CVE-2023-1299: Github.com/hashicorp/nomad Nomad Job Submitter Privilege Escalation Vulnerability

HIGH
Advisory Identifier: GHSA-rqm8-q8j9-662f
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CVSS 8.8
Published
Advisory Summary

CVE-2023-1299 is a HIGH (CVSS 8.8) nomad job submitter privilege escalation vulnerability (General Security Weakness) affecting Github.com/hashicorp/nomad libraries in the Go ecosystem. The issue involves nomad job submitter privilege escalation using workload identity. Remediation is available by upgrading affected packages to version 1.5.1.

CVE-2023-1299 at a Glance

CVE Identifier CVE-2023-1299
GHSA Identifier GHSA-rqm8-q8j9-662f
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification General Security Weakness
Affected Product Github.com/hashicorp/nomad
Package Ecosystem Go
Published Date
Last Updated

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).

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 High (I:H)
Availability High (A:H)

How to Fix CVE-2023-1299

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: 1.5.1 
Upgrade github.com/hashicorp/nomad to 1.5.1
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-2023-1299, 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 1.5.1), 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 General Security Weakness. 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

### Summary A vulnerability was identified in Nomad and Nomad Enterprise (“Nomad”) such that a user with the submit-job ACL capability can submit a job that can escalate to management-level privileges. This vulnerability, CVE-2023-1299, was introduced in Nomad 1.5.0 and fixed in Nomad 1.5.1. ### Background Nomad 1.4.0 introduced the concept of workload identity so that tasks can access variables without needing to access them through Nomad HTTP API with an ACL token. In 1.5.0, the identity block was introduced, which exposes the workload identity token to the workload so it can access Nomad HTTP API via a unix domain socket without configuring mTLS. ### Details During internal testing, we discovered it was possible to abuse the workload identity to elevate to management-level privilege if the workload identity did not have any attached ACL policies. ### Remediation Customers should evaluate the risk associated with this issue and consider upgrading to Nomad 1.5.1 or newer. See Nomad’s Upgrading for general guidance on this process.

CVE-2023-1299 Affected Github.com/hashicorp/nomad Versions

1 component(s)
Fixed Versions:
1.5.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/nomad
golang/github.com/hashicorp/nomad
Go
≥ 1.5.0
< 1.5.1
All 1 versions
1.5.0
1.5.1

References

NVD — CVE-2023-1299 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-1299
Github.com/hashicorp/nomad Source Repository REPOSITORY
https://github.com/hashicorp/nomad
discuss.hashicorp.com/t/hcsec-2023-08-nom... WEB
https://discuss.hashicorp.com/t/hcsec-2023-08-nomad-job-submitter-privilege-escalation-using-workload-identity/51389

Frequently Asked Questions

What is CVE-2023-1299?
CVE-2023-1299 is a security vulnerability in Github.com/hashicorp/nomad involving Nomad Job Submitter Privilege Escalation Using Workload Identity under General Security Weakness.
Which Github.com/hashicorp/nomad versions are affected?
Affected versions include releases prior to 1.5.1 across affected packages: github.com/hashicorp/nomad.
What version fixes CVE-2023-1299?
Upgrading to 1.5.1 (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 1.5.1. Upgrade your dependency to 1.5.1 or later.
What is the CVSS score of CVE-2023-1299?
CVE-2023-1299 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-1299?
CVE-2023-1299 is classified under General Security Weakness.
How can I check Go dependencies for CVE-2023-1299?
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-rqm8-q8j9-662f",
  "modified" : "2023-03-17T16:59:18Z",
  "published" : "2023-03-14T15:30:17Z",
  "aliases" : [ "CVE-2023-1299" ],
  "summary" : "Nomad Job Submitter Privilege Escalation Using Workload Identity",
  "details" : "### Summary\nA vulnerability was identified in Nomad and Nomad Enterprise (“Nomad”) such that a user with the submit-job ACL capability can submit a job that can escalate to management-level privileges. This vulnerability, CVE-2023-1299, was introduced in Nomad 1.5.0 and fixed in Nomad 1.5.1.\n\n### Background\nNomad 1.4.0 introduced the concept of workload identity so that tasks can access variables without needing to access them through Nomad HTTP API with an ACL token.\n\nIn 1.5.0, the identity block was introduced, which exposes the workload identity token to the workload so it can access Nomad HTTP API via a unix domain socket without configuring mTLS.\n\n### Details\nDuring internal testing, we discovered it was possible to abuse the workload identity to elevate to management-level privilege if the workload identity did not have any attached ACL policies.\n\n### Remediation\nCustomers should evaluate the risk associated with this issue and consider upgrading to Nomad 1.5.1 or newer. See Nomad’s Upgrading for general guidance on this process.",
  "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" : "1.5.0"
      }, {
        "fixed" : "1.5.1"
      } ]
    } ],
    "versions" : [ "1.5.0" ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-1299"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/hcsec-2023-08-nomad-job-submitter-privilege-escalation-using-workload-identity/51389"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/hashicorp/nomad"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-14T18:02:16Z",
    "nvd_published_at" : "2023-03-14T15:15:00Z"
  }
}