Transaction malleability 2017 - page 2.

piotr_n

legendary

Activity: 2053

Merit: 1356

aka tonikt

Quote from: bitaps on March 12, 2017, 12:54:00 PM

Quote from: piotr_n on March 12, 2017, 08:43:16 AM

How is it an attack?
Who is it attacking and what for?

Here is official News about it

https://news.bitcoin.com/bither-ceo-bitclub-performing-segwit-related-attack-network/

How does it answer any of my questions?

Please explain why it is called "attack".

Using such a word implies that there was an aggressor and a victim.
So who was the victim and how was it hurt?

bitaps

member

Activity: 148

Merit: 45

https://bitaps.com/

Quote from: piotr_n on March 12, 2017, 08:43:16 AM

How is it an attack?
Who is it attacking and what for?

Here is official News about it

https://news.bitcoin.com/bither-ceo-bitclub-performing-segwit-related-attack-network/

piotr_n

legendary

Activity: 2053

Merit: 1356

aka tonikt

How is it an attack?
Who is it attacking and what for?

johoe

full member

Activity: 217

Merit: 259

BIP-62 was withdrawn. You may be confusing it with BIP-66, which didn't have low-S requirement. There is also a relay policy for low-S but not a soft fork. BIP-146 may fix it some day.

There are several discussions on reddit on r/btc. I think BitClub mined three blocks with high-S and BitmainWarrenty (not to be confused with Bitmain) was also involved. It also temporarily broke blockchain.info.

achow101

staff

Activity: 3458

Merit: 6793

Just writing some code

Who malleated those transactions?

I know that those who have chains of unconfirmed transactions that were based off of the original non-malleated ones were, but how many transactions is that? Who else was affected by these transactions?

bitaps

member

Activity: 148

Merit: 45

https://bitaps.com/

Today about 15 hours ago, was transaction malleability attack to bitcoin network. BIP 62 was accepted in 2014 but in 2017 miner BitClub mine transactions with negative S value in signature! Shocked

So BitClub gave the opportunity to this attack get success

We have bitcoin node with ability to save all events on bitcoin network.

Statistics on our bitcoin node:
Total affected Transaction: 84335
Success: 1405

Code:

9ab1d8ede94b8997c526680c197ed6cf1d2004845f1a409645c36c52d5c3fefa
  >>> 00070d799ae941cd60fc686802afba8609f637687df8714c9b29c03600a7559b block 456545 miner BitClub
6f1f6740eb0eaa7db013461f497e4fdc39594ab506c70708ed6969c25e9cbae0
  >>> f889938e3878a9836caa558c926bc2b05353cf29eb7f8ebbdffe0a5af80af5a4 block 456545 miner BitClub
924e59a5d70f2e8928a1dfdd01cab476caebf5773b001d06ad87d4619ff8674e
  >>> 785b2856106170b5ef462b35deae83879bb9e3fd282b3e5face8fe0d9ec17285 block 456545 miner BitClub
00fba70e71336d78c52cda58c252a836d1d860c69e54840fb85f6f9e947eef75
  >>> 2000e4a79fb534563f361a5a3f031c3db2d87a886b072b6ba68587ebbebc6198 block 456545 miner BitClub
71bad5a7eb5693e1787572c62ce3fe81be57907c9a67e5b67df32615b6fcc564
  >>> 783a6b069abb42818ef942832b8aad689c52c9e054572a8e5c5f402b41b1d35e block 456545 miner BitClub
5ad4bd91dc3b1588a5dd3fc880109400a467316114b64c093ba2624e6d9bfa28
  >>> 5e60913b376ce04a526dfd26ec60b5c0e86e5cbf61b0cc77ad170b35240dd313 block 456545 miner BitClub
c3d73f073d9efb1e6b5f83de13415e8f76763a1526c58283ec887a0f6b54a987
  >>> 9f4fd7345061fc567eca2807aa7f655696a0fcd0b4c039e597978ec935a8c4c4 block 456545 miner BitClub
bc256939a84a8a7d25e1e3f79b9cdc61f8f84cb1746371b6e75076f548bca6b1
  >>> ab1f20f7785137012de35e81709b2172c0d56af4949e53bfed9ddea9ddfb9527 block 456545 miner BitClub
304210e71da43a2f64410568b0473a1652da245e15eaccf42526636ced50be10
  >>> 04916551d68114586f22f6fe5e9cc73497f6b91fd440c764301437fc069afe69 block 456545 miner BitClub

Full list of successfully attacked transactions http://pastebin.com/KGYpqPta

Topic: Transaction malleability 2017 - page 2. (Read 1627 times)