JavaScript is a text-based programming language used both on the client-side and server-side that allows you to make web pages interactive. Single-line comments are generally used to comment a part of the line or full line of code. The interpreter will ignore everything to the right of this control sequence until the end of the line. The JavaScript comments are meaningful way to deliver message. It is used to add information about the code, warnings or suggestions so that end user can easily interpret the code.
The JavaScript comment is ignored by the JavaScript engine i. Variables in JavaScript and most other programming languages are stored in two places: stack and heap. A stack is usually a continuous region of memory allocating local context for each executing function. Heap is a much larger region storing everything allocated dynamically.
Simply, a constant is a type of variable whose value cannot be changed. Also, you cannot declare a constant without initializing it. The values inside the const array can be change, it can add new items to const arrays but it cannot reference to a new array. Lucas Kauffman Lucas Kauffman Fuzz testing or fuzzing is a software testing technique, often automated or semi-automated, that involves providing invalid, unexpected, or random data to the inputs of a computer program.
The program is then monitored for exceptions such as crashes, or failing built-in code assertions or for finding potential memory leaks. Fuzzing is commonly used to test for security problems in software or computer systems.
You need an IDS which detects this behavior and blocks it automatically. This is what i can understand. Its encoded in hexadecimal. The real value is in ascii. He allows users to comment in the comment section of his site. A user tried to make an attack through a comment, but his dynamic web site auto-escaped special HTML characters to prevent the attack from ever being executed. Buddy read it again "Might Be". I explained attacker's mindset here.
Also in my comment i said "Looks like he failed as it was detected as comment without breaking anything on your blog ". You are re-iterating the same point. Friend, I agree we have a lot of agreement and make similar points. But I downvoted as you claimed this might be some vulnerability --I see no reason for that conclusion--it only indicates his site takes comments and is protected against this specific type of attack.
I'll remove my downvote if the claim this signifies a potential vulnerability is edited away. And if you remove the part about it being shellcode it really isn't--shell code is generally machine language--this is obfuscated JS , I'll even give you an upvote that's not why I downvoted as terminology changes. Why i said there might be a vuln as the attacker would have tried to get in after he would have seen this kind of vuln exist as in previous versions, wrong attribution or he might have done something wrong thus was not able to leverage the potential vuln.
Many a times disclosures does not provide with significant details allowing anybody and everybody to exploit it. That's what i thought. But in the hinsight i should have decoded it and written the details instead of thinking from attackers mindset as its not something that complicated.
And Thanks for your Input. I Really appreciate it — oldnoob. I don't see any indication those are involved here. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete?
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