CVE-2021-41803 HashiCorp Consul does not properly validate node or segment names prior to usage in JWT claim assertions

What is CVE-2021-41803?

CVE-2021-41803 is a high-severity missing authorization vulnerability in n/a, published on 23 Sep 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Weakness: CWE-862

Which versions are affected by CVE-2021-41803?

8 open source packages ship an affected version, including github.com/hashicorp/consul and consul. It affects 1 product.

Products include Hashicorp Consul.

How do I fix CVE-2021-41803?

Upgrade github.com/hashicorp/consul to a fixed version for your release line: 1.12.5, 1.13.2 or 1.11.9.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-41803 being exploited?

There is no known exploitation of CVE-2021-41803 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2021-41805 Privilege escalation in n/a High 8.8
• CVE-2021-37219 HashiCorp Consul Privilege Escalation Vulnerability High 8.8
• CVE-2023-2816 Consul Envoy Extension Downsteam Proxy Configuration By Upstream Service Owner High 8.7
• CVE-2024-10006 Consul L7 Intentions Vulnerable To Headers Bypass High 8.3
• CVE-2024-10005 Consul L7 Intentions Vulnerable To URL Path Bypass High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-consul-2021-41803, DEBIAN-CVE-2021-41803, GHSA-hr3v-8cp3-68rf, GO-2024-2683, UBUNTU-CVE-2021-41803.