Vulnerability in HashiCorp Consul (CVE-2021-32574)

Summary

Vulnerability in HashiCorp Consul (CVE-2021-32574). Data can be tampered with by attackers. Mitigation: upgrade to 1.8.14 or later.

Original description

The description as published by the source.

HashiCorp Consul and Consul Enterprise 1.3.0 through 1.10.0 Envoy proxy TLS configuration does not validate destination service identity in the encoded subject alternative name. Fixed in 1.8.14, 1.9.8, and 1.10.1.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2021-32574 has been found in HashiCorp Consul.
Data can be tampered with by attackers.
What to do: upgrade HashiCorp Consul to 1.8.14 or later.
If unsure, ask your IT team or search "HashiCorp Consul CVE-2021-32574" on the vendor's site.

CVE-2021-32574 (HashiCorp Consul)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1.8.14 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in HashiCorp Consul.

📍 Affected scope

Check the vendor advisory for the affected versions of HashiCorp Consul.

🔥 Severity

Severity: ?. Data can be tampered with by attackers.

🔧 How to fix

Update to 1.8.14.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
Audit SBOM/dependencies for affected components.
```
資産台帳・SBOM・依存マニフェストで HashiCorp Consul を使っているサービスとバージョンを洗い出す。
2
Apply patch patch
```
Upgrade HashiCorp Consul to 1.8.14
```
ステージング環境で 1.8.14 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2021-32574 consul

References

advisory discuss.hashicorp.com
advisory github.com
advisory security.gentoo.org
advisory hashicorp.com