Bug 2168458 (CVE-2023-25165) - CVE-2023-25165 helm: getHostByName Function Information Disclosure
Summary: CVE-2023-25165 helm: getHostByName Function Information Disclosure
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2023-25165
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2170788 2170789 2170790 2170791 2170792 2170793 2170794 2170795 2170796 2170797
Blocks: 2168437
TreeView+ depends on / blocked
 
Reported: 2023-02-09 04:35 UTC by Avinash Hanwate
Modified: 2024-03-20 01:29 UTC (History)
55 users (show)

Fixed In Version: helm 3.11.1
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the helm package. The 'getHostByName' is a Helm template function introduced in Helm v3 and can 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 look up the IP address. For example, a malicious chart could inject getHostByName into a chart to disclose values to a malicious DNS server.
Clone Of:
Environment:
Last Closed: 2023-05-18 04:45:47 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:1326 0 None None None 2023-05-17 22:31:28 UTC
Red Hat Product Errata RHSA-2023:5006 0 None None None 2023-10-31 12:54:32 UTC
Red Hat Product Errata RHSA-2024:1265 0 None None None 2024-03-20 01:29:40 UTC

Description Avinash Hanwate 2023-02-09 04:35:53 UTC 
Helm is a tool that streamlines installing and managing Kubernetes applications.`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. The issue has been fixed in Helm 3.11.1. 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.

https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2
https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8
Comment 8 errata-xmlrpc 2023-05-17 22:31:25 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.13

Via RHSA-2023:1326 https://access.redhat.com/errata/RHSA-2023:1326
Comment 9 Product Security DevOps Team 2023-05-18 04:45:44 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2023-25165
Comment 10 errata-xmlrpc 2023-10-31 12:54:28 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.14

Via RHSA-2023:5006 https://access.redhat.com/errata/RHSA-2023:5006
Comment 12 errata-xmlrpc 2024-03-20 01:29:37 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.12

Via RHSA-2024:1265 https://access.redhat.com/errata/RHSA-2024:1265
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