Bug 1848497 (CVE-2020-4053)

Summary:	CVE-2020-4053 helm: allows path traversal when installing plugins from a tar archive over HTTP
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dbecker, gparvin, jjoyce, jramanat, jschluet, jweiser, lhh, lpeer, mburns, rhos-maint, sclewis, slinaber, stcannon, tfister, thee
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	helm 3.2.3	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Helm plugin installation, where it was vulnerable to path traversal attacks. This flaw allows an attacker to create specially crafted plugin archives to create files outside of the plugin directory. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 05:01:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1851814
Bug Blocks:	1848498

Description Guilherme de Almeida Suckevicz 2020-06-18 13:12:53 UTC

In Helm greater than or equal to 3.0.0 and less than 3.2.4, a path traversal attack is possible when installing Helm plugins from a tar archive over HTTP. It is possible for a malicious plugin author to inject a relative path into a plugin archive, and copy a file outside of the intended directory. This has been fixed in 3.2.4.

Reference:
https://github.com/helm/helm/security/advisories/GHSA-qq3j-xp49-j73f

Upstream commit:
https://github.com/helm/helm/commit/0ad800ef43d3b826f31a5ad8dfbb4fe05d143688