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https://github.com/Ylianst/MeshCentral.git
synced 2024-09-11 08:55:32 +03:00
Added 2FA rate limiting, #3393
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parent
467a6bfb35
commit
5121295128
@ -240,6 +240,17 @@
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"coolofftime": { "type": "integer", "default": null, "description": "Additional time in minute that login attempts will be denied once the invalid login limit is reached." }
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}
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},
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"maxInvalid2fa": {
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"type": "object",
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"additionalProperties": false,
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"description": "This section described a policy for how many times an IP address is allowed to attempt to perform two-factor authenticaiton (2FA) incorrectly. By default it's 10 times in 10 minutes, but this can be changed here.",
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"properties": {
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"exclude": { "type": "string", "default": null, "description": "Ranges of IP addresses that are not subject to invalid 2FA limitations. For example: 192.168.1.0/24,172.16.0.1"},
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"time": { "type": "integer", "default": 10, "description": "Time in minutes over which the a maximum number of invalid 2FA attempts is allowed from an IP address." },
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"count": { "type": "integer", "default": 10, "description": "Maximum number of invalid 2FA attempts from an IP address in the time period." },
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"coolofftime": { "type": "integer", "default": null, "description": "Additional time in minute that 2FA attempts will be denied once the invalid 2FA limit is reached." }
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}
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},
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"amtProvisioningServer": {
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"type": "object",
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"additionalProperties": false,
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40
meshuser.js
40
meshuser.js
@ -5370,7 +5370,8 @@ module.exports.CreateMeshUser = function (parent, db, ws, req, args, domain, use
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'args': [serverUserCommandArgs, ""],
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'autobackup': [serverUserCommandAutoBackup, ""],
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'backupconfig': [serverUserCommandBackupConfig, ""],
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'badlogins': [serverUserCommandBadLogins, ""],
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'badlogins': [serverUserCommandBadLogins, "Displays or resets the invalid login rate limiting table."],
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'bad2fa': [serverUserCommandBad2fa, "Displays or resets the invalid 2FA rate limiting table."],
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'certexpire': [serverUserCommandCertExpire, ""],
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'certhashes': [serverUserCommandCertHashes, ""],
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'closeusersessions': [serverUserCommandCloseUserSessions, "Disconnects all sessions for a specified user."],
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@ -6367,6 +6368,43 @@ module.exports.CreateMeshUser = function (parent, db, ws, req, args, domain, use
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}
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}
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function serverUserCommandBad2fa(cmdData) {
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if (parent.parent.config.settings.maxinvalid2fa == false) {
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cmdData.result = 'Bad 2FA filter is disabled.';
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} else {
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if (cmdData.cmdargs['_'] == 'reset') {
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// Reset bad login table
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parent.bad2faTable = {};
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parent.bad2faTableLastClean = 0;
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cmdData.result = 'Done.';
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} else if (cmdData.cmdargs['_'] == '') {
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// Show current bad login table
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if (typeof parent.parent.config.settings.maxinvalid2fa.coolofftime == 'number') {
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cmdData.result = "Max is " + parent.parent.config.settings.maxinvalid2fa.count + " bad 2FA(s) in " + parent.parent.config.settings.maxinvalid2fa.time + " minute(s), " + parent.parent.config.settings.maxinvalid2fa.coolofftime + " minute(s) cooloff.\r\n";
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} else {
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cmdData.result = "Max is " + parent.parent.config.settings.maxinvalid2fa.count + " bad 2FA(s) in " + parent.parent.config.settings.maxinvalid2fa.time + " minute(s).\r\n";
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}
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var bad2faCount = 0;
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parent.cleanBad2faTable();
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for (var i in parent.bad2faTable) {
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bad2faCount++;
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if (typeof parent.bad2faTable[i] == 'number') {
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cmdData.result += "Cooloff for " + Math.floor((parent.bad2faTable[i] - Date.now()) / 60000) + " minute(s)\r\n";
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} else {
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if (parent.bad2faTable[i].length > 1) {
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cmdData.result += (i + ' - ' + parent.bad2faTable[i].length + " records\r\n");
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} else {
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cmdData.result += (i + ' - ' + parent.bad2faTable[i].length + " record\r\n");
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}
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}
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}
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if (bad2faCount == 0) { cmdData.result += 'No bad 2FA.'; }
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} else {
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cmdData.result = 'Usage: bad2fa [reset]';
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}
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}
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}
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function serverUserCommandDispatchTable(cmdData) {
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for (var i in parent.parent.eventsDispatch) {
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cmdData.result += (i + ', ' + parent.parent.eventsDispatch[i].length + '\r\n');
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@ -113,6 +113,12 @@
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"count": 10,
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"coolofftime": 10
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},
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"__maxInvalid2fa": "Time in minutes, max amount of bad two-factor authentication from a source IP in the time before 2FA's are rejected.",
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"_maxInvalid2fa": {
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"time": 10,
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"count": 10,
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"coolofftime": 10
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},
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"watchDog": { "interval": 100, "timeout": 400 },
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"_AmtProvisioningServer": {
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"port": 9971,
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83
webserver.js
83
webserver.js
@ -1097,6 +1097,16 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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if (result == false) {
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var randomWaitTime = 0;
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// Check if 2FA is allowed for this IP address
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if (obj.checkAllow2Fa(req) == false) {
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// Wait and redirect the user
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setTimeout(function () {
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req.session.messageid = 114; // IP address blocked, try again later.
