CVE-2018-13518
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe mintToken function of a smart contract implementation for TCash, 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe mintToken function in the TCash Ethereum smart contract contains an integer overflow vulnerability that allows the contract owner to manipulate token balances of arbitrary users. This occurs when arithmetic operations exceed the maximum value a uint256 can store, causing the balance to wrap to a small or unexpected value, effectively allowing arbitrary balance setting.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify TCash contract deploymentSearch the Ethereum blockchain for contracts named 'TCash' or 'Tcash' or with the token symbol 'TCASH'. Obtain the contract address if deployed.Affected if A TCash contract is deployed in the environment
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Check for mintToken function existenceReview the contract source code or use a blockchain explorer to examine the contract's function interface. Look for a function named 'mintToken' that accepts a user address and token amount as parameters.Affected if The mintToken function exists in the deployed contract
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Verify SafeMath is not usedExamine the contract source code for SafeMath library import and usage. Look for 'using SafeMath for uint256' statements and '.add()', '.sub()', '.mul()' method calls on uint256 types.Affected if SafeMath library is not imported or used, and standard arithmetic operators (+, -, *) are used instead
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Confirm owner-only access to mintTokenReview the mintToken function visibility modifier. Check if the function has 'onlyOwner' or equivalent access control that restricts调用 to the contract deployer/owner.Affected if The mintToken function is accessible to the contract owner without additional safeguards
If a TCash contract with a mintToken function using unprotected arithmetic is deployed, the environment is affected by this integer overflow vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataReplace standard arithmetic operations with SafeMath library functions or migrate to Solidity 0.8+ which includes built-in overflow checks. Conduct a full security audit of the contract to identify any other arithmetic vulnerabilities.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2018-13518 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-13518 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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