Monero Team to Kill Coin Burning Bug

A scenario of a hypothetical attack described by one of the participants of Monero's subreddit helped to identify the bug
26 September 2018   1217

Developers of the Monero cryptocurrency have eliminated a bug that could allow intruders to "burn" funds in organizations' wallets, while sacrificing only a small amount in the form of transaction commissions. This is reported in the official announcement of the project.

A scenario of a hypothetical attack described by one of the participants of Monero's subreddit allowed to identify the bug.

Practically speaking this bug is exploited as follows. An attacker first generates a random private transaction key. Thereafter, they modify the code to merely use this particular private transaction key, which ensures multiple transactions to the same public address (e.g. an exchange's hot wallet) are sent to the same stealth address. Subsequently, they send, say, a thousand transactions of 1 XMR to an exchange. Because the exchange's wallet does not warn for this particular abnormality (i.e. funds being received on the same stealth address), the exchange will, as usual, credit the attacker with 1000 XMR. The attacker then sells his XMR for BTC and lastly withdraws this BTC. The result of the hacker's action(s) is that the exchange is left with 999 unspendable / burnt outputs of 1 XMR.
 

dEBRUYNE at Get Monero

Monero developers note that this method does not allow the attack organizer to directly receive the XMR coins deposited in this way. However, an attacker can withdraw XMR through bitcoins, and the exchange will remain with 999 non-consumable or "burned" outputs from 1 XMR.

The created fix was privately distributed to exchanges and large merchants, in order not to attract unnecessary attention to the time of elimination of problems. According to the developers, the exploit was not used to perform real attacks.

In early August, because of the critical bug in the code of Monero, which allows to manipulate the amount of transactions, Livecoin suffered losses exceeding $ 1.8 million.

OKEx Korea to Delist Anonymous Coins Due to FATF

Monero, ZCash, DASH, Horizen and Super Bitcoin won't be supported starting from 10th of October
16 September 2019   305

The Korean division of the OKEx cryptocurrency exchange has announced the delisting of five anonymous coins, as they violate FATF standards.

On October 10, the site will stop supporting Monero, ZCash, DASH, Horizen and Super Bitcoin.

Recall that the FATF obliged the bitcoin exchange and other cryptocurrency service providers (VASPs) to follow AML and CFT procedures similar to traditional financial companies.

VASPs must exchange the personal data of participants in transactions and information about the balance of their wallets.

OKEx Korea emphasized that anonymous cryptocurrencies will not allow the exchange to comply with these rules.