Coinbase Bug to Provide Unlimited Ethereum

The bug was found by VI Company in December last year
21 March 2018   1294

VI Company reported the discovery of a vulnerability in the system of smart contracts of the Coinbase exchange, which allowed users to credit an unlimited amount of ETH to their accounts. Experts informed the company about the vulnerability in December last year, and in January it was eliminated. For their work, VI Company employees received an award of $ 10,000. This is reported by The Next Web.

By using a smart contract to distribute ether over a set of wallets you can manipulate the account balance of your Coinbase account. If 1 of the internal transactions in the smart contract fails all transactions before that will be reversed. But on Coinbase these transactions will not be reversed, meaning someone could add as much ether to their balance as they want. When you look up the Coinbase wallet address after this transaction you will see that it is empty, but checking your Coinbase wallet will show your funds.
 

VI Company Report

In practice, this means that Coinbase users were able to enroll any amount of Ethereum on their accounts.

Researchers provided screenshots showing how Ethereum was credited to their account using the cancellation of the transaction.

Coinbase Bug
Coinbase Bug

Steps to reproduce, provided by the researchers :

  • Setup a smart contract with a few valid Coinbase wallets and 1 final faulty wallet (always throw exception when receiving funds smart contract for example)
  • Transfer appropriate funds to smart contract.
  • Execute smart contract adding the set amount of ether to the Coinbase wallets without ever actually leaving the smart contract wallet because the complete transaction fails at the last wallet.
  • Repeat until you have more than enough ethereum in your Coinbase wallet.
  • Cash out, transfer to off site wallet.

Whether any of the users could detect and take advantage of this vulnerability for their own enrichment is unknown.

Crypto M&A Deals to Set Record in 2018

Last year’s largest transactions were the acquisition of Poloniex for $ 400 million by the Circle; 2018 M&As totaled for $559M
14 February 2019   116

According to Forbes, in 2018 in the cryptoindustry there were mergers and acquisitions (M & A) totaling $ 559 million.

Last year’s largest transactions were the acquisition of Poloniex for $ 400 million by the Circle, as well as the Coinbase purchase of the Earn project for $ 120 million. In addition, the largest cryptocurrency company in the United States acquired the Blockseer analytical service for $ 14.8 million and paid $ 14.7 million Node40, specializing on accounting and tax blockchain solutions.

A total of 54 mergers and acquisitions took place in the crypto industry in 2018. This is 170% more than the year before (in 2017, 20 M&A transactions were closed). According to the Pitchbook, for the entire existence of the cryptocurrency sphere, the total amount of M&A transactions exceeded $ 1.1 billion. Thus, most of them occurred last year.

Kraken recently acquired the Crypto Facilities, a UK cryptoderivatives platform.