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Security Bulletin: A Security Vulnerability affects IBM Cloud Private - kubectl (CVE-2019-11251)

Security Bulletin


A Security Vulnerability affects IBM Cloud Private - kubectl

Vulnerability Details

CVEID:   CVE-2019-11251
DESCRIPTION:   Kubernetes could allow a remote attacker to gain unauthorized access to the system, caused by an error in `kubectl cp` that allows a combination of two symlinks to copy a file outside of its destination directory. An attacker could exploit this vulnerability to write arbitrary files outside of the destination tree.
CVSS Base score: 5.9
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Cloud Private3.2.1 CD
IBM Cloud Private3.2.0 CD


Product defect fixes and security updates are only available for the two most recent Continuous Delivery (CD) update packages
  • IBM Cloud Private 3.2.0
  • IBM Cloud Private 3.2.1
For IBM Cloud Private 3.2.0, apply November fix pack:
For IBM Cloud Private 3.2.1, apply November fix pack:

For IBM Cloud Private 3.1.0, 3.1.1, 3.1.2:
  • Upgrade to the latest Continuous Delivery (CD) update package, IBM Cloud Private 3.2.1. 
  • If required, individual product fixes can be made available between CD update packages for resolution of problems. Contact IBM support for assistance

Workarounds and Mitigations


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Change History

25 Nov 2019: Initial Publication

*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.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location


[{"Business Unit":{"code":"BU050","label":"BU NOT IDENTIFIED"},"Product":{"code":"SSBS6K","label":"IBM Cloud Private"},"Component":"IBM Cloud Private","Platform":[{"code":"PF016","label":"Linux"}],"Version":"all","Edition":"NA"}]

Document Information

Modified date:
24 December 2019