CVE-2020-25201 Denial of service in HashiCorp Consul

What is CVE-2020-25201?

CVE-2020-25201 is a high-severity denial of service vulnerability in n/a, published on 4 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

HashiCorp Consul Enterprise version 1.7.0 up to 1.8.4 includes a namespace replication bug which can be triggered to cause denial of service via infinite Raft writes. Fixed in 1.7.9 and 1.8.5.

Which versions are affected by CVE-2020-25201?

6 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-2020-25201?

Upgrade github.com/hashicorp/consul to a fixed version for your release line: 1.7.9 or 1.8.5.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-25201 being exploited?

There is no known exploitation of CVE-2020-25201 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-2020-25201, DEBIAN-CVE-2020-25201, GHSA-496g-fr33-whrf, GO-2024-2501, UBUNTU-CVE-2020-25201.