CVE-2021-37218 Privilege escalation in Hashicorp Nomad

What is CVE-2021-37218?

CVE-2021-37218 is a high-severity 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 Nomad and Nomad Enterprise Raft RPC layer allows non-server agents with a valid certificate signed by the same CA to access server-only functionality, enabling privilege escalation. Fixed in 1.0.10 and 1.1.4.

Weakness: CWE-295

Which versions are affected by CVE-2021-37218?

5 open source packages ship an affected version, including github.com/hashicorp/nomad. It affects 1 product.

Products include Hashicorp Nomad.

How do I fix CVE-2021-37218?

Upgrade github.com/hashicorp/nomad to a fixed version for your release line: 1.0.10 or 1.1.4.

Is CVE-2021-37218 being exploited?

There is no known exploitation of CVE-2021-37218 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2023-1782 Nomad Unauthenticated Client Agent HTTP Request Privilege Escalation Critical 10.0
• CVE-2022-30324 Privilege escalation in Hashicorp Nomad Critical 9.8
• CVE-2020-7956 Improper Certificate Validation in HashiCorp Nomad Critical 9.8
• CVE-2019-12618 Hashicorp Nomad Access Control Issues Critical 9.8
• CVE-2020-27195 Use After Free in HashiCorp Nomad Critical 9.1

Sources

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

Also known as GHSA-c8x3-rg72-fwwg, GO-2022-0591, UBUNTU-CVE-2021-37218.