Prototype Pollution in minimist
Affected versions of `minimist` are vulnerable to prototype pollution. Arguments are not properly sanitized, allowing an attacker to modify the prototype of `Object`, causing the addition or modification of an existing property that will exist on all objects. Parsing the argument `--__proto__.y=Polluted` adds a `y` property with value `Polluted` to all objects. The argument `--__proto__=Polluted` raises and uncaught error and crashes the application. This is exploitable if attackers have control over the arguments being passed to `minimist`. ## Recommendation Upgrade to versions 0.2.1, 1.2.3 or later.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-7598US | medium5.6 | Exploit | ||
minimist before 1.2.2 could be tricked into adding or modifying properties of Object.prototype using a "constructor" or "__proto__" payload. | ||||
references
External citations — patches, advisories, analysis.
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.htmlWEB
- https://github.com/minimistjs/minimist/commit/10bd4cdf49d9686d48214be9d579a9cdfda37c68WEB
- https://github.com/minimistjs/minimist/commit/38a4d1caead72ef99e824bb420a2528eec03d9abWEB
- https://github.com/minimistjs/minimist/commit/4cf1354839cb972e38496d35e12f806eea92c11f#diff-a1e0ee62c91705696ddb71aa30ad4f95WEB
- https://github.com/minimistjs/minimist/commit/63e7ed05aa4b1889ec2f3b196426db4500cbda94WEB
- https://github.com/substack/minimistPACKAGE
- https://nvd.nist.gov/vuln/detail/CVE-2020-7598ADVISORY
- https://snyk.io/vuln/SNYK-JS-MINIMIST-559764WEB
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