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Sender: Doug <mith@jrbobdobbs.org>
From: Doug Huff <dhuff@jrbobdobbs.org>
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Date: Mon, 27 Jun 2011 21:48:17 -0500
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To: Bitcoin Dev Development <bitcoin-development@lists.sourceforge.net>
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Subject: [Bitcoin-development] Fwd: Live mtgox.com trade matching bug.
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Begin forwarded message:
> From: Doug Huff <mith@jrbobdobbs.org>
> Date: June 27, 2011 9:46:13 PM CDT
> To: full-disclosure@lists.grok.org.uk, "Mt.Gox" <info@mtgox.com>
> Cc: Bitcoin Dev Development =
<bitcoin-development@lists.sourceforge.net>
> Subject: Live mtgox.com trade matching bug.
>=20
> Step 1: Have USD available for spending on mtgox.com.
> Step 2: Put in a buy order large enough to drain your account. Low =
enough under the current trading price that it will not execute =
immediately.
> Step 3: Withdraw all USD funds.
> Step 4: Wait for market to fall enough to meet your order.
> Step 5: ...(self explanatory)...
>=20
> There's a bit of luck in being able to take advantage, obviously.
>=20
> I would suggest you take the site down asap until this is corrected or =
publicly show how this order will never execute:
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> Welcome <username removed> 0.00000000 =E0=B8=BFTC 424.44901
> Buying 138468.901 0.01 Active 1384.69 06/26 15:27 cancel
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> I cannot guarantee this order will execute but from everything I've =
observed about the new trade matching code I have no reason to believe =
it will not.
>=20
> At the very least this could be used to influence market conditions if =
it is only a display bug.
>=20
> --=20
> Douglas Huff
>=20
>=20
--=20
Doug Huff
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