9. Securing Web Applications

[@alimatthew428]

you are very great lecturer i wish i get in touch with you.....keep doing the great job

[@luckynumbersevuuun]

at 37:20, one of the most effective use of the CSP is to limit where javascript can be sourced from. this will get you pretty far down the road against most XSS and other hybrid attacks.

[@PMA65537]

43:00 DROP TABLE tablename; DELETE is used for deleting (some) records from a table.

[@aidanbrumsickle]

Use prepared/parameterized statements for SQL!

[@armandkruger911]

Thank You! Finally!

[@voikalternos]

fascinating to learn how things are different 10 years ago

[@dzungnguyen]

this is the great course, I know a lot of stuffs here and why it's important. Finally, I can understand and visualize how these things work

[@mpumelelozulu6268]

Lloyd""l""whale 'll)"lhll

[@mpumelelozulu6268]

La Farrell and ll""low cost a"h

[@mpumelelozulu6268]

Lips". I know"

[@mpumelelozulu6268]

L"ballthe llllrllllll l"last year last time"and l"lljhl"lbs lll"lh""lhhllllh

[@mpumelelozulu6268]

H lluh"rll lull""lljll. L"hotel"lowllhlhl"lull ll"ltlllllhllljl"Ljubljana"lrulhllllhlhplj, Ljubljana to"llhlljh Lal

[@armandkruger911]

Input Validation , parameterized queries, static & dynamic code analysis is the future to secure code development

[@marveladeguitar]

In the third XSS example that didn't work @10:22 , judging from the web server logs @10:43, the stripping was already done when the request hit the web server. Without testing this, I'm going to take a guess and say that it's the semicolon that tripped this example; not a browser mechanism that filtered the response and definitely not because of the X-XSS-Protection header being set to 0. That header will only tell the browser what to do with the *response*. It doesn't know about that response header yet when it sends the request.

[@ClearlyCero]

Quite a lot to think about, so many more vectors than I knew about.

[@christophersiwale7218]

still appreciating the video!

[@GamingBlake2002]

alert('Great video!');

[@armandkruger911]

#include int main() { std::cout

[@UndercoverDog]

Hecker

[@jovanyaldayrtoquerofranco9214]

Excellent!!!

[@Greatfulone]

I did not catch how putting the sensitive info in the DOM keeps JavaScript eval() from accessing it.

[@lets_discuss5352]

Prof. Mickens, for the SQL injection attack, would using stored procedures be a way to prevent malicious content being used for injection?

[@seductivewalrus5587]

Yes. You use algorithms to "sanitize" all user input. In industry this is known as "input sanitation".

[@novawarebr]

@@seductivewalrus5587 Do you know any tutorial/course about this subject? I'm trying to find it on youtube, but it's very hard.

[@bluemagicuk]

talk was fire AF

[@EdigleyssonSilva]

Great lecture!!

[@blenderpanzi]

Why is bash even looking at the contents of env vars if they are set via setenv(), let alone under any circumstance interpret it as a function? That does not make any sense to me.

[@SportsIncorporated]

I went to college in the 1970's. Instructors are still using a blackboard and chalk.

[@TDRinfinity]

I would say most schools use dry erase white board. Some of my classes use ipads or surfaces or something like that but it usually isn't as good because you just get the one screen with a smaller buffer

[@musilicks]

You only get blackboards and chalk if your tuition is +50k/term

[@predatorBr]

Ways to stop SQLi 1- User prepared Statements 2- Stored Procedures 3 - WhiteLists And a mandatory is never ever trust user input, even if it an internal system. Even worst yet sometimes. Use all because this called security by depth.

[@omarkhan1491]

use a framework like django?

[@Kiolesis]

Great! 😀

[@freddykakonde9144]

super

[@redstoneprojectrules]

Lol, "how to prevent xss access to secrets" "hand them out as a capability and store them plain in your html"...

[@mr.almezeini647]

i didn't know Chris rock was into IT 😂😂

[@alexandrudescultu7086]

Securitate layer 7: www.popnews.ro/

[@SportsUniqueFootage]

I think this is just me but this is a bit hard to follow. Not a fan of teaching with whiteboard and chalk.

[@rafaelnacha1788]

9:00

[@jongarcia982]

I can't believe he is writing on a chalkboard. The only way it could be less efficient is if he was engraving stone during the discourse. This is insane. A projector would be better.

[@StijnHommes]

The easiest way to secure a web app is not to use it. That way, it can't cause any security breaches. We don't need them, so it's not that hard to avoid "web apps" and use real apps instead.

[@mikecaldwell8417]

Wow I remember my electrical engineering classes at a new york state university to be much more complicated then these MIT computer science classes. This is kindergarden stuff compared to electrical engineering or the many math classes I took

[@seductivewalrus5587]

This is cybersecurity, not math.

[@mikecaldwell8417]

@Don Pablo You angry because compared to us older guys you idiots are not even half as smart as we were when we were in college? You mad because you are in the dumbed down version of education and you probably still barely get by. Now go back to your cell phone and stare at it for a few more hours because that is all you young dolts can do

[@mikecaldwell8417]

@@seductivewalrus5587 Duh I never said it was math, fool. I said it was easy compared to the subjects I studied at a less prestigious school.

[@ishashka]

Well, that's because cybersecurity is a lot more of an art. There's no definite answers, there's no equations. You have to rely on knowing what has gone wrong in the past, so that you don't replicate those mistakes (and no one has a 100% complete list of those) as well as your imagination: how will people try to abuse my website? The concepts presented in the lecture aren't complicated, because they're just the most common, basic ones, but they're essential for a cybersecurity specialist to know. And in practice, their job is hard and messy, because when you're dealing with many layers of software, each with its unique quirks and bugs, there's no way to predict every way that's going to be abused.

[@mikecaldwell8417]

@@ishashka I already know about cyber security since I have been in high tech working for a major software company for decades. My point was that I learned much more complicated things at a state college in my electrical engineering courses then what these MIT students are learning. Of course, my major was considerably more challenging then a computer science degree. I would expect at a top engineering school they would be teaching much more complicated subject matter such as encryption then this baby stuff.