Running an SQL Injection Attack - Computerphile

Just how bad is it if your site is vulnerable to an SQL Injection? Dr Mike Pound shows us how they work.
Cookie Stealing: • Cookie Stealing - Comp...
Rob Miles on Game Playing AI: • AI's Game Playing Chal...
Secure Web Browsing: • Secure Web Browsing - ...
Deep Learning: • Deep Learning - Comput...
Tom Scott on SQL Injection: • Hacking Websites with ...
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This video was filmed and edited by Sean Riley.
Computer Science at the University of Nottingham: bit.ly/nottscom...
Computerphile is a sister project to Brady Haran's Numberphile. More at www.bradyharan.com

[@martinpet100]

How to avoid jail: "I`ve given myself the permission"

[@elisttm]

officer i swear what i did wasnt illegal, i gave myself permission to rob him!

[@georgek4416]

@@elisttm ok ur free

[@ajinkc1031]

XDDD

[@revenevan11]

@@elisttm this reads like a privilege escalation exploit lol

[@bxnkroll]

I'm using it

[@barkeeper7887]

imagine not giving yourself permission to do this on your own website and then you sue yourself, win the lawsuit and then land in prison

[@costafinkel]

Well, at least you would be able to win your own money. Thats more than what can be said for some married / divorced folks.

[@barkeeper7887]

You’re pretty damn right m8

[@aviddavid8793]

mmmMM the court fee and if you have 1000 iq your lawyar takes about 30%

[@heeheehawhawheehee]

Then become mr robot

[@imho2278]

Write it off as a tax deduction.

[@soweliLuna]

the intro had "" and the outro ""... smart... love the attention to detail

[@rixogtr]

what that means ?

[@rixogtr]

oh now that makes sense :D Thanks

[@andy.robinson]

Being the pedantic developer I am, it's more like XML since HTML doesn't support a tag.

[@sirturnables]

What are u doing here if u don't know that?? lol

[@toyotaae86truenogt-apex97]

@@sirturnables learning.

[@karldavis7392]

Decades ago, my brother named his bowling team "select *". This was in the early days of computers, so there wasn't modern security. The bowling alley printed the statistics, and when his team arrived, the employee presented an entire ream of paper and demanded they choose a different name.

[@bsvenss2]

Hehehe... funny. It's like the first Unix systems where you couldn't have a user named "Ed".

[@karldavis7392]

@@bsvenss2 Would it start the editor?

[@Deeeve]

@@karldavis7392 it would lol

[@randomuser-vs3oe]

alright youtube, this has been in my recommended for 2 years now, ill watch it, you win.

[@universenerdd]

Underrated

[@jamesmccabe2286]

Interesting and informative, but the other guy is almost as basic as "So, what's that in front of you? Is it a computer?"

[@user-ys9kg6ye8u]

lowkey joke

[@sachinfulsunge9977]

You just wasted 2 years

[@user-ys9kg6ye8u]

@@sachinfulsunge9977 hahaha

[@travispetit2410]

Imagine naming your child "LIKE'%' UNION SELECT * FROM TABLEBASE" so that when they register its name, you'll get the information on all of the country's database

[@ilyasssaadi9594]

Travis Petit probem is, you should rather imagine that names of people would contain else than alphabet (numbers and symbols)

[@1wOOrking1]

Why is PHP better then Python please?

[@Minecraftsomebody]

^^^^^^^^^^

[@siisihqdaa]

US government sites use Drupal which uses PHP, so US government actually uses PHP

[@ithinkitsaurus]

my birth name is actually ':-- DROP DATABASE

[@clementella]

Me: Can I SQL Injection Attack your website Me:Sure

[@katherinegonzales4916]

That's what he did

[@kubadzejkob332]

Imagine he has schizofrenia and fires a lawsuit against himself.

[@kubadzejkob332]

Or simply changes his mind.

[@Shubhankar31]

*Mr. Robot intesifies*

[@1kennylo]

😂

[@bennyboy968]

I love how he explains things non-pretentiously. It seems a lot of people in the computing field really like to think they're better than everyone else.

