CVE-2018-10299 Information

Description

An integer overflow in the batchTransfer function of a smart contract implementation for Beauty Ecosystem Coin (BEC) the Ethereum ERC20 token used in the Beauty Chain economic system allows attackers to accomplish an unauthorized increase of digital assets by providing two _receivers arguments in conjunction with a large _value argument as exploited in the wild in April 2018 aka the \batchOverflow\ issue.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://dasp.co/item-3 https://medium.com/secbit-media/a-disastrous-vulnerability-found-in-smart-contracts-of-beautychain-bec-dbf24ddbc30e https://peckshield.com/2018/04/22/batchOverflow/ https://support.okex.com/hc/en-us/articles/360002944212-BeautyChain-BEC-Withdrawal-and-Trading-Suspended https://twitter.com/OKEx_/status/987967343983714304 https://www.reddit.com/r/ethereum/comments/8esyg9/okex_erc20_bug/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5