Vulnerabilities > CVE-2018-18665 - Integer Overflow or Wraparound vulnerability in Nexxuscoin Nexxustoken
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
HIGH Availability impact
NONE Summary
The mintToken function of Nexxus (NXX) aka NexxusToken, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Forced Integer Overflow This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
References
- https://etherscan.io/address/0x7627de4b93263a6a7570b8dafa64bae812e5c394#code
- https://etherscan.io/address/0x7627de4b93263a6a7570b8dafa64bae812e5c394#code
- https://github.com/n0pn0pn0p/smart_contract_-vulnerability/blob/master/PolyAi.md
- https://github.com/n0pn0pn0p/smart_contract_-vulnerability/blob/master/PolyAi.md
- https://github.com/NexxusUniversity/nexxuscoin/issues/2
- https://github.com/NexxusUniversity/nexxuscoin/issues/2