Link following in Helm - CVE-2019-18658
Published: November 12, 2019 / Updated: July 17, 2020
Vulnerability identifier: #VU30626
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-18658
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: The Helm Project
Affected software:
Helm
Helm
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
In Helm 2.x before 2.15.2, commands that deal with loading a chart as a directory or packaging a chart provide an opportunity for a maliciously designed chart to include sensitive content such as /etc/passwd, or to execute a denial of service (DoS) via a special file such as /dev/urandom, via symlinks. No version of Tiller is known to be impacted. This is a client-only issue.
How to mitigate CVE-2019-18658
Install update from vendor's website.