Helm up to 3.2.3 Plugin Installation TAR Archive path traversal

Summaryinfo

A vulnerability marked as critical has been reported in Helm up to 3.2.3. This vulnerability affects unknown code of the component Plugin Installation Handler. The manipulation as part of TAR Archive leads to path traversal. This vulnerability is uniquely identified as CVE-2020-4053. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Helm up to 3.2.3. It has been rated as critical. This issue affects an unknown code of the component Plugin Installation Handler. The manipulation as part of a TAR Archive leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed 06/16/2020 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2020-4053 since 12/30/2019. The exploitation is known to be difficult. The attack may be initiated remotely. A simple authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 3.2.4 eliminates this vulnerability.

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Productinfo

Name

• Helm

Version

• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3

Website

• Product: https://github.com/helm/helm/

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