CVE-2018-1002100 Kubernetes arbitrary file overwrite

What is CVE-2018-1002100?

CVE-2018-1002100 is a medium-severity path traversal vulnerability in Kubernetes Kubernetes, published on 1 Jun 2018. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

In Kubernetes versions 1.5.x, 1.6.x, 1.7.x, 1.8.x, and prior to version 1.9.6, the kubectl cp command insecurely handles tar data returned from the container, and can be caused to overwrite arbitrary local files.

Weakness: CWE-20

Which versions are affected by CVE-2018-1002100?

3 open source packages ship an affected version, including k8s.io/kubernetes. It affects 1 product.

Products include Kubernetes Kubernetes.

How do I fix CVE-2018-1002100?

Upgrade k8s.io/kubernetes to 1.9.6 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2018-1002100 being exploited?

There is no known exploitation of CVE-2018-1002100 in the wild and no public exploit code.

Other vulnerabilities in Kubernetes Kubernetes

• CVE-2018-1002105 Privilege Escalation in Kubernetes Critical 9.8
• CVE-2017-1000056 Kubernetes Privilege Escalation Critical 9.8
• CVE-2016-1906 Authorization bypass in Openshift Critical 9.8
• CVE-2023-3676 Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation High 8.8
• CVE-2023-3955 Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation High 8.8

All Kubernetes Kubernetes vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-1002100, GHSA-2jq6-ffph-p4h8, GO-2023-1959.