[@AngrySkipperGC]

Prince Benny it’s usually not their fault. Having worked with Tech Mobs for the Gold Coast commonwealth games, it’s just how IT dudes are and there is actually a job for people to take what the IT guy says and explains it to the project manager in a way that makes sense.

[@morten1]

Yeah he's a great teacher too

[@americancitizen748]

Or with a foreign accent so heavy you can't even tell they are speaking English.

[@froyorex4856]

Yeah we do 😎

[@MrX-nc8cm]

Yes we are

[@pandasworld4168]

The interviewer thought the text editor was already the hacking part

[@davidprice6462]

I noticed his excitement as well.

[@arielfenomenon9233]

I loved when he nervously asked...so where are u typing that now....as if the whole world was going to blow up >^

[@paulaxa1]

you know he probably knows but he just asks for the content right?

[@georgek4416]

He knows

[@andrewhennessy620]

at least he's willing to learn

[@mattshnoop]

It’s crazy how different my understanding of this video is since the first time I watched it. I watched it back in high school, now I’m halfway through a university degree and have taken web development courses... Funky.

[@sadimehti9934]

Got Same feelings haha

[@BaconTrainss]

i feel attacked

[@shrimps69]

Just came back after 5 years and I'm second year into IT

[@tommytomtomtomestini3894]

Instructions unclear, NSA is outside my house.

[@Drummerdude998]

😂😂😂

[@baho644]

John Doe FAV hahahahaa

[@adamwood1706]

😂😂😂

[@blackham7]

WTF HOW DID YOU GET NSA OUTSIDE YOUR HOUSE OBVIOUSLY YOU UNDERSTOOD THE INSTRUCTIONS ARE YOU IN PRISON NOW?

[@thatonegooze]

blackham7 wooosh

[@MrDeeb8]

Thank you Peter Parker

[@tomascanevaro4292]

He's the cool version of Peter Parker, from Spiderman 3

[@ashharryman19]

Underrated post

[@RedditNovelties]

I thought I was the only mofo thinking he looked like Peter Parker from Spider-Man 😂

[@warpman345]

Or Frodo from the lordof the rings

[@DanIel-fl1vc]

FRODO!

[@zanzlanz]

This is a very well done demonstration! I liked being able to see how it worked in an actual example. Someone ran one of those scripts on my site to try to hack my database a couple years ago. The only thing it helped me realize is that I needed stronger spam protection, because it left thousands of failed injection comments on one of my pages, haha.

[@ZweiSpeedruns]

That sounds more like xss than sql injection

[@jarmo_kiiski]

You need some of that htmlspecialchars(), a stripslashes() and str_replace()

[@empiter3359]

htmlspecialchars() for the output as xss protection. in case of php & mysql it would be mysql_real_escape_string() against sql injections in quoted values. but people shouldn't think they would be save when just using these functions. someone can do an sql injection without using any control chars at all if you didn't put quotes around the variable in the query: for example "SELECT * FROM posts WHERE postId = $postId"... the value of $postId could just be "1 UNION (SELECT 1, 2, 3)-- " without any quotes. in this case you would be save with casting the variable to an int, but best practice in general is using prepared statements.

[@empiter3359]

meh, forgot about the ; in the example injection - but you get the point... use prepared statements / stored procedures :-)

[@AchrafAlmouloudi]

No, it is a SQL injection attempt, not an XSS attack, the hacker was using the comments form as a gateway to the database, just like Michael in the video used the search box to send malicious queries. The difference is a comments form will store those requests as comments while a search box doesn't store search queries.

[@samuelokirby]

Okay KZbin, I'll watch it. Recommending it to me for years.

[@armonfrohlich6348]

The whole computerphile series is just great. Much that I can only see through here, although I speak only moderately English. Your enthusiasm and your fascination for the topic leaves even a slightly boring topic to last interesting. And that with every clip.

[@SuperManitu1]

The hacking videos are the best and most interesting for me as comp science student. Keep them coming!

[@Ownage4lif31]

Just wait until you learn MySQL and Javascript. Then you'll be able to learn some very interesting things.

