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1200 revamp

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Thorin-Oakenpants 2017-03-20 15:56:05 +13:00 committed by GitHub
parent 6b6f614a72
commit b2eccc65f4
1 changed files with 106 additions and 87 deletions
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user.js
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@ -516,41 +516,28 @@ user_pref("browser.cache.frecency_experiment", -1);
/* 1012: disable resuming session from crash [SETUP] ***/ /* 1012: disable resuming session from crash [SETUP] ***/
user_pref("browser.sessionstore.resume_from_crash", false); user_pref("browser.sessionstore.resume_from_crash", false);
/*** 1200: HTTPS ( SSL / OCSP / CERTS / ENCRYPTION / HSTS / HPKP ) /*** 1200: HTTPS ( SSL/TLS / OCSP / CERTS / HSTS / HPKP / CIPHERS )
Note that your cipher and other settings can be used server side as a fingerprint attack vector: Note that your cipher and other settings can be used server side as a fingerprint attack
see https://www.securityartwork.es/2017/02/02/tls-client-fingerprinting-with-bro/ vector, see [1] (It's quite technical but the first part is easy to understand
You can either strengthen your encryption/cipher suite and protocols (security) or keep them and you can stop reading when you reach the second section titled "Enter Bro")
at default and let Mozilla handle them (dragging their feet for fear of breaking legacy sites) ***/
Option 1: Use our settings to tighten up encryption options. It *is* a fingerprinting attack
vector, and we certainly do want to reduce any attack surface, but this is not how
you *DEFEAT* fingerprinting - to do that you need large numbers to buy into the same
enforced browser-wide settings (such as TBB), and/or you use OpSec.
Option 2: Use Firefox defaults for the 1260's items (item 1260 default for SHA-1, is local only
anyway). There is nothing *weak* about Firefox's defaults, but Mozilla (and other
browsers) will always lag for fear of breakage and upset end-users
[1] https://www.securityartwork.es/2017/02/02/tls-client-fingerprinting-with-bro/
***/
user_pref("ghacks_user.js.parrot", "1200 syntax error: the parrot's a stiff!"); user_pref("ghacks_user.js.parrot", "1200 syntax error: the parrot's a stiff!");
/* 1201: block rc4 fallback (default is now false as of at least FF45) ***/ /** SSL (Secure Sockets Layer) / TLS (Transport Layer Security) ***/
user_pref("security.tls.unrestricted_rc4_fallback", false); /* 1201: reject communication with servers using old SSL/TLS - vulnerable to a MiTM attack
/* 1203: enable OCSP stapling
* [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ ***/
user_pref("security.ssl.enable_ocsp_stapling", true);
/* 1204: reject communication with servers using old SSL/TLS - vulnerable to a MiTM attack
* [WARNING] tested Feb 2017 - still breaks too many sites * [WARNING] tested Feb 2017 - still breaks too many sites
* [1] https://wiki.mozilla.org/Security:Renegotiation ***/ * [1] https://wiki.mozilla.org/Security:Renegotiation ***/
// user_pref("security.ssl.require_safe_negotiation", true); // user_pref("security.ssl.require_safe_negotiation", true);
/* 1205: display warning (red padlock) for "broken security" /* 1202: control TLS versions with min and max
* [1] https://wiki.mozilla.org/Security:Renegotiation ***/
user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
/* 1206: require certificate revocation check through OCSP protocol
* This leaks information about the sites you visit to the CA (cert authority)
* It's a trade-off between security (checking) and privacy (leaking info to the CA)
* [WARNING] Since FF44 the default is false. If set to true, this may/will cause some
* site breakage. Some users have previously mentioned issues with youtube, microsoft etc ***/
// user_pref("security.OCSP.require", true);
/* 1207: query OCSP responder servers to confirm current validity of certificates (default=1)
* 0=disable, 1=validate only certificates that specify an OCSP service URL
* 2=enable and use values in security.OCSP.URL and security.OCSP.signing ***/
user_pref("security.OCSP.enabled", 1);
/* 1208: enforce strict pinning
* PKP (public key pinning) 0=disabled 1=allow user MiTM (such as your antivirus), 2=strict
* [WARNING] If you rely on an AV (antivirus) to protect your web browsing
* by inspecting ALL your web traffic, then leave at current default =1
* [1] https://trac.torproject.org/projects/tor/ticket/16206 ***/
user_pref("security.cert_pinning.enforcement_level", 2);
/* 1209: control TLS versions with min and max
* 1=min version of TLS 1.0, 2-min version of TLS 1.1, 3=min version of TLS 1.2 etc * 1=min version of TLS 1.0, 2-min version of TLS 1.1, 3=min version of TLS 1.2 etc
* [WARNING] FF/chrome currently allow TLS 1.0 by default, so this is your call. * [WARNING] FF/chrome currently allow TLS 1.0 by default, so this is your call.
