CVE-2023-2816: Github.com/hashicorp/consul Write Permissions To Patch Remote Vulnerability

HIGH
Advisory Identifier: GHSA-rqjq-ww83-wv5c
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CVSS 8.7
CWE-266
Published
Advisory Summary

CVE-2023-2816 is a HIGH (CVSS 8.7) write permissions to patch remote vulnerability (CWE-266: Incorrect Privilege Assignment) affecting Github.com/hashicorp/consul libraries in the Go ecosystem. The issue involves write permissions to patch remote proxy instances. Remediation is available by upgrading affected packages to version 1.15.3.

CVE-2023-2816 at a Glance

CVE Identifier CVE-2023-2816
GHSA Identifier GHSA-rqjq-ww83-wv5c
Severity HIGH
CVSS v3.1 Base Score 8.7
CWE Classification CWE-266: Incorrect Privilege Assignment
Affected Product Github.com/hashicorp/consul
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 8.7

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

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

How to Fix CVE-2023-2816

To remediate this vulnerability, upgrade all affected Github.com/hashicorp/consul 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/consul fixed: 1.15.3 
Upgrade github.com/hashicorp/consul to 1.15.3
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/consul

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-2816, inspect your project dependencies for Github.com/hashicorp/consul:

inspect dependencies for github.com/hashicorp/consul

Analyze the terminal output to locate any version of Github.com/hashicorp/consul in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.15.3), 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-266: Incorrect Privilege Assignment, where a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. In Github.com/hashicorp/consul, 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

Consul and Consul Enterprise allowed any user with service:write permissions to use Envoy extensions configured via service-defaults to patch remote proxy instances that target the configured service, regardless of whether the user has permission to modify the service(s) corresponding to those modified proxies.

CVE-2023-2816 Affected Github.com/hashicorp/consul Versions

1 component(s)
Fixed Versions:
1.15.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
≥ 1.15.0
< 1.15.3
1.15.3

References

NVD — CVE-2023-2816 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-2816
discuss.hashicorp.com/t/hcsec-2023-16-con... WEB
https://discuss.hashicorp.com/t/hcsec-2023-16-consul-envoy-extension-downstream-proxy-configuration-by-upstream-service-owner/54525
Github.com/hashicorp/consul Source Repository REPOSITORY
https://github.com/hashicorp/consul

Frequently Asked Questions

What is CVE-2023-2816?
CVE-2023-2816 is a security vulnerability in Github.com/hashicorp/consul involving write permissions to patch remote proxy instances under CWE-266: Incorrect Privilege Assignment.
Which Github.com/hashicorp/consul versions are affected?
Affected versions include releases prior to 1.15.3 across affected packages: github.com/hashicorp/consul.
What version fixes CVE-2023-2816?
Upgrading to 1.15.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/hashicorp/consul affected?
Yes, github.com/hashicorp/consul is affected in releases prior to 1.15.3. Upgrade your dependency to 1.15.3 or later.
What is the CVSS score of CVE-2023-2816?
CVE-2023-2816 has a CVSS v3.1 base score of 8.7 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.
What CWE is associated with CVE-2023-2816?
CVE-2023-2816 is classified under CWE-266: Incorrect Privilege Assignment (A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.).
How can I check Go dependencies for CVE-2023-2816?
Run the dependency tree command: 'inspect dependencies for github.com/hashicorp/consul'. 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-rqjq-ww83-wv5c",
  "modified" : "2023-06-06T02:04:22Z",
  "published" : "2023-06-03T00:30:16Z",
  "aliases" : [ "CVE-2023-2816" ],
  "summary" : "Hashicorp Consul allows user with service:write permissions to patch remote proxy instances",
  "details" : "Consul and Consul Enterprise allowed any user with service:write permissions to use Envoy extensions configured via service-defaults to patch remote proxy instances that target the configured service, regardless of whether the user has permission to modify the service(s) corresponding to those modified proxies.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.15.0"
      }, {
        "fixed" : "1.15.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-2816"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/hcsec-2023-16-consul-envoy-extension-downstream-proxy-configuration-by-upstream-service-owner/54525"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/hashicorp/consul"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-266" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-06T02:04:22Z",
    "nvd_published_at" : "2023-06-02T23:15:09Z"
  }
}