[@SuperManitu1]

BlackenGames lol, I can program in over 20 languages, including those two. The point is not to learn them, but to learn against them. Possible weaknesses you have to remember when programming.

[@Stigsnake5]

>Javascript When I'm feeling like a masochist perhaps.

[@SuperManitu1]

Blaze I really hate Javascript, but you should try typescript. I have made my peace with javascript that way

[@Ownage4lif31]

SuperManitu1 Then you should be able to exploit things easily. I don't know how to program in a lot of languages. Only 2 and I know how to do some nice exploits.

[@TheMrYakobo]

I thought I loved Scott. Then I discovered this man, the man that doesn't pronounce SQL like Sequel. He's brilliant

[@denvernaicker8250]

oh snap i've been pronouncing it incorrectly

[@jackrogers1115]

Us in the UK dont tend to prononce it sequel...

[@13am22]

@@jackrogers1115 Well isn't Tom Scott from the UK, though? You see, he's the one in question who tends to do so.

[@jackrogers1115]

@@13am22 what

[@jackrogers1115]

In the uk, we tend to say s q l, not sequel. Thats what i'm say. And yes hes from the uk

[@habiks]

..what is illegal? running sql attack or making shitty web apps? Coz my real name is "'; DROP table users; SELECT '"

[@atomheartother]

Both.

[@modernkennnern]

releasing the information is illegal.

[@jan_harald]

attacking someone without their permission is illegal by law making shitty apps is illegal by community

[@Padarom]

Making your application insecure towards attacks and putting your user's sensitive informations at risk of being stolen and released is illegal. @jan harald: What is "illegal by community" supposed to mean?

[@harrisonharris6988]

I wonder if you could change your legal name to that.

[@JDSileo]

This is defense against the dark arts for Computer Science

[@PaulBunkey]

This is the best explanation of SQL injection video ever. I've recommended it to a non-technical friend and he got the info-sec job.

[@antiHUMANDesigns]

I made a website many years ago, and obviously made sure SQL injection wasn't possible, and I also logged stuff, and I did see some people trying to do SQL injection on my website.

[@211212112]

peas give me website address and permission to practice pen test

[@antiHUMANDesigns]

@@211212112 This was well over 10 years ago. That website no longer exists.

[@jmvr]

anti/HUMAN Designs :(

[@AriannaEuryaleMusic]

So the best defense is to disable the "Search" box

[@Ioganstone]

Only criminals need search boxes.

[@saeedbaig4249]

The best defence is to take down your own website, destroy your computer, isolate yourself from technology & civilisation and go live in the woods.

[@ShokoCC]

No client can't hack you if you have no clients #LifeHack @@saeedbaig4249

[@adamatlas1113]

Nah, silly lol Just ban "UNION" from your search box...

[@chadtowers8556]

From memory it's possible to use your browser search bar to run an SQL query

[@Wolle704]

I always struggled with some parts of this. But I finally understand how it works so I'd have to say this is probably the best explaination of SQL injections I've ever come across. Thanks

[@Towzlie]

That's why you use PDO and bind requests. Also don't forget to sanitize user input before the query

[@BladeGamester]

OKAY KZbin I FINALLY WATCHED IT! This video has been in my recommended for years now.

[@Adam92326]

That's why I use prepared statements everywhere, even when I get something from my own database, and do a query on something else.

[@baldeepbirak]

Useful to see as this does work on my website.

[@Rosson311]

Baldeep Birak so what website you run.? Asking for a friend lol

[@TeeKayMTrove]

Cheeky.

[@gavbag1234]

Hey now, let's none of us go Ball Deep on Baldeep.

[@IAmESG]

mind if I take a look on your website?

[@cosminxxx5287]

@@Rosson311 but even as a joke you shouldnt try it cause when police will be at your door ,it wont hold honestly. like, i go with a knife at your house and you call police and i tell them 'oh ,its was just a joke,for fun,didn't mean to do anything'. not so sure someone will bite that even if it would be truth.so yea, don't even think to try just to see if it works.you would be the dumbest hacker in that jail yard.

