CVE-2021-36213 HashiCorp Consul L7 deny intention results in an allow action
HashiCorp Consul fails open on specific L7 deny policies, allowing unauthorized L4 traffic bypassing intended security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-36213?
CVE-2021-36213 is a high-severity vulnerability in n/a, published on 17 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2021-36213?
4 open source packages ship an affected version, including github.com/hashicorp/consul and consul. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/hashicorp/consul Go | All versions | 1.10.1 |
github.com/hashicorp/consul Go | All versions | 1.10.1 |
github.com/hashicorp/consul Go | All versions | 1.10.1 |
consul Bitnami | From 1.9.0 | 1.9.8, 1.10.1 |
Products include Hashicorp Consul.
How do I fix CVE-2021-36213?
Upgrade github.com/hashicorp/consul to 1.10.1 or later.
Is CVE-2021-36213 being exploited?
There is no known exploitation of CVE-2021-36213 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2021-41805 Privilege escalation in n/a
- CVE-2021-37219 HashiCorp Consul Privilege Escalation Vulnerability
- CVE-2023-2816 Consul Envoy Extension Downsteam Proxy Configuration By Upstream Service Owner
- CVE-2024-10006 Consul L7 Intentions Vulnerable To Headers Bypass
- CVE-2024-10005 Consul L7 Intentions Vulnerable To URL Path Bypass
Sources
Also known as BIT-consul-2021-36213, GHSA-8h2g-r292-j8xh, GO-2022-0895, UBUNTU-CVE-2021-36213.