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if (direct === true) { handleRootRequestEx(req, res, domain); } else { res.redirect(domain.url + getQueryPortion(req)); }
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}, 2000 + (obj.crypto.randomBytes(2).readUInt16BE(0) % 4095));
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return;
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}
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// 2-step auth is required, but the token is not present or not valid.
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if ((req.body.token != null) || (req.body.hwtoken != null)) {
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randomWaitTime = 2000 + (obj.crypto.randomBytes(2).readUInt16BE(0) % 4095); // This is a fail, wait a random time. 2 to 6 seconds.
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@ -1105,7 +1115,7 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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parent.debug('web', 'handleLoginRequest: invalid 2FA token');
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const ua = getUserAgentInfo(req);
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obj.parent.DispatchEvent(['*', 'server-users', user._id], obj, { action: 'authfail', username: user.name, userid: user._id, domain: domain.id, msg: 'User login attempt with incorrect 2nd factor from ' + req.clientIp, msgid: 108, msgArgs: [req.clientIp, ua.browserStr, ua.osStr] });
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obj.setbadLogin(req);
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obj.setbad2Fa(req);
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} else {
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parent.debug('web', 'handleLoginRequest: 2FA token required');
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}
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@ -1599,6 +1609,17 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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checkUserOneTimePassword(req, domain, user, req.body.token, req.body.hwtoken, function (result) {
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if (result == false) {
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if (i == 0) {
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// Check if 2FA is allowed for this IP address
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if (obj.checkAllow2Fa(req) == false) {
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// Wait and redirect the user
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setTimeout(function () {
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req.session.messageid = 114; // IP address blocked, try again later.
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if (direct === true) { handleRootRequestEx(req, res, domain); } else { res.redirect(domain.url + getQueryPortion(req)); }
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}, 2000 + (obj.crypto.randomBytes(2).readUInt16BE(0) % 4095));
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return;
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}
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// 2-step auth is required, but the token is not present or not valid.
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parent.debug('web', 'handleResetAccountRequest: Invalid 2FA token, try again');
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if ((req.body.token != null) || (req.body.hwtoken != null)) {
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@ -1614,7 +1635,7 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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req.session.messageid = 108; // Invalid token, try again.