[@eminem2]

Imagine explaining that to inmates in jail: "I... I... put the wrong text in a database on purpose". Inmates be like: "Somebody get me a restriction order, you ain't coming 5 cells away from me, what is wrong with you!"

[@Jibblets]

Funny haha

[@Nalopotato]

One of my accomplishments at my first job was rewriting all of our (then) inline SQL queries and stored procs in C# to implement SQL injection prevention! It was a lot of fun :) And very rewarding when I was done

[@skyone9237]

I never understood SQL injection untill I watched this video...bow to you..🙇

[@Lmaoboat]

This guy is by far the best on this channel. Especially with his practical examples!

[@PashaSiraja]

A 2rd degree attack would be me naming my children ";--"

[@PashaSiraja]

LOL I miss-typed 2 instead of 3 hahaha

[@ihrbekommtmeinenrichtigennamen]

Bobby Tables would be proud of you!

[@GlassCurtain]

Little Bobby Tables!! :)

[@CuZoSky]

2rd ? "secord" ? :))

[@ihrbekommtmeinenrichtigennamen]

CuZoSky twoerd

[@Werdna12345]

Would love to see a video on second order SQL injections!

[@GetCTOwned]

Reminds me of the days when I had to 'recover' lost wordpress credentials for customers. Luckily web security has gotten much better but this is still a very valid video.

[@MrSkinkarde]

Wordpress has never been secure in any way And it should never be used commercially

[@darshandani1]

I learnt more from this video than my entire DBMS coursework.

[@abandoned7501]

Quantity in stock: A D M I N

[@Purely_Andy]

Product name: G E O R G E

[@nicktech2152]

WPF in C# 2010 Book on the background - Busted!

[@feliper.150]

Alternative title: Tyrell Wellick runs an SQL Injection attack.

[@PongiPlaysGames]

XD

[@club6525]

Just to clarify: It's not a malformed query. You're actually getting outside of the query that the website wants you to. Basically, you get to create your own little query which is pretty terrible cause then some dude can query for everyone's passwords.

[@dhananjaydj543]

I'm only halfway through the video, Its easy to understand what he is trying to say due to those practical examples in a simplified way. Its half a decade old and still best videos to watch out for on this topic.

[@deejaykaye]

This guy is quality, I could listen to him all day

[@Rippertear]

you gave yourself permission? is that in writing? is it notarized? who knows, maybe you'll change your mind and press charges on yourself!

[@B20C0]

The most scary fact about this is that it's still an issue in 2016. I did this kind of stuff 15 years ago and back then I already thought "this is way too easy". The bad news was that there were no such things as prepared statements, so you really had to do all the work with escaping.

[@_martinedwards]

That nearly finished Rubik's cube on his desk is playing havoc with my OCD

[@Sharpless2]

here to remind you of that unfinished cube lol

[@_martinedwards]

😭

[@tomchapman128]

"Ah, I'm sure my website will be fine." *checks it* "ohno"

[@emberdrops3892]

actually underrated 😂

[@mariadb4627]

Oof 😅

[@Suicidekings_]

SurprisedPikachu.jpg

[@KacangNgoding]

"anyway..."

[@chasebrower7816]

You don't go to jail if you don't get caught.

[@chasebrower7816]

Iceborn Gauntlet probably you.

[@36nuts18]

Chase Brower no, not just me. EVERYONE.

[@rasheedhadi2714]

Frank zapper

[@malharjajoo7393]

you don't go to jail if you never try to learn this stuff. * makes the meme face *.

[@americancitizen748]

That's what Hillary told me.

[@DrRChandra]

user name consisting of SQL? must be Little Bobby Tables

[@tiggerbiggo]

rchandraonline I know of that site, but this is a full in depth explanation as to exactly how it works.

[@fluck6159]

I will name my son as Little Bobby Tables

[@jcfawerd]

I suddenly remember a man named "null"

[@GioGziro95]

Where's the "Students" table?

[@CreamyRootBeer]

Oh, I love that comic. "Oh little Bobby Tables, we call him."

