CVE-2021-38698 HashiCorp Consul and Consul Enterprise 1.10.1 Txn.Apply endpoint allowed services to register proxies for other services, enabling access to service traffic.

What is CVE-2021-38698?

CVE-2021-38698 is a medium-severity missing authorization vulnerability in n/a, published on 7 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

HashiCorp Consul and Consul Enterprise 1.10.1 Txn.Apply endpoint allowed services to register proxies for other services, enabling access to service traffic. Fixed in 1.8.15, 1.9.9 and 1.10.2.

Weakness: CWE-862

Which versions are affected by CVE-2021-38698?

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-2021-38698?

Upgrade github.com/hashicorp/consul to a fixed version for your release line: 1.8.15, 1.9.9 or 1.10.2.

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

Is CVE-2021-38698 being exploited?

There is no known exploitation of CVE-2021-38698 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-2021-38698, DEBIAN-CVE-2021-38698, GHSA-6hw5-6gcx-phmw, GO-2022-0559, UBUNTU-CVE-2021-38698.