#VU14124 Path traversal in Kubernetes - CVE-2018-1002100

Vulnerability identifier: #VU14124

Vulnerability risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1002100

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Kubernetes
Server applications / Frameworks for developing and running applications

Vendor: Kubernetes

Description

The vulnerability allows a remote attacker to conduct path traversal attack on the target system.

The vulnerability exists due to the kubectl cp command insecurely handles tar data returned from the container. A remote unauthenticated attacker can conduct path traversal attack and overwrite arbitrary local files.

Mitigation
Update to version 1.9.6.

Vulnerable software versions

Kubernetes: 1.5.0 - 1.5.8, 1.6.0 - 1.6.13, 1.7.0 - 1.7.13, 1.8.0 - 1.8.8, 1.9.0 - 1.9.3

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External links
https://github.com/kubernetes/kubernetes/issues/61297

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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.