CVE-2020-7955 Incorrect Authorization in HashiCorp Consul

What is CVE-2020-7955?

CVE-2020-7955 is a medium-severity missing authorization vulnerability in n/a, published on 31 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

HashiCorp Consul and Consul Enterprise 1.4.1 through 1.6.2 did not uniformly enforce ACLs across all API endpoints, resulting in potential unintended information disclosure. Fixed in 1.6.3.

Weakness: CWE-863

Which versions are affected by CVE-2020-7955?

4 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-2020-7955?

Upgrade github.com/hashicorp/consul to 1.6.3 or later.

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

Is CVE-2020-7955 being exploited?

There is no known exploitation of CVE-2020-7955 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-2020-7955, DEBIAN-CVE-2020-7955, GHSA-r9w6-rhh9-7v53, GO-2022-0874, UBUNTU-CVE-2020-7955.