Helm up to 3.17.2 JSON Schema File stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Helm up to 3.17.2. The impacted element is an unknown function of the component JSON Schema File Handler. Executing a manipulation can lead to stack-based overflow. This vulnerability is registered as CVE-2025-32387. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Helm up to 3.17.2. This vulnerability affects an unknown part of the component JSON Schema File Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect availability. CVE summarizes:

Helm is a package manager for Charts for Kubernetes. A JSON Schema file within a chart can be crafted with a deeply nested chain of references, leading to parser recursion that can exceed the stack size limit and trigger a stack overflow. This issue has been resolved in Helm v3.17.3.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-32387 since 04/06/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 237919 (SUSE SLES15 / openSUSE 15 Security Update : helm-mirror (SUSE-SU-2025:01830-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.17.3 eliminates this vulnerability. Applying the patch d8ca55fc669645c10c0681d49723f4bb8c0b1ce7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (237919). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub_M): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 237919
Nessus Name: SUSE SLES15 / openSUSE 15 Security Update : helm-mirror (SUSE-SU-2025:01830-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Helm 3.17.3
Patch: d8ca55fc669645c10c0681d49723f4bb8c0b1ce7

Timelineinfo

04/06/2025 🔍
04/09/2025 +3 days 🔍
04/10/2025 +0 days 🔍
09/03/2025 +146 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-5xqw-8hwv-wg92
Status: Confirmed

CVE: CVE-2025-32387 (🔍)
GCVE (CVE): GCVE-0-2025-32387
GCVE (VulDB): GCVE-100-304300

Entryinfo

Created: 04/10/2025 01:25
Updated: 09/03/2025 19:17
Changes: 04/10/2025 01:25 (66), 06/08/2025 08:56 (2), 09/03/2025 19:17 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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