CVE-2023-25165: Helm.sh/helm/v3 Helm Vulnerable To Information Disclosure Vulnerability

MODERATE
Advisory Identifier: GHSA-pwcw-6f5g-gxf8
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CVSS 4.3
CWE-200
Published
Advisory Summary

CVE-2023-25165 is a MODERATE (CVSS 4.3) helm vulnerable to information disclosure vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Helm.sh/helm/v3 libraries in the Go ecosystem. The issue involves helm vulnerable to information disclosure via gethostbyname function. Remediation is available by upgrading affected packages to version 3.11.1.

CVE-2023-25165 at a Glance

CVE Identifier CVE-2023-25165
GHSA Identifier GHSA-pwcw-6f5g-gxf8
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Helm.sh/helm/v3
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:L/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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2023-25165

To remediate this vulnerability, upgrade all affected Helm.sh/helm/v3 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

helm.sh/helm/v3 fixed: 3.11.1 
Upgrade helm.sh/helm/v3 to 3.11.1
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 helm.sh/helm/v3

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-25165, inspect your project dependencies for Helm.sh/helm/v3:

inspect dependencies for helm.sh/helm/v3

Analyze the terminal output to locate any version of Helm.sh/helm/v3 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.11.1), 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 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Helm.sh/helm/v3, 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 Helm contributor discovered an information disclosure vulnerability using the `getHostByName` template function. ### Impact `getHostByName` is a Helm template function introduced in Helm v3. The function is able to accept a hostname and return an IP address for that hostname. To get the IP address the function performs a DNS lookup. The DNS lookup happens when used with `helm install|upgrade|template` or when the Helm SDK is used to render a chart. Information passed into the chart can be disclosed to the DNS servers used to lookup the IP address. For example, a malicious chart could inject `getHostByName` into a chart in order to disclose values to a malicious DNS server. ### Patches The issue has been fixed in Helm 3.11.1. ### Workarounds Prior to using a chart with Helm verify the `getHostByName` function is not being used in a template to disclose any information you do not want passed to DNS servers. ### For more information Helm's security policy is spelled out in detail in our [SECURITY](https://github.com/helm/community/blob/master/SECURITY.md) document. ### Credits Disclosed by Philipp Stehle at SAP.

CVE-2023-25165 Affected Helm.sh/helm/v3 Versions

1 component(s)
Fixed Versions:
3.11.1
Product / Package Ecosystem Affected Versions Fixed Version
helm.sh/helm/v3
golang/helm.sh/helm/v3
Go
≥ 3.0.0
< 3.11.1
3.11.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8
NVD — CVE-2023-25165 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-25165
Security Fix Commit FIX COMMIT
https://github.com/helm/helm/commit/293b50c65d4d56187cd4e2f390f0ada46b4c4737
Security Fix Commit FIX COMMIT
https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2
Helm.sh/helm/v3 Source Repository REPOSITORY
https://github.com/helm/helm
pkg.go.dev/vuln/go-2023-1547 WEB
https://pkg.go.dev/vuln/GO-2023-1547

Frequently Asked Questions

What is CVE-2023-25165?
CVE-2023-25165 is a security vulnerability in Helm.sh/helm/v3 involving Helm vulnerable to information disclosure via getHostByName Function under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Helm.sh/helm/v3 versions are affected?
Affected versions include releases prior to 3.11.1 across affected packages: helm.sh/helm/v3.
What version fixes CVE-2023-25165?
Upgrading to 3.11.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is helm.sh/helm/v3 affected?
Yes, helm.sh/helm/v3 is affected in releases prior to 3.11.1. Upgrade your dependency to 3.11.1 or later.
What is the CVSS score of CVE-2023-25165?
CVE-2023-25165 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2023-25165?
CVE-2023-25165 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Go dependencies for CVE-2023-25165?
Run the dependency tree command: 'inspect dependencies for helm.sh/helm/v3'. 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-pwcw-6f5g-gxf8",
  "modified" : "2023-02-08T22:36:51Z",
  "published" : "2023-02-08T22:36:51Z",
  "aliases" : [ "CVE-2023-25165" ],
  "summary" : "Helm vulnerable to information disclosure via getHostByName Function ",
  "details" : "A Helm contributor discovered an information disclosure vulnerability using the `getHostByName` template function.\n\n### Impact\n\n`getHostByName` is a Helm template function introduced in Helm v3. The function is able to accept a hostname and return an IP address for that hostname. To get the IP address the function performs a DNS lookup. The DNS lookup happens when used with `helm install|upgrade|template` or when the Helm SDK is used to render a chart.\n\nInformation passed into the chart can be disclosed to the DNS servers used to lookup the IP address. For example, a malicious chart could inject `getHostByName` into a chart in order to disclose values to a malicious DNS server.\n\n### Patches\n\nThe issue has been fixed in Helm 3.11.1.\n\n### Workarounds\n\nPrior to using a chart with Helm verify the `getHostByName` function is not being used in a template to disclose any information you do not want passed to DNS servers.\n\n### For more information\n\nHelm's security policy is spelled out in detail in our [SECURITY](https://github.com/helm/community/blob/master/SECURITY.md) document.\n\n### Credits\n\nDisclosed by Philipp Stehle at SAP.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "helm.sh/helm/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.11.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-25165"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/helm/helm/commit/293b50c65d4d56187cd4e2f390f0ada46b4c4737"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/helm/helm"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2023-1547"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-08T22:36:51Z",
    "nvd_published_at" : "2023-02-08T20:15:00Z"
  }
}