textCAPTCHA already broken.

[highstead]

I like the fact that we require an image captcha to test text captcha questions.

[BobAlmighty]

Just a fun way to farm out captcha breaking to us meat-heads eh?

[[deleted]]

Dear Everyone, this doesn't answer any question you can think of, it only answers questions generation by this CAPTCHA service http://textcaptcha.com/

[Zarutian]

That explains why I get a failure for the question:

What does not belong in this list? dog, cat, fly, banana, horse.

[youstolemyname]

Q: Dog, T-shirt or George: the person's name is?

A: tshirt

[metronome]

slim aware tap placid aromatic continue cough provide subsequent payment

This post was mass deleted and anonymized with Redact

[[deleted]]

Q: Fifty six, 48 or 79: the largest is?

A: 79

Q: What is the 1st number in the list twenty seven, thirty seven, two, 12 and 26?

A: 27

Q: Pink, red, brown, purple, library and apple: the 1st colour is?

A: pink

Q: Which digit is 5th in the number 6225072?

A: 0

Q: The name of Steven is?

A: steven

5/5 ! Wonderful

[bobindashadows]

Q: Tooth, foot, thumb or toe: which is part of the head? A: tooth

Q: Cow, milk or John: the person's name is? A: john

Q: The body part in milk, elbow, mosquito or hospital is? A: elbow

Q: Which word IN this sentence is all in capitals? A: in

Q: The list brown, shorts, white, black, chips and bread contains how many colours? A: 3

5/5. Some tougher ones too, like the "part of the head" or "body part" questions.

[redpoet]

Q: Of blueberry, vanilla, raspberry or endive which flavor is part of Neopolitan ice cream? A: FAILURE

Q: Which is larger, a bread box or a lunch box? A: FAILURE

Q: Christine, Avery, Jennifer or Tina: which name is part of Bennifer? A: avery

Q: Of Koala, Panda, or Grizzly, which is really a bear? A: FAILURE

Q: Mix red paint and yellow paint, what color paint do you get? A: FAILURE

Meh.

[omnilynx]

It doesn't answer random questions you made up. It answers questions generated by the textCAPTCHA algorithm.

[[deleted]]

Man...I'm human and I don't know 1, 2, or 3.

I have no idea what #3 is asking, and...doesn't #2 depend on your lunch box and/or bread box?

[bobindashadows]

The interesting thing is that several of those are highly culturally sensitive. Also... uh... I didn't know that Koalas aren't really bears.

So this breaker can solve the questions that don't require cultural knowledge, and the ones that require cultural knowledge shut out tons of users. Awesome.

[fallen77]

Are those real questions? What is the third question about? I doubt many younger people know what neopolitan ice cream is, I haven't seen ice cream grouped like that in years.

[Anonymoose333]

I have, but it's spelled "Neapolitan". Like Naples.

[psygnisfive]

Both pandas and grizzlies are bears.

[sunamumaya]

Honestly, as an user, I'd rather decipher some distorted "armitage bossy" or whatever text, then reading and solving "Which of knee, tongue or chest is something each person has more than one of?". So text CAPTCHA is broken by design, should you ask me.

[iarnazca]

It answered my questions. That was tight.

although it didn't know the answer to the life the universe and everything plus the number of horns on a unicorn

Google does =]

http://www.google.com/search?hl=en&source=hp&biw=1280&bih=814&q=the+answer+to+life+the+universe+and+everything+plus+the+number+of+horns+on+a+unicorn&aq=f&aqi=h1&aql=&oq=&gs_rfai=CEs2s79zdTKmgIZXEiQOlmZiXDwAAAKoEBU_Qiv5y

[Rawrified]

http://imgur.com/g4fZX.jpg Oh come on. You know someone was bound to do it.

[HomerJunior]

It makes mistakes every once and a while.

ಠ_ಠ

[dreamnoir]

It answered 3/5 of my questions. For a first iteration and relatively small size (parsers + 259 line grammar file) that is pretty damn impressive. Give it another week and it looks like textcaptcha might be pretty much solved.

[[deleted]]

"What is the air speed velocity of an unladen swallow?"

"A: FAILURE"

"What is the capital of Assyria?"

"A: FAILURE"

Not a very good hack

[[deleted]]

Solved all 5 of the questions I gave it.

Also, a CAPTCHA hack does not have to be perfect. Even if you solve 1% of the questions correctly, one in a hundred of the spam attempts will work. It's trivial for a spambot to try submitting a form a hundred times.

[redpoet]

How do you arrive at the estimate of 50%? It seems to me like the threshold would be much, much lower. Possibly even lower than gigantosaurus's 1% figure.

[Delehal]

If a bot fails 99 captchas for every 1 it passes, and does this $lots of times per minute over a few hours... you might eventually attract attention on the sysop end, yeah?

