CVE-2020-28348: Github.com/hashicorp/nomad Path Traversal Vulnerability

MODERATE
Advisory Identifier: GHSA-5x92-p4p5-33c4
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CVSS 6.5
CWE-22
Published
Advisory Summary

CVE-2020-28348 is a MODERATE (CVSS 6.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Github.com/hashicorp/nomad libraries in the Go ecosystem. The issue involves path traversal in hashicorp nomad. Remediation is available by upgrading affected packages to version 0.10.8, 0.11.7, 0.12.8.

CVE-2020-28348 at a Glance

CVE Identifier CVE-2020-28348
GHSA Identifier GHSA-5x92-p4p5-33c4
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

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

How to Fix CVE-2020-28348

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: 0.10.8 
Upgrade github.com/hashicorp/nomad to 0.10.8
github.com/hashicorp/nomad fixed: 0.11.7 
Upgrade github.com/hashicorp/nomad to 0.11.7
github.com/hashicorp/nomad fixed: 0.12.8 
Upgrade github.com/hashicorp/nomad to 0.12.8
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-2020-28348, 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 0.10.8), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. 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 0.9.0 up to 0.12.7 client Docker file sandbox feature (github.com/hashicorp/nomad/drivers/docker) may be subverted when not explicitly disabled or when using a volume mount type. Fixed in 0.12.8, 0.11.7, and 0.10.8.

CVE-2020-28348 Affected Github.com/hashicorp/nomad Versions

3 component(s)
Fixed Versions:
0.10.80.11.70.12.8
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/nomad
golang/github.com/hashicorp/nomad
Go
≥ 0.9.0
< 0.10.8
0.10.8
github.com/hashicorp/nomad
golang/github.com/hashicorp/nomad
Go
≥ 0.11.0-beta1
< 0.11.7
0.11.7
github.com/hashicorp/nomad
golang/github.com/hashicorp/nomad
Go
≥ 0.12.0-beta1
< 0.12.8
0.12.8

References

NVD — CVE-2020-28348 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28348
Github.com/hashicorp/nomad Source Repository REPOSITORY
https://github.com/hashicorp/nomad/issues/9303
Github.com/hashicorp/nomad Source Repository REPOSITORY
https://github.com/hashicorp/nomad/pull/9321
discuss.hashicorp.com/t/nomad-0-12-8-0-11... WEB
https://discuss.hashicorp.com/t/nomad-0-12-8-0-11-7-and-0-10-8-released/17491
Github.com/hashicorp/nomad Source Repository REPOSITORY
https://github.com/hashicorp/nomad/blob/master/CHANGELOG.md#0128-november-10-2020

Frequently Asked Questions

What is CVE-2020-28348?
CVE-2020-28348 is a security vulnerability in Github.com/hashicorp/nomad involving Path Traversal in HashiCorp Nomad under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Github.com/hashicorp/nomad versions are affected?
Affected versions include releases prior to 0.10.8, 0.11.7, 0.12.8 across affected packages: github.com/hashicorp/nomad.
What version fixes CVE-2020-28348?
Upgrading to 0.10.8, 0.11.7, 0.12.8 (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 0.10.8, 0.11.7, 0.12.8. Upgrade your dependency to 0.10.8, 0.11.7, 0.12.8 or later.
What is the CVSS score of CVE-2020-28348?
CVE-2020-28348 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2020-28348?
CVE-2020-28348 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Go dependencies for CVE-2020-28348?
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-5x92-p4p5-33c4",
  "modified" : "2023-10-02T13:44:47Z",
  "published" : "2022-02-15T01:57:18Z",
  "aliases" : [ "CVE-2020-28348" ],
  "summary" : "Path Traversal in HashiCorp Nomad",
  "details" : "HashiCorp Nomad and Nomad Enterprise 0.9.0 up to 0.12.7 client Docker file sandbox feature (github.com/hashicorp/nomad/drivers/docker) may be subverted when not explicitly disabled or when using a volume mount type. Fixed in 0.12.8, 0.11.7, and 0.10.8.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/nomad"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.9.0"
      }, {
        "fixed" : "0.10.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/nomad"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.11.0-beta1"
      }, {
        "fixed" : "0.11.7"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/nomad"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.12.0-beta1"
      }, {
        "fixed" : "0.12.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-28348"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/nomad/issues/9303"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/nomad/pull/9321"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/nomad-0-12-8-0-11-7-and-0-10-8-released/17491"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/nomad/blob/master/CHANGELOG.md#0128-november-10-2020"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-12T21:53:03Z",
    "nvd_published_at" : null
  }
}