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So there's plenty of bugs in the JS interpreters, and you can use those to do regular exploits and run arbitrary code.

So there's plenty of bugs in the JS interpreters, and you can use those to do regular exploits and run arbitrary code. Separately is escaping the sandbox due to a bug in the verification. JS is probably far easier to secure, since all the APIs are "safe" to call. That is, there isn't a huge JS stdlib that needs to be restricted. Like brainfuck-there's no way to make dangerous calls. Whereas Java has a huge stdlib that's accessible, so you're fighting an uphill battle to lock it down.

Posted by MichaelGG on May 15, 2015, 10:15 PM

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So there's plenty of bugs in the JS interpreters, and you can use those to do regular exploits and run arbitrary code.

MichaelGGMay 15, 2015, 10:15 PM

So there's plenty of bugs in the JS interpreters, and you can use those to do regular exploits and run arbitrary code. Separately is escaping the sandbox due to a bug in the verification. JS is probably far easier to secure, since all the APIs are "safe" to call. That is, there isn't a huge JS stdlib that needs to be restricted. Like brainfuck-there's no way to make dangerous calls. Whereas Java has a huge stdlib that's accessible, so you're fighting an uphill battle to lock it down.

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