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CVE-2019-1002101

6.4 · MEDIUM

The kubectl cp command allows copying files between containers and the user machine.

Published Apr 1, 2019CWE-59EPSS 12.80%

Overview

CVE-2019-1002101 is a medium-severity vulnerability. It was published on April 1, 2019 and has a CVSS 3.0 base score of 6.4 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

The kubectl cp command allows copying files between containers and the user machine. To copy files from a container, Kubernetes creates a tar inside the container, copies it over the network, and kubectl unpacks it on the user’s machine. If the tar binary in the container is malicious, it could run any code and output unexpected, malicious results. An attacker could use this to write files to any path on the user’s machine when kubectl cp is called, limited only by the system permissions of the local user. The untar function can both create and follow symbolic links. The issue is resolved in kubectl v1.11.9, v1.12.7, v1.13.5, and v1.14.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2019/06/21/1Refwww.openwall.com/lists/oss-security/2019/08/05/5Refwww.securityfocus.com/bid/107652Refaccess.redhat.com/errata/RHBA-2019:0619Refaccess.redhat.com/errata/RHBA-2019:0620Refaccess.redhat.com/errata/RHBA-2019:0636GitHubgithub.com/kubernetes/kubernetes/pull/75037Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BPV2RE5RMOGUVP5WJMXKQJZUBBLAFZPZ/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QZB7E3DOZ5WDG46XAIU6K32CXHXPXB2F/Refwww.twistlock.com/labs-blog/disclosing-directory-traversal-vulnerability-kubernetes-copy-cve-2019-1002101/

How CyberStrike helps

Frequently asked questions

What is CVE-2019-1002101?

CVE-2019-1002101 is a medium-severity vulnerability. It was published on April 1, 2019 and has a CVSS 3.0 base score of 6.4 (MEDIUM).

How severe is CVE-2019-1002101?

This vulnerability has a CVSS 3.0 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-1002101?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-1002101?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-1002101 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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