* [1] http://kb.mozillazine.org/Security.tls.version.* * [1] http://kb.mozillazine.org/Security.tls.version.*
@ -558,77 +545,109 @@ user_pref("security.cert_pinning.enforcement_level", 2);
// user_pref("security.tls.version.min", 2); // user_pref("security.tls.version.min", 2);
// user_pref("security.tls.version.fallback-limit", 3); // user_pref("security.tls.version.fallback-limit", 3);
// user_pref("security.tls.version.max", 4); // 4 = allow up to and including TLS 1.3 // user_pref("security.tls.version.max", 4); // 4 = allow up to and including TLS 1.3
/* 1210: disable DHE (Diffie-Hellman Key Exchange) /* 1203: disable SSL session tracking (FF36+)
* [WARNING] may break obscure sites, but not major sites, which should support ECDH over DHE * SSL Session IDs speed up HTTPS connections (no need to renegotiate) and last for 48hrs.
* [1] https://www.eff.org/deeplinks/2015/10/how-to-protect-yourself-from-nsa-attacks-1024-bit-DH ***/ * Since the ID is unique, web servers can (and do) use it for tracking. If set to true,
user_pref("security.ssl3.dhe_rsa_aes_128_sha", false); * this disables sending SSL Session IDs and TLS Session Tickets to prevent session tracking
user_pref("security.ssl3.dhe_rsa_aes_256_sha", false); * [1] https://tools.ietf.org/html/rfc5077
/* 1211: disable or limit SHA-1 * [2] https://bugzilla.mozilla.org/show_bug.cgi?id=967977 ***/
user_pref("security.ssl.disable_session_identifiers", true); // (hidden pref)
/** OCSP (Online Certificate Status Protocol) ***/
/* 1210: enable OCSP Stapling
* [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ ***/
user_pref("security.ssl.enable_ocsp_stapling", true);
/* 1211: query OCSP responder servers to confirm current validity of certificates
* 0=disable, 1=validate only certificates that specify an OCSP service URL (default)
* 2=enable and use values in security.OCSP.URL and security.OCSP.signing.
* OCSP (non-stapled) leaks information about the sites you visit to the CA (cert authority)
* It's a trade-off between security (checking) and privacy (leaking info to the CA)
* [1] https://en.wikipedia.org/wiki/Ocsp ***/
user_pref("security.OCSP.enabled", 1);
/* 1212: require certificate revocation check through OCSP protocol
* [WARNING] Since FF44 the default is false. If set to true, this may/will cause some
* site breakage. Some users have previously mentioned issues with youtube, microsoft etc ***/
// user_pref("security.OCSP.require", true);
/** CERTS / HSTS (HTTP Strict Transport Security) / HPKP (HTTP Public Key Pinning) ***/
/* 1220: disable Microsoft Family Safety cert (Windows 8.1) (FF50+)
* 0 = disable detecting Family Safety mode and importing the root
* 1 = only attempt to detect Family Safety mode (don't import the root)
* 2 = detect Family Safety mode and import the root ***/
user_pref("security.family_safety.mode", 0);
/* 1221: disable intermediate certificate caching (fingerprinting attack vector)
* [NOTE] This may be better handled under FPI (ticket 1323644, part of Tor Uplift)
* [WARNING] This affects login/cert/key dbs. The effect is all credentials are session-only.
* Saved logins and passwords are not available. Reset the pref and restart to return them.
