Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | Kubernetes | >= 1.11.0, < 1.11.9 |
| Redhat | Openshift Container Platform | 3.9 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2019/06/21/1
- http://www.openwall.com/lists/oss-security/2019/08/05/5
- http://www.securityfocus.com/bid/107652Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHBA-2019:0619
- https://access.redhat.com/errata/RHBA-2019:0620
- https://access.redhat.com/errata/RHBA-2019:0636
- https://github.com/kubernetes/kubernetes/pull/75037PatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.twistlock.com/labs-blog/disclosing-directory-traversal-vulnerability
- https://access.redhat.com/security/cve/cve-2019-1002101Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/06/21/1
- http://www.openwall.com/lists/oss-security/2019/08/05/5
- http://www.securityfocus.com/bid/107652Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHBA-2019:0619
FAQ
What is CVE-2019-1002101?
CVE-2019-1002101 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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 kube...
How severe is CVE-2019-1002101?
CVE-2019-1002101 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-1002101?
Check the references section above for vendor advisories and patch information. Affected products include: Kubernetes Kubernetes, Redhat Openshift Container Platform.