Integer overflow in CryptoBotsBattle Ethereum token

1) Integer overflow

EUVDB-ID: #VU18012

Risk: Medium

CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-17882

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in the batchTransfer() function of a smart contract implementation for CryptoBotsBattle (CBTB). A remote attacker can create an arbitrary amount of tokens for any user.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

CryptoBotsBattle: 0.4.19

CPE2.3

• cpe:2.3:a:cryptobotsbattle:cbtb:0.4.19:*:*:*:*:*:*:

External links

http://etherscan.io/address/0x4daa9dc438a77bd59e8a43c6d46cbfe84cd04255#code
http://github.com/GreenFoxy/Smart-contract-Vulnerabilities/blob/master/BattleToken.md

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.