Dynalist is vulnerable to Zalgo

🐛Bugs
1

Steps to reproduce

Starting from scratch, what are the steps to make the bug happen? The fewer the steps, the better.

  1. Copy-paste Zalgo everywhere

Expected result

What do you expect to see after carrying out the steps above?

Lack of negative consequences like text bleed or slowness

Actual result

Instead of the expected result, what happened?

Text bleed is all over the place and Dynalist starts becoming unresponsive

Environment

Which operating system are you using? Which browser are you using? If you’re using a desktop or mobile app, what’s the version number of Dynalist?

Windows 8 x64 Chrome latest stable, however it happens everywhere.

Additional information

Anything else you think would help our investigation, like a screenshot or a log file? You can drag and drop screenshots to this box. For large amount of text, try putting them into something like Pastebin.

2017-09-21 02_58_49-Ị̴̲͔̝͔ͭ̂ͤ̐ͩ̑̉̕ ̛̬̻͕̱̭͎̪̄ͭ̈́͒̀̚͡͝u̶̶̵̖̤̭͓ͯ͆ͦ́̅̀̅̿̆̚͠͠s̴̡̢̹̪͎͉ͣͪ͑ͧ̌̃͑̽͂ͦ̾ͪͩͩ̉̎ͣͣ́͘.png779×762 374 KB

I pasted very little of it in fear of breaking my own Dynalist.

Additional comments

While this might not seem important, moderate zalgo-proofing should be done everywhere where there are collaboration features present. For an ok example see YouTube comments (try pasting something massive there).

To save a google search for anyone who doesn’t know how to create that - http://www.eeemo.net, among many others

1 Like
2

Thanks for reporting. I have no idea how one would go around solving this though, @Shida?

Also @Dos have you tried other fonts, like “System”? (Not sure if this is related to fonts, just throwing out ideas)

3

No no, this behavior is sort of supposed to happen because it uses regular unicode capabilites, and the font doesn’t matter.

However it is possible to limit text bleed on other fields (example from youtube:
)
, and slowdown was weird and wasn’t supposed to happen.
Even opening file pane was slow.

Just to be clear - this is a very minor quirk. Very few sites protect against this.

ps. And to be extra-clear - this is definitely outside normal usage patterns :slight_smile:

1 Like
4

Got it! Thanks for the clarification.

We’ll take a look at this when we have the bandwidth then. Thanks again!

5

I believe anyone trying this is probably not doing it maliciously, and thus it’s highly unlikely that it will affect other people. I’ve taken a quick look online but I have not found documentation on protection mechanisms.

6

It can be done maliciously (or rather, as a prank), becauses it allows text from one field to overlay text in other fields, say, to block other person’s comment from being readable.

This is fairly bening, but I think pretty much all sites are protected nowadays, as opposed to couple of years ago when most sites weren’t.

For example, see how THIS site handles this:
(it doesn’t allow bleeding out into other regions of the page, instead it limits the comment to just it’s own space, and if you copy paste the text into dynalist the bleeding will be all over the place)

