CVE-2019-11246: kubectl cp allows symlink directory traversal
First published: Fri Jun 21 2019(Updated: )
The kubectl cp command allows copying files between containers and the user machine. To copy files from a container, Kubernetes runs tar inside the container to create a tar archive, 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. Kubernetes affected versions include versions prior to 1.12.9, versions prior to 1.13.6, versions prior to 1.14.2, and versions 1.1, 1.2, 1.4, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11.
Credit: jordan@liggitt.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Kubernetes Kubernetes | >=1.0.0<=1.12.10 | |
| Kubernetes Kubernetes | >=1.13.0<1.13.9 | |
| Kubernetes Kubernetes | >=1.14.0<1.14.5 | |
| Kubernetes Kubernetes | >=1.15.0<1.15.2 | |
| Kubernetes Kubernetes | =1.12.11-beta0 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-11246.
What is the severity level of CVE-2019-11246?
The severity level of CVE-2019-11246 is medium.
How does CVE-2019-11246 affect Kubernetes?
CVE-2019-11246 affects Kubernetes versions 1.0.0 to 1.15.2.
What is the impact of CVE-2019-11246?
The impact of CVE-2019-11246 is that an attacker can overwrite arbitrary files outside of the target directory.
How can I fix CVE-2019-11246?
To fix CVE-2019-11246, users should upgrade to a patched version of Kubernetes that addresses the vulnerability.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/weakness
- agent/title
- agent/author
- agent/remedy
- agent/severity
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/kubernetes
- canonical/kubernetes kubernetes
- version/kubernetes kubernetes/1.0.0
- version/kubernetes kubernetes/1.12.10
- version/kubernetes kubernetes/1.13.0
- version/kubernetes kubernetes/1.14.0
- version/kubernetes kubernetes/1.15.0
- version/kubernetes kubernetes/1.12.11-beta0