Security Bulletin: IBM Cloud Kubernetes Service is affected by a Python security vulnerability (CVE-2019-10160)

Summary

IBM Cloud Kubernetes Service is vulnerable to CVE-2019-10160 Python security vulnerability which could allow a remote attacker to obtain sensitive information, caused by improper unicode encoding handling.

Vulnerability Details

CVE-ID: CVE-2019-10160

Description: Python urllib.parse.urlsplit and urllib.parse.urlparse components could allow a remote attacker to obtain sensitive information, caused by improper unicode encoding handling. By using a specially-crafted URL, an attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 7.5
CVSS Temporal Score: <https://exchange.xforce.ibmcloud.com/vulnerabilities/162358&gt; for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

IBM Cloud Kubernetes Service 1.15.0-1.15.2
IBM Cloud Kubernetes Service 1.14.0-1.14.5
IBM Cloud Kubernetes Service 1.13.0-1.13.9
IBM Cloud Kubernetes Service 1.5-1.12

Remediation/Fixes

Updates for IBM Cloud Kubernetes Service clusters at versions 1.13 and later are available that fix these vulnerabilities. IBM Cloud Kubernetes Service will attempt to automatically update your cluster master. However, in some situations, the update may not complete. In addition, you must update cluster worker nodes created before the fix was available to address these vulnerabilities.

To verify your clusters are no longer exposed, use the following IBM Cloud CLI commands to confirm the currently running versions:

ibmcloud ks clusters
ibmcloud ks workers --cluster <cluster name or ID>

If your cluster versions are at one of the following levels or later, your clusters are no longer exposed to these vulnerabilities:

1.13.10
1.14.6
1.15.3

If one or more of your clusters is at version 1.13, 1.14 or 1.15 and has not had its master automatically updated then use the following IBM Cloud CLI command to complete the cluster master update, replacing “1.##” with the target version.

ibmcloud ks cluster-update --cluster <cluster name or ID> --kube-version 1.##

Once your clusters have completed their master updates, see Updating worker nodes for details on updating worker nodes still exposed to these vulnerabilities.

Customers running IBM Cloud Kubernetes Service clusters at versions 1.11 or 1.12 must upgrade their affected clusters to version 1.13. Customers running IBM Cloud Kubernetes Service clusters at version 1.10 must upgrade first to version 1.12 and then to version 1.13. Please review the documentation before starting an upgrade since additional actions may be required.

If you are running IBM Cloud Kubernetes Service clusters at version 1.5, 1.7, 1.8 or 1.9, there is no migration path.

Note: IBM Cloud Kubernetes Service versions 1.5, 1.7, 1.8, 1.9, 1.10 and 1.11 are no longer supported, and version 1.12 is deprecated. See the IBM Cloud Kubernetes Service Version information and update actions documentation for more information about Kubernetes versions and version support policies.

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

DD MMM 2019: Original version published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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