CVE-2021-37218: Github.com/hashicorp/nomad Privilege Escalation Vulnerability
HIGHCVE-2021-37218 is a HIGH (CVSS 8.8) privilege escalation vulnerability (CWE-295: Improper Certificate Validation) affecting Github.com/hashicorp/nomad libraries in the Go ecosystem. The issue involves privilege escalation in hashicorp nomad. Remediation is available by upgrading affected packages to version 1.0.10, 1.1.4.
CVE-2021-37218 at a Glance
Security Impact
CVSS: 8.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2021-37218
To remediate this vulnerability, upgrade all affected Github.com/hashicorp/nomad dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/hashicorp/nomad to 1.0.10Upgrade github.com/hashicorp/nomad to 1.1.4Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/hashicorp/nomadHow to Check if You Are Affected
To determine whether your application is affected by CVE-2021-37218, inspect your project dependencies for Github.com/hashicorp/nomad:
inspect dependencies for github.com/hashicorp/nomadAnalyze the terminal output to locate any version of Github.com/hashicorp/nomad in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.10), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Github.com/hashicorp/nomad, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-37218 Affected Github.com/hashicorp/nomad Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/hashicorp/nomad
|
Go |
< 1.0.10
|
1.0.10
|
|
github.com/hashicorp/nomad
|
Go |
≥ 1.1.0
< 1.1.4
|
1.1.4
|
References
Frequently Asked Questions
What is CVE-2021-37218?
Which Github.com/hashicorp/nomad versions are affected?
What version fixes CVE-2021-37218?
Is github.com/hashicorp/nomad affected?
What is the CVSS score of CVE-2021-37218?
What CWE is associated with CVE-2021-37218?
How can I check Go dependencies for CVE-2021-37218?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-c8x3-rg72-fwwg",
"modified" : "2021-09-14T18:46:53Z",
"published" : "2021-09-08T20:14:38Z",
"aliases" : [ "CVE-2021-37218" ],
"summary" : "Privilege escalation in Hashicorp Nomad",
"details" : "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.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/hashicorp/nomad"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.0.10"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/hashicorp/nomad"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.1.0"
}, {
"fixed" : "1.1.4"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-37218"
}, {
"type" : "WEB",
"url" : "https://discuss.hashicorp.com/t/hcsec-2021-21-nomad-raft-rpc-privilege-escalation/29023"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/hashicorp/nomad"
}, {
"type" : "WEB",
"url" : "https://www.hashicorp.com/blog/category/nomad"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-295" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2021-09-08T18:12:37Z",
"nvd_published_at" : "2021-09-07T12:15:00Z"
}
}