* [TEST] https://fiprinca.0x90.eu/poc/
* [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1334485 - related bug
* [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1216882 - related bug (see comment 9) ***/
// user_pref("security.nocertdb", true); // (hidden pref)
/* 1222: enforce strict pinning
** PKP (Public Key Pinning) 0=disabled 1=allow user MiTM (such as your antivirus), 2=strict
* [WARNING] If you rely on an AV (antivirus) to protect your web browsing
* by inspecting ALL your web traffic, then leave at current default=1
* [1] https://trac.torproject.org/projects/tor/ticket/16206 ***/
user_pref("security.cert_pinning.enforcement_level", 2);
/* 1223: enforce HSTS preload list (default is true)
* The list is compiled into Firefox and used to always load those domains over HTTPS
* [1] https://blog.mozilla.org/security/2012/11/01/preloading-hsts/
* [2] https://wiki.mozilla.org/Privacy/Features/HSTS_Preload_List ***/
user_pref("network.stricttransportsecurity.preloadlist", true);
/** MIXED CONTENT ***/
/* 1240: disable insecure active content on https pages - mixed content ***/
user_pref("security.mixed_content.block_active_content", true);
/* 1241: disable insecure passive content (such as images) on https pages - mixed context
* [WARNING] when set to true, this will visually break many sites (March 2017) ***/
// user_pref("security.mixed_content.block_display_content", true);
/* 1242: disable HSTS Priming (FF51+)
* Allowing HSTS Priming may load formerly blocked mixed-content, but it does so by
* sending additional priming requests which may cause noticeable delays eg requests time
* out or are not handled well by servers, and there are possible fingerprinting issues
* [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1246540#c145 ***/
// user_pref("security.mixed_content.send_hsts_priming", false);
// user_pref("security.mixed_content.use_hsts", false);
/** CIPHERS [see the section 1200 intro] ***/
/* 1260: disable or limit SHA-1
* 0 = all SHA1 certs are allowed * 0 = all SHA1 certs are allowed
* 1 = all SHA1 certs are blocked (including perfectly valid ones from 2015 and earlier) * 1 = all SHA1 certs are blocked (including perfectly valid ones from 2015 and earlier)
* 2 = deprecated option that now maps to 1 * 2 = deprecated option that now maps to 1
* 3 = only allowed for locally-added roots (e.g. anti-virus) * 3 = only allowed for locally-added roots (e.g. anti-virus)
* 4 = only allowed for locally-added roots or for certs in 2015 and earlier * 4 = only allowed for locally-added roots or for certs in 2015 and earlier
* [WARNING] when disabled, some man-in-the-middle devices (eg security scanners and antivirus * [WARNING] when disabled, some man-in-the-middle devices (eg security scanners and
* products, are failing to connect to HTTPS sites. SHA-1 will eventually become obsolete. * antivirus products, may fail to connect to HTTPS sites. SHA-1 is *almost* obsolete.
* [1] https://blog.mozilla.org/security/2016/10/18/phasing-out-sha-1-on-the-public-web/ * [1] https://blog.mozilla.org/security/2016/10/18/phasing-out-sha-1-on-the-public-web/ ***/
* [2] https://github.com/pyllyukko/user.js/issues/194#issuecomment-256509998 ***/
user_pref("security.pki.sha1_enforcement_level", 1); user_pref("security.pki.sha1_enforcement_level", 1);
/* 1212: disable SSL session tracking (FF36+) /* 1261: disable 3DES (effective key size < 128)
* SSL session IDs speed up HTTPS connections (no need to renegotiate) and last for 48hrs.
* Since the ID is unique, web servers can (and do) use it for tracking. If set to true,
* this disables sending SSL3 Session IDs and TLS Session Tickets to prevent session tracking
* [1] https://tools.ietf.org/html/rfc5077
* [2] https://bugzilla.mozilla.org/show_bug.cgi?id=967977 ***/
user_pref("security.ssl.disable_session_identifiers", true); // (hidden pref)
/* 1213: disable 3DES (effective key size < 128)
* [1] https://en.wikipedia.org/wiki/3des#Security * [1] https://en.wikipedia.org/wiki/3des#Security
* [2] http://en.citizendium.org/wiki/Meet-in-the-middle_attack * [2] http://en.citizendium.org/wiki/Meet-in-the-middle_attack
* [3] http://www-archive.mozilla.org/projects/security/pki/nss/ssl/fips-ssl-ciphersuites.html ***/ * [3] http://www-archive.mozilla.org/projects/security/pki/nss/ssl/fips-ssl-ciphersuites.html ***/
user_pref("security.ssl3.rsa_des_ede3_sha", false); user_pref("security.ssl3.rsa_des_ede3_sha", false);
/* 1214: disable 128 bits ***/ /* 1262: disable 128 bits ***/
user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false); user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false);