2 Likes
7

Z̶̡̠̯̦̘̪̖͈̙͖̺̯̟̱̺̫͕͎͈̾͊̂ͭ̊̐ä̴͇̱͙͔̲̲̠́̽̔͋̅̎̍ͯ̌ͯͨ̔ͭ͒̋ͯͦ̄͞͝ͅl̢̛ͯ̾͊̀ͭ̄͏̛̝̼͈̺̣̼̰͚͖̞͝g̾̋͂ͥ̋ͭ̐҉̴̢̼͇̲͚̀͞ơ̥͓͓̼̗͇͚͍͚͔̳̮̤̪͙̪̒͗ͮ͑̏ͯ̆̂ͮ̅̈̿̆͝ ̡̛͙̜̦̖̝̫̓͆̉̃͛ͯ̃̚͝͡t̡̮͇̯̙̞̮͔̙̯͈̰͈̫̘̫͓ͤ͂ͪ̊͊̇̿̎͛̃͂ͬͭ͌̊͋ͣͥ͡é̛̮̩̞̰͕̦̝̯̭̲͕͚̫̞̘̦͙̗̊̅̚͜͢͠ś̞̯̭̮̳̝̱͈̱̰͖̞̻̬͓͖͈̅ͩ̆̓͛ͯ͜͜ţ̛̣͖͔̣̝̩̣̝̱̠͍̬̮̜͌͐̀ͩͫ̃ͮ ̵̨̳̞̭̺͉͇̬͚̩͍͎̟͚͙͚ͩͪ̌̉ͩͮ̓̆ͧ̂͐ͦ̀͢Z̸̡̿̍̍͗ͦ̀̕͏̝̱͚͓a̛͓̺͎̣̣̗̹͓̲̝̭̱͉̹̯͓͕͔ͤ̄̿̂͌̿̈́̾̇̾ͯ̋ͬ͑̓ͯ͗̐͛͘ͅļ̛̜̼̟͇̼͎̺̠͚͔̮̊̈́̓̈́̂̈́̃̎̄ͩ̃ͨ͑̓ģ̷̧̝̘̪̜̟͉͖̯̫͚͎͙̠̺̭̯̤̿ͥ̽͆͌̾̉͞͞o͌̆̆̔̆̓ͣͮ̂͗͗ͬ͋̓̄͜͜͝҉̴͉͎͓͉͔̥̮͓͕̳̖̼̲̭ ͉̝̯̜̲̳̜̑̌̌̓̑ͧͧͫ͒͡͡ͅt̼͚̞͓̦̞̉͐̅͗̃̐̀ͯ̋ͧ͜e̴ͬ̑ͫ̽ͥ͏̛̳̟͈͕̺̦̯̙̺̻͖̣͠s̛̉̓̀͒̐̔̅̌̈́̅̚͏̨̲̗̹͚͖̺̰͉͈̖͖͠t̨̧͍̻̹͇̜̞̖͓̟̩͓̹̝͎̅̄ͤ͆̊͐ͫ̓ͨ̔͗͆̊̊́
̛ͣ̊ͯ͊͋͛̑̋̒̓ͩͨͯͩ̐͏̛̝͇͚͎̀Z͇̗̭̝̭̩̻̮̐͛̈̏ͫ̔̑̀̓͞͠ͅa͗͒̾̿̔̐̌̋ͥ͊̋ͭ̊͑̒͊͊̕͟҉̵͕̙̼̮̖̭̞̜̬̗̰̗l̶͚͇̜͔̝̯͓̬̲̺̘̮̺͍̩͚̣ͬͣ̈́̓́̄ͦͪͮ͆ͫ͂̂ͥ̍̀̚͟ͅḡ̸̶̛̯̱̥̦̘̹̗̺̬̰̫͖̋̌̔̆̈́̋̍̍ͭ̿̀ö̵̭̣̭̭̙͙͚̞̰̙̼̜͚̰̏ͧ̈́̎ͅͅ ̀ͦ͗ͭͪ̊ͦ̑ͦ̈̈́ͪ̿͒̐ͯͪ͗̚͡͡҉̡̖͔̺͇̺̮̝̫͉̹̤̖̣͖͝t̴̵̢ͫ̈́̄ͬ͛̊҉̶̠̩͔̹̫̥̝̲̰e̸̵̖͈̯̰̤̮̮̼͓̣̤̺ͮ̍̔ͯ̌̆̆ͧͧͩ͛̅̚͟ͅs̸̢͕̳̼̗͎̣͙̯̳̻͇̋͛̔͗ͭ̈̉̓̈ͯ͒̉̐̉̀͒ͣt̸̯͉̰̗̯͕̬̼̀͊̇ͯͤͦ͗ͥ͗ͥ̐ͦ͞ ̶̙̮͓̜̲̙̖̬ͭ̇̍ͭͪ̽͗͟͡Z̷̛̟͚̥̘̻̫̺͎̦̳̞̜̟̩̻͙̻̎ͬ͂ͫ́ͅaͨ̋̈́̈ͫ̇̓̋̿̋ͯ҉̡̞͇̘̮̥̦̬͎̻̜͚̗ͅl̴̛̥̼̰̝̱͚̠̺̖͎̀ͧ̏̐ͦ͆̓̏͒͒͂ͭ̌ͯͫ͜͟g̸̳̰͇̙̮̣̩̹͈̻͖͈̬̟̱̦̣͒̑̉͆̄̈́̎̒͂̊ͨ̾͢͜͡ͅơ̷̤͓͙͕̪̗͔̜̞̮ͭ͑ͣͬ̅̆͆͂̑̂̈́͡ ̢ͭ̎͛̉ͦ̿̏͏̸̰̬̯̣̮t̂̊ͩ̈́̋͏̺̲̦̖͕͈̭͓̻̥̦͚͍̙̼̰̀e̱̳̘̦̟̮̣͓̺̭̤͍̗͙͛̊̽̿͒ͨͯ̕͜s͌͆̂ͦͣ͌͒͊͏̶̷̦̝͎̮̦̠̺͈̻̫̭̻̫̗͈͇t̷̞̖͙̣͚͇͙͇̗̗͓͈̫̪̲̼̮͇͋̓̊̌ͪ́̔̽͂̓̒͋ͫ̈́̈̑̽̕
̷̴̺̹̫̜̗̮̼̼̞̘̝̋͌ͥ̓ͣ̾̓̆͛̆̈́͆͌̈́̚Z̷͇̗̻͎̣͍̹̺̹̼̤̻̣̞̮͕͇ͭ͑ͫ͒͗ͥ͌ͩ̐͌̆̌ͯ̀̚͠͡͝ͅͅą̖͉̲̺͇̖̙̊͌̃̾ͭ̔ͮ͠ͅl̽ͦͫ̇҉̴̩͉͈̦̼͎͓͓̝̤͙̫͍͙͘͠͡g̛̪̙̮̼̖̦̦̝͕̫͇̦̱͕̙͇͍ͮ̓ͩ̋̿̾̽̍̐͂͌̎̈̍̿̚̚͘͝ǫ̴̮̭͚̟͕͈̻̓ͨ̄̑̈̐͋̀̆̓̿ͧ̓ͭ͊͝ ̧̝͔̭͆͋̌̄̈̓ͬͮͫ͜͝͠t̛̛̥̖̻̤͚͇̰̯̬̙ͤ́͆ͨ̌͡͡ẹ̣̹̘͚̞̼̗̜ͤ̉ͣ̿ͬ̓̆̔̓͂̈́ͧͥ̊ͫͯ͌̈́ͦ̀͘ŝ͛͗ͫ́͆͠҉̙̭̲̤̪͙̜͘͜ͅt̓ͣ̒̂ͨ҉͚̫̗̗̲̙̲̯͍̻̻͢ͅ ̵̸̋͒̉̎ͬ͐ͫ͗͋̇̅͐ͮ͘͏͈̟͎͙̻̘͡Z̡͒̉̌͋͏͏̡̖̱̖͉͉̻͉͚͍̟̝a̋ͥͫ̒̾ͩͮͧͭ̍̽̈ͣ̿ͨ͗̆̍̚҉̛͏̣̯͉̰͈̠͚̖̦̰͔̙͇̦͎͓ͅͅl̲̰͈̹͇̺͚͚̤̱̗͔ͯ̒ͩ̀̇ͦ͐͋̾͑̃ͩ͑̐́̚̕͡gͬ͆ͣ́͌̽̒̐̒̒̌̆̐̅͏͏̷̨̡͇̲̻̗̞̩ó̴̧͖͍͇͚̹͉͇̪̟̙̘̜̹͔̤̿ͪ͛̈́̏͆͑̎͂̉̾́̕ͅ ͆̓̂͊̏ͩ̏ͩͯ̑͂̉͏̴̦͇͍̬̱̖ͅt̶̨̮͕̬̣̟̝͆̇̀͛̓ͣ̀̎ͥ̾̾͒ͭ͒̆͟ẻ̛̐̋̎͆̂ͦ̂̋͟҉̢̛̬͙̞̻̹̯͓͈̝̬̟̯͎͍̻͚̗̼̰s̶͑̉ͯ̑̂͗͂ͩ͗̂͂̐̀̀̚͞҉͉̣̺̞̱t̸̷͈̼̖̬̦͕̪͓̯̺̺̞̳̯̪͇̥̣͂ͧ̓̇ͫ̒̆ͭ͊̋̀̍