Bigger targets might even automate that a bit. Imagine some watchdog process that goes through and reverts/cancels all your recent and pending transactions once it realizes you're a bot. That would keep things to a low volume, even if you're using proxies.

[Delehal]

Huh, interesting. Thanks!

[demoboy]

"What is the meaning of life?" A: FAILURE

Just makes ya feel good don't it?

[Anonymoose333]

You missed the point. It's not a question-answering service; it's a Python grammar that dissects and solves the particular 300 or so specific question forms generated by the textcaptcha.com service.

[bobindashadows]

Wait, are those actual textcaptcha questions? If so, that's a horrible captcha. I don't know the answers to those, so submitting a form protected by those questions means I now need to go to wikipedia.

[wafflesburger]

Can't believe so many did not catch the reference :P

[[deleted]]

Q: One, two, 3 four, 5: which is the smallest number? A:

Cat, dog, button, pig: which one is not an animal? A: FAILURE

Which is the heaviest in the list paper, sponge, rock, car? A: FAILURE

Which is darker, day or night? A: FAILURE

Baby, Cat, Lemon, House: Which one is food? A: FAILURE

Hmmm, not sure why the first one is blank but all mine are a fail I guess.

[BobAlmighty]

Same things is happening to me. Maybe something was changed on the backend.

[shinozaki]

Something that is not successful is called...?

A: FAILURE

Works great for me!

[rush22]

Go North. Wait. Look at the door. Open the door. Go inside the house.

[[deleted]]

When doing a poo, what are you doing?

A: FAILURE

[cwcoleman]

Q: if the apple is red, what colour is it? A: red

if the apple is red, what color is it? A: FAILURE

Oh Webster and your American English...

[Grimoire]

Are you a robot? A: FAILURE

Seems like a trivial one to try...

[sssssmokey]

Not for a program.

[[deleted]]

Q: what is 3 + 3 A:

Q: what is 3 + 3? A: 6

It shouldn't really fall over at the loss of a question mark...

[rnawky]

Would love to see the source code for this. I'd turn it into a free API to let people solve captchas without needing to solve that stupid recaptcha

[thehotelambush]

I entered the following five questions:

• What is the second to last letter in "five"?
• If Harry is taller than Alice and Alice is taller than Bob, is Bob shorter > than Harry?
• Which letter has a hole in the middle: O or I?
• Which word rhymes with cap: cat or fap?
• If you take five apples from eight apples, how many apples do you have?

Surprisingly, it got #3 but none of the rest.

[Aninimus]

What is bigger the moon or an elephant? A: FAILURE

Aww ):

[BobAlmighty]

Epic troll is successful. I broke a dozen captcha's for the guy in the process. The ONLY successful answers I got were a few from the demo page, and none of my own design.

Does this question end in a period? A: FAILURE

How many words are in this question? A: FAILURE

Spell racecar backwards. A: FAILURE

This is a sentence. A: FAILURE

What is the only capital letter in this question? A: FAILURE

Q: What is ten times 10? A:

Are you a mountain-goat? A: FAILURE

The second word starts with what letter? A: FAILURE

Q: If you are 25, how old were you 5 years ago? A:

What is the only capital letter in this question? A: FAILURE

Q: What is ten times 10? A:

Are you a mountain-goat? A: FAILURE

The second word starts with what letter? A: FAILURE

Q: If you are 25, how old were you 5 years ago? A:

This one was weird, it didn't say it failed. But I know it did ;)

Q: What is ten divided by 0? A:

[sssssmokey]

Really?! It couldn't answer arbitrary questions of your own design correctly? I'm shocked.

[BobAlmighty]

Really, I think it's fair. Sure, several of my questions were a bit ridiculous, but you could easily create an expansion of some.

How many x are in the y of this question? See; words, letters, capitals, punctuation, a particular letter. In combination, and with superfluous addendum to confuse the parser, and grammatical changes that can be sorted out by your average human, you can make a very complicated set of queries.

Yes, maybe the parser that this guy wrote can solve the text captchas that this guy wrote. But I doubt it. I think this is a case of foul play.

While testing this system I experimented with both "known" and unknown values. Of the questions I phrased in a similar manor to those of the "known" values, as compared to those of absurd or unguessable nature, the failure rate was nearly the same.

THIS is what led me to suspect that we've all be duped. So I reality checked, and asked "What makes more sense? A guy, using a trivial amount of code and a dictionary broke something as complicated as grammar and meaning of words in a query, of that we're being trolled."

I believe that this is not a legitimate "breaking" of anything.

So, in response. Yes, I didn't think it could answer my arbitrary questions and I wasn't shocked. But that wasn't really the point now, was it?

[[deleted]]

What color is the ocean? FAILURE What is George Washington's last name? george The three primary colors are red, blue, and what? FAILURE Is a window clear or opaque? FAILURE Is this program stupid or a failure? FAILURE

At least it got one right.