CVE-2021-36213

HIGH7.5EPSS 0.77%

HashiCorp Consul L7 deny intention results in an allow action

Published: 7/19/2021Modified: 4/3/2025

Also known as:GHSA-8h2g-r292-j8xhBIT-consul-2021-36213CGA-w2w6-j65x-9wjwGO-2022-0895

Description

HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1.

Affected packages (3)

Bitnami/consul>= 1.9.0, < 1.9.8, >= 1.10.0, < 1.10.1
Go/github.com/hashicorp/consulfrom 0, < 1.10.1
Go/github.com/hashicorp/consulfrom 0, < 1.10.1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References (7)

ADVISORYhttps://github.com/advisories/GHSA-8h2g-r292-j8xh
ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-36213
WEBhttps://discuss.hashicorp.com/t/hcsec-2021-16-consul-s-application-aware-intentions-deny-action-fails-open-when-combined-with-default-deny-policy/26855
WEBhttps://github.com/hashicorp/consul
WEBhttps://github.com/hashicorp/consul/releases/tag/v1.10.1
WEBhttps://security.gentoo.org/glsa/202208-09
WEBhttps://www.hashicorp.com/blog/category/consul