CVE-2018-14085 Information

Description

An issue was discovered in a smart contract implementation for UserWallet 0x0a7bca9FB7AfF26c6ED8029BB6f0F5D291587c42 an Ethereum token. First suppose that the owner adds the evil contract address to his sweepers. The evil contract looks like this: contract Exploit uint public start; function sweep(address _token uint _amount) returns (bool) start = 0x123456789; return true; . Then when one calls the function sweep() in the UserWallet contract it will change the sweeperList to 0X123456789.

CVSS Vector

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

Reference

https://github.com/hellowuzekai/blockchains/blob/master/delegatecall.md

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