[@VexillariusMusicEDM]

Dude this guy is crazy I love watching vids with this dude

[@jbyagenrok]

Felt like I was listening to an SQL injection tutorial as presented by James Acaster. And loved every second of it of course

[@raiker02]

alert("hello world"); -I'm in.

[@hrnekbezucha]

Now this is art. I can totally imagine people do stuff like this cause it's fun. Like chess.

[@orlagskapten9829]

Juan2003gtr why are you calling him a noob?

[@stylz1]

Like gambling.

[@dustin_echoes]

Thanks! This video explains it better than my database subject lectures.

[@SpencerFcp]

I used to work for a consulting company and you'd be surprised how shitty the majority of companies are at protecting your data. Mostly smaller businesses, but even some of the large ones lack basic security measures. It was pretty eye opening.

[@bobbyboygaming2157]

this explanation is so far superior to the other guy's coffeeshop explanation. The visualization is very important.

[@leonhill8447]

As a SQL beginner this was super helpful, thank you.

[@SpencerDavis2000]

this was one of the most interesting videos I have seen in a while. gotta watch more now

[@combatking0]

When putting together a SQL driven site, I put all text input variables through a function which filters out all potentially hostile characters and replaces them with something which cannot be interpreted as SQL code. It could also be possible to get the PHP to check for multiple attempts to submit SQL injections. One or two could be accidental, but more than that could be viewed as an attack, so I could make the PHP block all traffic from that IP for an hour, or return some decoy tables, or even a fake page warning the hacker that a virus is being uploaded to their computer, complete with a progress bar :)

[@13am22]

If you're still learning PHP, SQL and all that stuff and didn't already - please have a read on PDO and prepared statements. It's the "new" easy way of dealing with everything. :)

[@elliotc4268]

make it return what they would want to see, but the wrong information. a fake error or a fake full table

[@raf.nogueira]

This why we should use PreparedStatements in PHP , JSP, Servlets, C# and ASP.. :)

[@13am22]

That wasn't alway a thing before sadly. As of today, it's the only way to go basically. :)

[@joylox]

That program you had was literally something I had to make for a class in web development. I think it was the PHP class. Thankfully, we also have a mandatory information security course I'm in now and learning about these. We did talk about making sure quotes don't get in, which is important.

[@an3ssh]

Thank you KZbin for suggesting me this video after my DBMS exam .....wouldve done great if i had watched this video

[@vinkuu]

The password for user Joe is 'administrator'. ./john /vagrant/x --show ?:administrator 1 password hash cracked, 0 left

[@CJBurkey]

What was the salt?

[@vinkuu]

The whole hash is $1$V32.4G/.$0PKnjhXYUmYLJZZ8vEt/b/ so i guess the salt is 'V32.4G/.'. I'm not familiar with the format of md5, but in bcrypt that would be the salt.

[@CJBurkey]

vinkuu So, essentially, if you get into the database, you can use the salt that is with the password to crack it by brute forcing it?

[@vinkuu]

Yes correct. And that is the reason md5 is considered a bad choice of hashing algorithms to use for hashing passwords. It's very fast to brute force md5 hashes compared to eg. bcrypt with a cost setting of 15. It directly equates to cost (€) of the brute force cracking setup.

[@ZombieCakeHD]

Or just type in administrator??????

[@kimlau4285]

Me: Going through lecture slides to past my sql exam. You: Playing black magic with sql query.

[@Rougeman0]

I really love how Mike stepped up his game lately. Easily one of my regulars on Computerphile, keep it up!

[@KiraPlaysGuitar]

"It should have used that single quote as a character, not as a control structure" damn that is really interesting and cool... Please (universe) give me the determination to get through HTML/CSS/JS/SQL... It just seems so neat and handy...

[@chaozkreator]

I like how the interviewer initially couldn't get around the fact that all the instructor was doing is just writing out the "code" in a text editor.

[@colee6133]

the illegal part of this is having an unsolved cube on your desk with super easy PLL case :c

[@epicswirl]

“Where are you typing this?” Lol bro it’s just sublime 😂

[@ankithabhayan324]

Yeaa haha I don't have the paid version though😭

[@RohithRPai]

@@ankithabhayan324 you can use VScode. It's better than Sublime text in my opinion.

