Path traversal in Helm

1) Path traversal

EUVDB-ID: #VU31160

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-1000008

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

All versions of Helm between Helm >=2.0.0 and < 2.12.2 contains a CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in The commands `helm fetch --untar` and `helm lint some.tgz` that can result when chart archive files are unpacked a file may be unpacked outside of the target directory. This attack appears to be exploitable via a victim must run a helm command on a specially crafted chart archive. This vulnerability appears to have been fixed in 2.12.2.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Helm: 2.0.0 - 2.12.1

CPE2.3

• cpe:2.3:a:the_helm_project:helm:2.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:the_helm_project:helm:2.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:the_helm_project:helm:2.0.2:*:*:*:*:*:*:*

External links

https://helm.sh/blog/helm-security-notice-2019/index.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.