CVE-2019-1000008 : Security Advisory and Response

Helm Security Vulnerability

Understanding CVE-2019-1000008

Helm is affected by a Path Traversal vulnerability in versions between Helm >=2.0.0 and < 2.12.2, allowing files to be unpacked outside the intended directory when working with chart archive files.

What is CVE-2019-1000008?

The vulnerability involves improper limitation of a pathname to a restricted directory, impacting the commands

helm fetch --untar

and

helm lint some.tgz

.

The Impact of CVE-2019-1000008

This vulnerability could lead to files being unpacked outside the target directory when processing chart archive files, potentially compromising system integrity.

Technical Details of CVE-2019-1000008

Vulnerability Description

The issue arises from a Path Traversal flaw in Helm versions, allowing specially crafted chart archives to exploit the unpacking process.

Affected Systems and Versions

Helm versions between Helm >=2.0.0 and < 2.12.2

Exploitation Mechanism

A victim must unknowingly run a helm command on a maliciously crafted chart archive to trigger the vulnerability.

Mitigation and Prevention

Immediate Steps to Take

Upgrade to version 2.12.2 or later to mitigate the vulnerability.
Avoid running helm commands on untrusted or suspicious chart archives.

Long-Term Security Practices

Regularly update Helm to the latest version to patch security vulnerabilities.

Patching and Updates

Ensure timely installation of patches and updates to maintain system security.