[@epicswirl]

Rohith R Pai I like atom I don’t pay for sublime either

[@ankithabhayan324]

@@RohithRPai but isn't vs code a heavy ide? My pc is potato with 1gb ram.

[@RohithRPai]

@@ankithabhayan324 oh man... With 1gb RAM I would go with vim or emac. But VScode (not Visual Studio IDE) is a not an IDE. It's a general purpose text editor that can act like an IDE with right extensions. I switched from Sublime text to VScode about 2 years ago. Haven't looked back since.

[@Johan-st4rv]

I got 15 years for sql injection one time absolute mad man

[@zyxcalxyz2007]

but did you though?

[@akaashik]

I got executed for MITM attack.

[@JaaoPonte]

I got a two days torture for changing the input type from password to text

[@sieghart0515]

I got sentenced lethal injection for typing on console

[@igniscorvata9562]

@@sieghart0515 I did a year and a half for getting on my teachers computer, taking a screenshot of his desktop, saving that screenshot as a jpeg then making that his desktop background... then removing his shortcuts and lowering his task bar.. so no matter how much he clicked, he got no where.

[@chrisalister2297]

Amazing how this was posted in 2016 and these were concerns I had to address in 1996. Filtering, stored procedures and permissions are your friend.

[@meptalon]

Subcription at first video :) This is the best explanation of an SQL injection that I've ever heard. Pretty sure that even non-coders would understand

[@srider33]

15:15 "Thank you for saving us some time." - Malicious people.

[@JonSmith-cx7gr]

What was the price for the 7mm nails? I'm re-upholstering a chair currently and think 8mm would be too long. Thanks.

[@BijanIzadi]

This should be basic education at this point, I’m so pissed nobody was learning or teaching this in school

[@Julian.Gilexs]

Depends on the school were you at.

[@joecurran2811]

Totally agree.

[@gonzalo4658]

the first person to put the word 'an' before consonants like 's' that start with a vowel. Thank you. An 'r', people. Say AN 's', AN 'h', AN 's', etc. I know I'm not the only one.

[@madnessguy010101]

I had known and understood what sql injection was previously, but I had never heard of blind sql attacks and using database-specific syntax in order to obtain information on the underlying database. Very informative video

[@FazleyRabbibd]

It’s 2022 and still a valid issue!!!

[@fyrchmyrddin1937]

Back when I was a "code monkey" AKA programmer, I was once officially admonished by my supervisor for wasting time putting in error trapping. "If the customer wants that, they can pay for it" was what he told me... That company is still around today - I looked them up. Apparently one of their core values is "Enthusiastic, Passionate and Fun" but the fact is, crappy programming is the norm, not the exception.

[@philadams9254]

"; DROP ALL DATABASES; --

[@josephthapa5848]

Thats bad

[@cristalmen9104]

:D

[@user-bp5fk9ln2h]

OMG...

[@chrisellis5860]

Only if the account has been granted DROP permissions. For a site that just shows records it should only be created and given SELECT permission.

[@fireboltofdeath]

+Chris Ellis Do you really think someone who isn't going to escape user input, would think about that? Because I honestly don't.

[@Codetutor-DemystifyCoding]

Just perfect!!! Rather than talking about how it's done, show how it's done.

[@Rhyden]

I learned more about databases in this one video than I did during a semester long class in Uni about databases.

[@TheLollercaster]

5:42 - this was the first time I dropped my jaw

[@satviknema8629]

"Iam doing this on my own website. So Iam giving myself premission". LMAFAOO

[@stylz1]

per

[@Sharpless2]

yeah it may seem like a joke but in reality breaking into your own house can land you in jail.

[@satviknema8629]

@@Sharpless2 wait wtf

[@MrMichaeledavis83]

As a learning web developer that uses php and sql all the time, this is pretty creepy. Luckily I learned to sanitize my queries early on, but I need to learn more about how hackers might attack a website.