8

Thanks for the demo!

9

here is best alternative of zalgo text try this Zalgo Text

Ț̸̳̙̟̩͈̻͔̰͎̲͚͕̑͛̈̒̊̓́͗̇̉͋̽̐͝ͅh̵̡̛͍͉̤̍̎́̀̏̓͗̀́̽́̎͆̌̓̕ͅî̷̢̛̗̆̂͐̈́̋̍̓̓͝͠͝s̶̡̳̗͔͖̼͈̤̟̾͐̚͠ ̵̤̖͖̋̇́̄̉̀̚͝ȋ̸͉̰̤̯͒͆̈̍͋͆̓̀̈́̆͑̎̚͘̕͠s̸̡̛̾͊̉̈́͛͐̾͗̆̒̊͂͘̚ ̴̹̼̦̲͎̀̓̀Z̷͈͗͐̈́̒͌̎̿̂͗̃̊̔a̸̧̞̮͕̦̥̗̰͇̗͚̰̬̻̥̾̿͑́̽͋͂̍̿̾̋̉̏̕̚l̵̨̧̫̙͈̻͈̪̼͕͉̜͕̙͉̺̀̏͒͋̄͠ǧ̷̪͍̗͙̯͖̞̫̜̈́͛̈́́̎̃̋ơ̷̢̨̘̭̜͚̼̼͎̓̂͌̅́̿̐̀̊̈́̈̽͆̚͜͝ ̴̛̗͇̩͉̯̱̠̗̼͔͇̲̌̿͒̑̏͗͛̎̌̏͋̾̌̎̋T̷̼̽̔͗̔͊e̵͈͒̍̈́̉̐́͜͠x̵̲͈͈̀̀͊̂̑̇̎̅̌̏̀̚ͅṯ̴̨͈̔͋͘ͅ