CVE-2021-32575: Github.com/hashicorp/nomad Improper Network Isolation Vulnerability

MODERATE
Advisory Identifier: GHSA-vf6q-9f2f-mwhv
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CVSS 6.5
CWE-1100
Published
Advisory Summary

CVE-2021-32575 is a MODERATE (CVSS 6.5) improper network isolation vulnerability (CWE-1100: Insufficient Isolation of System-Dependent Functions) affecting Github.com/hashicorp/nomad libraries in the Go ecosystem. The issue involves improper network isolation in hashicorp nomad. Remediation is available by upgrading affected packages to version 1.0.5, 0.12.12.

CVE-2021-32575 at a Glance

CVE Identifier CVE-2021-32575
GHSA Identifier GHSA-vf6q-9f2f-mwhv
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-1100: Insufficient Isolation of System-Dependent Functions
Affected Product Github.com/hashicorp/nomad
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2021-32575

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.

github.com/hashicorp/nomad fixed: 1.0.5 
Upgrade github.com/hashicorp/nomad to 1.0.5
github.com/hashicorp/nomad fixed: 0.12.12 
Upgrade github.com/hashicorp/nomad to 0.12.12
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/hashicorp/nomad

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-32575, inspect your project dependencies for Github.com/hashicorp/nomad:

inspect dependencies for github.com/hashicorp/nomad

Analyze 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 1.0.5), 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-1100: Insufficient Isolation of System-Dependent Functions, where the product or code does not isolate system-dependent functionality into separate standalone modules. 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

HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.

CVE-2021-32575 Affected Github.com/hashicorp/nomad Versions

2 component(s)
Fixed Versions:
1.0.50.12.12
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/nomad
golang/github.com/hashicorp/nomad
Go
≥ 1.0.0
< 1.0.5
1.0.5
github.com/hashicorp/nomad
golang/github.com/hashicorp/nomad
Go
< 0.12.12
0.12.12

References

NVD — CVE-2021-32575 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32575
discuss.hashicorp.com/t/hcsec-2021-14-nom... WEB
https://discuss.hashicorp.com/t/hcsec-2021-14-nomad-bridge-networking-mode-allows-arp-spoofing-from-other-bridged-tasks-on-same-node/24296
www.hashicorp.com/blog/category/nomad WEB
https://www.hashicorp.com/blog/category/nomad

Frequently Asked Questions

What is CVE-2021-32575?
CVE-2021-32575 is a security vulnerability in Github.com/hashicorp/nomad involving Improper network isolation in Hashicorp Nomad under CWE-1100: Insufficient Isolation of System-Dependent Functions.
Which Github.com/hashicorp/nomad versions are affected?
Affected versions include releases prior to 1.0.5, 0.12.12 across affected packages: github.com/hashicorp/nomad.
What version fixes CVE-2021-32575?
Upgrading to 1.0.5, 0.12.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/hashicorp/nomad affected?
Yes, github.com/hashicorp/nomad is affected in releases prior to 1.0.5, 0.12.12. Upgrade your dependency to 1.0.5, 0.12.12 or later.
What is the CVSS score of CVE-2021-32575?
CVE-2021-32575 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2021-32575?
CVE-2021-32575 is classified under CWE-1100: Insufficient Isolation of System-Dependent Functions (The product or code does not isolate system-dependent functionality into separate standalone modules.).
How can I check Go dependencies for CVE-2021-32575?
Run the dependency tree command: 'inspect dependencies for github.com/hashicorp/nomad'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vf6q-9f2f-mwhv",
  "modified" : "2021-06-23T18:01:24Z",
  "published" : "2021-06-24T20:28:21Z",
  "aliases" : [ "CVE-2021-32575" ],
  "summary" : "Improper network isolation in Hashicorp Nomad",
  "details" : "HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/nomad"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0"
      }, {
        "fixed" : "1.0.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/nomad"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.12.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-32575"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/hcsec-2021-14-nomad-bridge-networking-mode-allows-arp-spoofing-from-other-bridged-tasks-on-same-node/24296"
  }, {
    "type" : "WEB",
    "url" : "https://www.hashicorp.com/blog/category/nomad"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1100" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-06-18T18:39:21Z",
    "nvd_published_at" : "2021-06-17T19:15:00Z"
  }
}