[@jackcarter1897]

Decrypted the admin password just for fun XD That admin hash was: ‘administrator’. Just in case anyone was curious lol.

[@matlilly8795]

At one point, I created and maintained a server. You have to know how to crack your own system to know how to defend it. I launched campaigns against my server on a somewhat regular basis. Great explanation.

[@christophernetherton9389]

Insightful..Thank you for taking the time to go through it..Not a database guy but found it very interesting.

[@salatwurzel-4388]

Hint: Just use incognito mode in your browser to never get caught. You're incognito when you use it so they will never find out who you are. Easy solution.

[@romankrivocheev4434]

Ur joking, right? :)

[@salatwurzel-4388]

@@romankrivocheev4434 Yes. But i saw some people in the wild who actually think that way :D

[@Proletrolliat]

Or just use Tor

[@cameronjoseph5994]

@@Proletrolliat `would that work tho?

[@TahsinAhmed-yj9ns]

On a serious note does using free vpn work?

[@abbasssharara2393]

this is weak attack it can simply prevented by escaping chars or by creating sql stored procedures if you know how to use them.

[@Jaydon05]

Abbass: you'r right! That cross my mind too! :)

[@PaulStewartArck]

I never sanitize form input. Livin' on the edge!!!

[@stefanjud6345]

-> Dual is in fact an existing table, with just one column and row. The column is called dummy, while the content is just X. -> The INFORMATION_SCHEMA tables are shared with many other rdbms systems, to have a common schema for handing out information about the database.

[@moonmaan]

Nobody: Dr Mike Pound: "I've made a terrible website!"

[@MrRolnicek]

Can you put this website somewhere out there on the internet? Because I'm SURE a lot of people watching this would love to try their own injections and have fun with it.

[@bglobbi]

That would be pointless, first injection could be command to drop all tables and there would be nothing in the database and no fun for others. You can download XAMPP and create a simple database like this and do all queries like that inside web interface for PHPmyadmin on your own computer without even creating a separate website.

[@sei-core]

well if he would put it up somewhere, it could be taken down pretty easily in seconds: someone drops all tables, and voila, you can't even do anything anymore. This is like putting a bottle out on the street for everyone to break, if someone breaks it at first, then noone else can do it anymore because it's already broken.

[@MrRolnicek]

Yeah I realized very soon after posting that comment that it would have to be "refreshed" very often or just done so that it doesn't break for everyone and basically would be a pain in the ass to do.

[@sei-core]

Actually you can write your own script to do it. It's really just basic coding.

[@Schindlabua]

Check out hackthissite.org, they have some easy and some hard websites for you to hack into!

[@dmnck70]

"This is illegal you will go to jail" only if you're caught

[@dudlus2757]

This video pops up on my KZbin feed every week even thought I've already watched it 3 times, and I am still watching it again.

[@keeperkai999]

that's why you use frameworks that do sql injection prevention for you, or simply just escape the input you throw to your database.

[@kallikantzaros]

2:25 'This is bad news, right. We are in' hahaha

[@harrisonharris6988]

+Computerphile could you do a video on hashing/breaking hashes?

[@michaelpound9891]

Coming soon - using a 4x Titan X GPU server ;)

[@jimkennedy4509]

Usually you need to find out what type of hash they use. Then you could try a dictionary attack. Have a program try each word until the hashed value = the one you got.

[@hammode1538]

md5 :)

[@4pThorpy]

I think you're misunderstanding what salting does, you can reverse lookup a hash by having a list of hashed common words/used passwords, lists of billions upon billions of possible passwords...what salting does is change each hash with a "salt". So having two of the same passwords would produce two different hashes, thus making reverse lookup a less likely decryption method.

[@billy653]

Is this the actual Michael from the video. If it is I'm happy you're reading the comments. These videos have been quite refreshing on computerphile.

[@mienislav]

That has been done on my school's homepage xD

[@vito_vdovic]

Same haha

[@jongeduard]

Yep, this is what we have SQL parameter solutions for, in many programming languages. To prevent that trouble.

[@benjaminanderson1014]

Scary stuff! I'm certainly never shopping at localhost/shop/index.php again!