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Date: Thu, 27 Jun 2013 12:23:34 +0200
From: Arthur Gervais <arthur.gervais@inf.ethz.ch>
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Cc: Ghassan Karame <ghassan@karame.org>, Hubert Ritzdorf <rihubert@inf.ethz.ch>
Subject: [Bitcoin-development] Double-Spending Fast Payments in Bitcoin due
to Client versions 0.8.1
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Dear Bitcoin developers,
We would like to report a vulnerability which might lead, under some
assumptions, to a double-spending attack in a fast payment scenario.
The vulnerability has been introduced due to signature encoding
incompatibilities between versions 0.8.2 (or 0.8.3) and earlier
Bitcoin versions.
Please find at the following link a detailed description of this
vulnerability:
ftp://ftp.inf.ethz.ch/pub/publications/tech-reports/7xx/789.pdf
We contacted and informed Gavin earlier about this problem.
With best regards,
Arthur Gervais
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