wrappers, most of them aren't usually useful, you should
|
|
# only enable the ones you're using.
|
|
sp.wrappers_whitelist.list("file,php,phar,mailsosubstreams");
|
|
|
|
# Prevent sloppy comparisons.
|
|
sp.sloppy_comparison.enable();
|
|
|
|
# Use SameSite on session cookie
|
|
# https://snuffleupagus.readthedocs.io/features.html#protection-against-cross-site-request-forgery
|
|
sp.cookie.name("PHPSESSID").samesite("lax");
|
|
|
|
# Harden the `chmod` function (0777 (oct = 511, 0666 = 438)
|
|
sp.disable_function.function("chmod").param("permissions").value("438").drop();
|
|
sp.disable_function.function("chmod").param("permissions").value("511").drop();
|
|
|
|
# Prevent various `mail`-related vulnerabilities
|
|
sp.disable_function.function("mail").param("additional_parameters").value_r("\\-").drop();
|
|
|
|
# Since it's now burned, me might as well mitigate it publicly
|
|
sp.disable_function.function("putenv").param("assignment").value_r("LD_").drop()
|
|
|
|
# This one was burned in Nov 2019 - https://gist.github.com/LoadLow/90b60bd5535d6c3927bb24d5f9955b80
|
|
sp.disable_function.function("putenv").param("assignment").value_r("GCONV_").drop()
|
|
|
|
# Since people are stupid enough to use `extract` on things like $_GET or $_POST, we might as well mitigate this vector
|
|
sp.disable_function.function("extract").param("array").value_r("^_").drop()
|
|
sp.disable_function.function("extract").param("flags").value("0").drop()
|
|
|
|
# This is also burned:
|
|
# ini_set('open_basedir','..');chdir('..');…;chdir('..');ini_set('open_basedir','/');echo(file_get_contents('/etc/passwd'));
|
|
# Since we have no way of matching on two parameters at the same time, we're
|
|
# blocking calls to open_basedir altogether: nobody is using it via ini_set anyway.
|
|
# Moreover, there are non-public bypasses that are also using this vector ;)
|
|
sp.disable_function.function("ini_set").param("option").value_r("open_basedir").drop()
|
|
|
|
# Prevent various `include`-related vulnerabilities
|
|
sp.disable_function.function("require_once").value_r("\.(inc|phtml|php)$").allow();
|
|
sp.disable_function.function("include_once").value_r("\.(inc|phtml|php)$").allow();
|
|
sp.disable_function.function("require").value_r("\.(inc|phtml|php)$").allow();
|
|
sp.disable_function.function("include").value_r("\.(inc|phtml|php)$").allow();
|
|
sp.disable_function.function("require_once").drop()
|
|
sp.disable_function.function("include_once").drop()
|
|
sp.disable_function.function("require").drop()
|
|
sp.disable_function.function("include").drop()
|
|
|
|
# Prevent `system`-related injections
|
|
sp.disable_function.function("system").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();
|
|
sp.disable_function.function("shell_exec").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();
|
|
sp.disable_function.function("exec").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();
|
|
# This is **very** broad but doing better is non-straightforward
|
|
sp.disable_function.function("proc_open").param("command").value_r("^gpg ").allow();
|
|
sp.disable_function.function("proc_open").param("command").value_r("[$|;&`\\n\\(\\)\\\\]").drop();
|
|
|
|
# Prevent runtime modification of interesting things
|
|
sp.disable_function.function("ini_set").param("option").value("assert.active").drop();
|
|
sp.disable_function.function("ini_set").param("option").value("zend.assertions").drop();
|
|
sp.disable_function.function("ini_set").param("option").value("memory_limit").drop();
|
|
sp.disable_function.function("ini_set").param("option").value("include_path").drop();
|
|
sp.disable_function.function("ini_set").param("option").value("open_basedir").drop();
|
|
|
|
# Detect some backdoors via environment recon
|
|
sp.disable_function.function("ini_get").filename("/var/www/roundcube/vendor/guzzlehttp/guzzle/src/functions.php").param("option").value("allow_url_fopen").allow();
|
|
sp.disable_function.function("ini_get").param("option").value("allow_url_fopen").drop();
|
|
sp.disable_function.function("ini_get").param("option").value("open_basedir").drop();
|
|
sp.disable_function.function("ini_get").param("option").value_r("suhosin").drop();
|
|
sp.disable_function.function("function_exists").param("function").value("eval").drop();
|
|
sp.disable_function.function("function_exists").param("function").value("exec").drop();
|
|
sp.disable_function.function("function_exists").param("function").value("system").drop();
|
|
sp.disable_function.function("function_exists").param("function").value("shell_exec").drop();
|
|
sp.disable_function.function("function_exists").param("function").value("proc_open").drop();
|
|
sp.disable_function.function("function_exists").param("function").value("passthru").drop();
|
|
sp.disable_function.function("is_callable").param("value").value("eval").drop();
|
|
sp.disable_function.function("is_callable").param("value").value("exec").drop();
|
|
sp.disable_function.function("is_callable").param("value").value("system").drop();
|
|
sp.disable_function.function("is_callable").param("value").value("shell_exec").drop();
|
|
sp.disable_function.function("is_callable").filename_r("^/var/www/snappymail/snappymail/v/[0-9]+\.[0-9]+\.[0-9]+/app/libraries/snappymail/pgp/gpg\.php$").param("value").value("proc_open").allow();
|
|
sp.disable_function.function("is_callable").param("value").value("proc_open").drop();
|
|
sp.disable_function.function("is_callable").param("value").value("passthru").drop();
|
|
|
|
# Ghetto error-based sqli detection
|
|
#sp.disable_function.function("mysql_query").ret("FALSE").drop();
|
|
#sp.disable_function.function("mysqli_query").ret("FALSE").drop();
|
|
#sp.disable_function.function("PDO::query").ret("FALSE").drop();
|
|
|
|
# Ensure that certificates are properly verified
|
|
sp.disable_function.function("curl_setopt").param("value").value("1").allow();
|
|
sp.disable_function.function("curl_setopt").param("value").value("2").allow();
|
|
# `81` is SSL_VERIFYHOST and `64` SSL_VERIFYPEER
|
|
sp.disable_function.function("curl_setopt").param("option").value("64").drop().alias("Please don't turn CURLOPT_SSL_VERIFYCLIENT off.");
|
|
sp.disable_function.function("curl_setopt").param("option").value("81").drop().alias("Please don't turn CURLOPT_SSL_VERIFYHOST off.");
|
|
|
|
# File upload
|
|
sp.disable_function.function("move_uploaded_file").param("to").value_r("\\.ph").drop();
|
|
sp.disable_function.function("move_uploaded_file").param("to").value_r("\\.ht").drop();
|
|
|
|
# Logging lockdown
|
|
sp.disable_function.function("ini_set").param("option").value_r("error_log").drop()
|
|
sp.disable_function.function("ini_set").param("option").value_r("display_errors").drop()
|
|
|
|
sp.auto_cookie_secure.enable();
|
|
# TODO: consider encrypting the cookies?
|
|
# TODO: ensure this is up to date
|
|
sp.cookie.name("roundcube_sessauth").samesite("strict");
|
|
sp.cookie.name("roundcube_sessid").samesite("strict");
|
|
sp.ini_protection.policy_silent_fail();
|
|
|
|
# roundcube uses unserialize() everywhere.
|
|
# This should do the job until https://github.com/jvoisin/snuffleupagus/issues/438 is implemented.
|
|
sp.disable_function.function("unserialize").param("data").value_r("[cCoO]:\d+:[\"{]").drop();
|