CVE-2023-25165: getHostByName Function Information Disclosure
First published: Wed Feb 08 2023(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Helm Helm | >=3.0.0<3.11.1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2023-25165 https://nvd.nist.gov/vuln/detail/CVE-2023-25165 https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8
- https://bugzilla.redhat.com/show_bug.cgi?id=2168458
- https://access.redhat.com/errata/RHSA-2023:1326
- https://access.redhat.com/security/cve/cve-2023-25165
- https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2
- https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8
- https://access.redhat.com/errata/RHSA-2023:5006
- https://access.redhat.com/errata/RHSA-2024:1265
Frequently Asked Questions
What is CVE-2023-25165?
CVE-2023-25165 is a vulnerability found in the helm package that allows remote attackers to perform DNS lookups.
What is the severity level of CVE-2023-25165?
The severity level of CVE-2023-25165 is medium, with a severity value of 4.
How does the getHostByName function in the helm package work?
The getHostByName function in the helm package accepts a hostname and performs a DNS lookup to return the corresponding IP address.
Which version of Helm is affected by CVE-2023-25165?
Helm version 3.11.1 is affected by CVE-2023-25165.
How can I fix the vulnerability CVE-2023-25165 in Helm?
To fix the vulnerability CVE-2023-25165, update Helm to version 3.11.1.
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