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const ua = getUserAgentInfo(req);
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obj.parent.DispatchEvent(['*', 'server-users', user._id], obj, { action: 'authfail', username: user.name, userid: user._id, domain: domain.id, msg: 'User login attempt with incorrect 2nd factor from ' + req.clientIp, msgid: 108, msgArgs: [req.clientIp, ua.browserStr, ua.osStr] });
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obj.setbadLogin(req);
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obj.setbad2Fa(req);
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}
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}
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req.session.loginmode = 5;
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@ -7828,6 +7849,64 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
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obj.badLoginTableLastClean = 0;
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}
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// This is the invalid 2FA throttling code
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obj.bad2faTable = {};
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obj.bad2faTableLastClean = 0;
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if (parent.config.settings == null) { parent.config.settings = {}; }
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if (parent.config.settings.maxinvalid2fa !== false) {
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if (typeof parent.config.settings.maxinvalid2fa != 'object') { parent.config.settings.maxinvalid2fa = { time: 10, count: 10 }; }
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if (typeof parent.config.settings.maxinvalid2fa.time != 'number') { parent.config.settings.maxinvalid2fa.time = 10; }
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if (typeof parent.config.settings.maxinvalid2fa.count != 'number') { parent.config.settings.maxinvalid2fa.count = 10; }
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if ((typeof parent.config.settings.maxinvalid2fa.coolofftime != 'number') || (parent.config.settings.maxinvalid2fa.coolofftime < 1)) { parent.config.settings.maxinvalid2fa.coolofftime = null; }
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}
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obj.setbad2Fa = function (ip) { // Set an IP address that just did a bad 2FA request
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if (parent.config.settings.maxinvalid2fa === false) return;
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if (typeof ip == 'object') { ip = ip.clientIp; }
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if (parent.config.settings.maxinvalid2fa != null) {
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if (typeof parent.config.settings.maxinvalid2fa.exclude == 'string') {
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const excludeSplit = parent.config.settings.maxinvalid2fa.exclude.split(',');
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for (var i in excludeSplit) { if (require('ipcheck').match(ip, excludeSplit[i])) return; }
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} else if (Array.isArray(parent.config.settings.maxinvalid2fa.exclude)) {
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for (var i in parent.config.settings.maxinvalid2fa.exclude) { if (require('ipcheck').match(ip, parent.config.settings.maxinvalid2fa.exclude[i])) return; }
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}
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}
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var splitip = ip.split('.');
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if (splitip.length == 4) { ip = (splitip[0] + '.' + splitip[1] + '.' + splitip[2] + '.*'); }
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if (++obj.bad2faTableLastClean > 100) { obj.cleanBad2faTable(); }
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if (typeof obj.bad2faTable[ip] == 'number') { if (obj.bad2faTable[ip] < Date.now()) { delete obj.bad2faTable[ip]; } else { return; } } // Check cooloff period
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if (obj.bad2faTable[ip] == null) { obj.bad2faTable[ip] = [Date.now()]; } else { obj.bad2faTable[ip].push(Date.now()); }
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if ((obj.bad2faTable[ip].length >= parent.config.settings.maxinvalid2fa.count) && (parent.config.settings.maxinvalid2fa.coolofftime != null)) {
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obj.bad2faTable[ip] = Date.now() + (parent.config.settings.maxinvalid2fa.coolofftime * 60000); // Move to cooloff period
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}
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}
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obj.checkAllow2Fa = function (ip) { // Check if an IP address is allowed to perform 2FA
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if (parent.config.settings.maxinvalid2fa === false) return true;
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if (typeof ip == 'object') { ip = ip.clientIp; }
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var splitip = ip.split('.');
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if (splitip.length == 4) { ip = (splitip[0] + '.' + splitip[1] + '.' + splitip[2] + '.*'); } // If this is IPv4, keep only the 3 first
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var cutoffTime = Date.now() - (parent.config.settings.maxinvalid2fa.time * 60000); // Time in minutes
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var ipTable = obj.bad2faTable[ip];
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if (ipTable == null) return true;
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if (typeof ipTable == 'number') { if (obj.bad2faTable[ip] < Date.now()) { delete obj.bad2faTable[ip]; } else { return false; } } // Check cooloff period
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while ((ipTable.length > 0) && (ipTable[0] < cutoffTime)) { ipTable.shift(); }
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if (ipTable.length == 0) { delete obj.bad2faTable[ip]; return true; }
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return (ipTable.length < parent.config.settings.maxinvalid2fa.count); // No more than x bad 2FAs in x minutes
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}
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obj.cleanBad2faTable = function () { // Clean up the IP address 2FA blockage table, we do this occasionaly.
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if (parent.config.settings.maxinvalid2fa === false) return;
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var cutoffTime = Date.now() - (parent.config.settings.maxinvalid2fa.time * 60000); // Time in minutes
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for (var ip in obj.bad2faTable) {
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var ipTable = obj.bad2faTable[ip];
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if (typeof ipTable == 'number') {
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if (obj.bad2faTable[ip] < Date.now()) { delete obj.bad2faTable[ip]; } // Check cooloff period
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} else {
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while ((ipTable.length > 0) && (ipTable[0] < cutoffTime)) { ipTable.shift(); }
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if (ipTable.length == 0) { delete obj.bad2faTable[ip]; }
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}
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}
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obj.bad2faTableLastClean = 0;
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}
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// Hold a websocket until additional arguments are provided within the socket.
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// This is a generic function that can be used for any websocket to avoid passing arguments in the URL.
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function getWebsocketArgs(ws, req, func) {
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