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Enforce Snow integration with CSP (#118)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| function bypass(wins) { | ||
| (wins || []).forEach(w => w.alert.call(top, 'snow bypass attempt')); | ||
| } | ||
|
|
||
| function run(js) { | ||
| const script = document.createElement('script'); | ||
| script.textContent = '{' + js + '}'; | ||
| document.head.appendChild(script); | ||
| } | ||
|
|
||
| (function(){ | ||
| location.href.includes('self-xss-challenge-msg') && (msg.style.display = 'block'); | ||
|
|
||
| location.search.includes('disable') || SNOW((win) => { | ||
| win.alert = (msg) => { | ||
| console.log('Snow: ', 'alert API is disabled, message is printed to console instead: ', msg); | ||
| } | ||
| }); | ||
|
|
||
| ta.value = JSON.parse(localStorage.code_snow || '""') || | ||
| ` | ||
| /* | ||
| attempts to bypass Snow after running: | ||
| SNOW((win) => { | ||
| win.alert = (msg) => { | ||
| console.log('Snow: ', 'alert API is disabled, message is printed to console instead: ', msg); | ||
| } | ||
| }); | ||
| */ | ||
| debugger; | ||
| // insertion bypass attempt | ||
| (function(){ | ||
| const ifr = document.createElement('iframe'); | ||
| document.head.appendChild(ifr); | ||
| ifr.contentWindow.alert.call(top, 'alert bypass using insertion') | ||
| }()); | ||
| // innerHTML bypass attempt | ||
| (function(){ | ||
| const a = document.createElement('a'); | ||
| a.innerHTML = '<iframe id="xxx"></iframe>'; | ||
| document.head.appendChild(a); | ||
| a.firstChild.contentWindow.alert.call(top, 'alert bypass using innerHTML') | ||
| }()); | ||
| // onload attribute bypass attempt | ||
| (function(){ | ||
| const ifr = document.createElement('iframe'); | ||
| ifr.onload = () => ifr.contentWindow.alert.call(top, 'alert bypass using onload attribute') | ||
| document.head.appendChild(ifr); | ||
| }()); | ||
| // onload listener bypass attempt | ||
| (function(){ | ||
| const ifr = document.createElement('iframe'); | ||
| ifr.addEventListener('load', () => ifr.contentWindow.alert.call(top, 'alert bypass using onload listener')) | ||
| document.head.appendChild(ifr); | ||
| }()); | ||
| `; | ||
|
|
||
| bt.addEventListener('click', () => { | ||
| localStorage.code_snow = JSON.stringify(ta.value); | ||
| run(ta.value); | ||
| }); | ||
|
|
||
| window.addEventListener('keydown', (event) => { | ||
| if ((event.ctrlKey || event.metaKey) && event.code === 'Enter') { | ||
| bt.click(); | ||
| } | ||
| }); | ||
| }()); |
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