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7.5
CVE-2018-13740: OneChain token lets owner set any user balance
CVE-2018-13740 · published 8 years ago
Summary
The OneChain smart‑contract code that creates new tokens contains a calculation error that can be abused by the contract owner to assign any amount of tokens to any account. This could let the owner give themselves or others unlimited tokens, affecting the token’s value and trust. Review the contract code and apply the corrected version or disable the flawed function until it is fixed.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| onechain_project | onechain |
All versions
cpe:2.3:a:onechain_project:onechain:-:*:*:*:*:*:*:* |
Original advisory text
The mintToken function of a smart contract implementation for OneChain, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to a...
The mintToken function of a smart contract implementation for OneChain, 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.
References
- https://github.com/BlockChainsSecurity/EtherTokens/blob/master/GEMCHAIN/mint%20i... Exploit Third Party Advisory
- https://github.com/BlockChainsSecurity/EtherTokens/tree/master/OneChain Third Party Advisory
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker partial control (estimated)
Type
CWE-190Integer Overflow
Timeline
Published9 Jul 2018
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2018-13740 · NVD
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