CVE-2022-2837: Github.com/coredns/coredns CoreDNS Vulnerable To Improper Restriction Vulnerability

MODERATE

Advisory Identifier: GHSA-h828-v5pv-33qx

CVSS 6.1

Published 2023-03-03

Advisory Summary

CVE-2022-2837 is a MODERATE (CVSS 6.1) coredns vulnerable to improper restriction vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Github.com/coredns/coredns libraries in the Go ecosystem. The issue involves coredns vulnerable to improper restriction of communication channel to intended endpoints. Remediation is available in the latest vendor maintenance releases.

CVE-2022-2837 at a Glance

CVE Identifier CVE-2022-2837

GHSA Identifier GHSA-h828-v5pv-33qx

Severity MODERATE

CVSS v3.1 Base Score 6.1

CWE Classification CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Affected Product Github.com/coredns/coredns

Package Ecosystem Go

Published Date 2023-03-03

Last Updated 2025-03-07

Security Impact

CVSS: 6.1

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

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction Required (UI:R)

Scope Changed (S:C)

Confidentiality Low (C:L)

Integrity Low (I:L)

Availability None (A:N)

How to Fix CVE-2022-2837

To remediate this vulnerability, upgrade all affected Github.com/coredns/coredns 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/coredns/coredns fixed: Latest secure release

Upgrade github.com/coredns/coredns to Latest secure release

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/coredns/coredns

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-2837, inspect your project dependencies for Github.com/coredns/coredns:

inspect dependencies for github.com/coredns/coredns

Analyze the terminal output to locate any version of Github.com/coredns/coredns in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-601: URL Redirection to Untrusted Site ('Open Redirect'), where the web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. In Github.com/coredns/coredns, 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

A flaw was found in coreDNS. This flaw allows a malicious user to redirect traffic intended for external top-level domains (TLD) to a pod they control by creating projects and namespaces that match the TLD.

CVE-2022-2837 Affected Github.com/coredns/coredns Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
github.com/coredns/coredns golang/github.com/coredns/coredns	Go	≤ 1.9.3

References

NVD — CVE-2022-2837 NVD

https://nvd.nist.gov/vuln/detail/CVE-2022-2837

bugzilla.redhat.com/show_bug.cgi WEB

https://bugzilla.redhat.com/show_bug.cgi?id=2118543

Github.com/coredns/coredns Source Repository REPOSITORY

https://github.com/coredns/coredns

Frequently Asked Questions

What is CVE-2022-2837?

CVE-2022-2837 is a security vulnerability in Github.com/coredns/coredns involving coreDNS vulnerable to Improper Restriction of Communication Channel to Intended Endpoints under CWE-601: URL Redirection to Untrusted Site ('Open Redirect').

Which Github.com/coredns/coredns versions are affected?

Affected versions include releases prior to current release patches across affected packages: github.com/coredns/coredns.

What version fixes CVE-2022-2837?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

Is github.com/coredns/coredns affected?

Yes, github.com/coredns/coredns is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.

What is the CVSS score of CVE-2022-2837?

CVE-2022-2837 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

What CWE is associated with CVE-2022-2837?

CVE-2022-2837 is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect') (The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.).

How can I check Go dependencies for CVE-2022-2837?

Run the dependency tree command: 'inspect dependencies for github.com/coredns/coredns'. 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-h828-v5pv-33qx",
  "modified" : "2025-03-07T21:32:14Z",
  "published" : "2023-03-03T18:30:27Z",
  "aliases" : [ "CVE-2022-2837" ],
  "summary" : "coreDNS vulnerable to Improper Restriction of Communication Channel to Intended Endpoints",
  "details" : "A flaw was found in coreDNS. This flaw allows a malicious user to redirect traffic intended for external top-level domains (TLD) to a pod they control by creating projects and namespaces that match the TLD.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/coredns/coredns"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.9.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-2837"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2118543"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/coredns/coredns"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601", "CWE-923" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-06T21:43:07Z",
    "nvd_published_at" : "2023-03-03T16:15:00Z"
  }
}

CVSS V3

6.1 MODERATE