user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false); user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false);
/* 1215: disable Microsoft Family Safety cert (Windows 8.1) (FF50+) /* 1263: disable DHE (Diffie-Hellman Key Exchange)
* 0 = disable detecting Family Safety mode and importing the root * [WARNING] may break obscure sites, but not major sites, which should support ECDH over DHE
* 1 = only attempt to detect Family Safety mode (don't import the root) * [1] https://www.eff.org/deeplinks/2015/10/how-to-protect-yourself-from-nsa-attacks-1024-bit-DH ***/
* 2 = detect Family Safety mode and import the root ***/ user_pref("security.ssl3.dhe_rsa_aes_128_sha", false);
user_pref("security.family_safety.mode", 0); user_pref("security.ssl3.dhe_rsa_aes_256_sha", false);
/* 1216: disable insecure active content on https pages - mixed content ***/ /* 1264: disable the remaining non-modern cipher suites as of FF52
user_pref("security.mixed_content.block_active_content", true);
/* 1217: disable insecure passive content (such as images) on https pages - mixed context
* current default=false, leave it this way as too many sites break visually ***/
// user_pref("security.mixed_content.block_display_content", true);
/* 1218: disable HSTS Priming (FF51+)
* We disable it because formerly blocked mixed-content may load, may cause noticeable delays
* eg requests time out, requests may not be handled well by servers, possible fingerprinting
* [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1246540#c145 ***/
user_pref("security.mixed_content.send_hsts_priming", false);
user_pref("security.mixed_content.use_hsts", false);
/* 1219: enforce HSTS preload list (default is true)
* The list is compiled into Firefox and is used to always use HTTPS for the domains on that list
* [1] https://blog.mozilla.org/security/2012/11/01/preloading-hsts/
* [2] https://wiki.mozilla.org/Privacy/Features/HSTS_Preload_List ***/
user_pref("network.stricttransportsecurity.preloadlist", true);
/* 1220: disable intermediate certificate caching (fingerprinting attack vector)
* [NOTE] This may be better handled under FPI (ticket 1323644, part of Tor Uplift)
* [WARNING] This affects login/cert/key dbs. The effect is all credentials are session-only.
* Saved logins and passwords are not available. Reset the pref and restart to return them.
* [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1334485 - related bug
* [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1216882 - related bug (see comment 9) ***/
// user_pref("security.nocertdb", true); // (hidden pref)
/* 1221: control "Add Security Exception" dialog on SSL warnings
* 0=do neither 1=pre-populate url 2+pre-populate url + pre-fetch cert (default)
* [1] https://github.com/pyllyukko/user.js/issues/210 ***/
user_pref("browser.ssl_override_behavior", 1);
/* 1223: display advanced information on Insecure Connection warning pages (thanks crssi)
* only works when it's possible to add an exception, i.e doesn't work for HSTS (https://subdomain.preloaded-hsts.badssl.com/)
* [TEST] https://expired.badssl.com/ ***/
user_pref("browser.xul.error_pages.expert_bad_cert", true);
/* 1224: disable the remaining non-modern cipher suites as of FF52
* [NOTE] commented out because it still breaks too many sites ***/ * [NOTE] commented out because it still breaks too many sites ***/
// user_pref("security.ssl3.rsa_aes_128_sha", false); // user_pref("security.ssl3.rsa_aes_128_sha", false);
// user_pref("security.ssl3.rsa_aes_256_sha", false); // user_pref("security.ssl3.rsa_aes_256_sha", false);
/* 1265: block rc4 fallback (will be deprecated in 53) ***/
user_pref("security.tls.unrestricted_rc4_fallback", false);
/** UI (User Interface) ***/
/* 1270: display warning (red padlock) for "broken security"
* [1] https://wiki.mozilla.org/Security:Renegotiation ***/
user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
/* 1271: control "Add Security Exception" dialog on SSL warnings
* 0=do neither 1=pre-populate url 2+pre-populate url + pre-fetch cert (default)
* [1] https://github.com/pyllyukko/user.js/issues/210 ***/
user_pref("browser.ssl_override_behavior", 1);
/* 1272: display advanced information on Insecure Connection warning pages
* only works when it's possible to add an exception
* i.e doesn't work for HSTS discrepancies (https://subdomain.preloaded-hsts.badssl.com/)
* [TEST] https://expired.badssl.com/ ***/
user_pref("browser.xul.error_pages.expert_bad_cert", true);
/*** 1400: FONTS ***/ /*** 1400: FONTS ***/
user_pref("ghacks_user.js.parrot", "1400 syntax error: the parrot's bereft of life!"); user_pref("ghacks_user.js.parrot", "1400 syntax error: the parrot's bereft of life!");