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AUSCERT External Security Bulletin Redistribution
ESB-2019.1583
IBM InfoSphere Information Server containers are vulnerable
to privilege escalation
7 May 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM InfoSphere Information Server
Publisher: IBM
Operating System: AIX
Linux variants
Windows
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-4185
Original Bulletin:
https://www.ibm.com/support/docview.wss?uid=ibm10882626
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Security Bulletin: IBM InfoSphere Information Server containers are vulnerable
to privilege escalation
Security Bulletin
Document information
More support for: InfoSphere Information Server
Software version: 11.7.1
Operating system(s): AIX, Linux, Windows
Reference #: 0882626
Modified date: 06 May 2019
Summary
A privilege escalation vulnerability was addressed in IBM InfoSphere
Information Server.
Vulnerability Details
CVEID: CVE-2019-4185
DESCRIPTION: IBM InfoSphere Information Server containers are vulnerable to
privilege escalation due to an insecurely configured component.
CVSS Base Score: 8.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
158975 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)
Affected Products and Versions
The following products, running on all supported platforms, are affected:
IBM InfoSphere Information Server: version 11.7.1
IBM InfoSphere Information Server on Cloud: version 11.7.1
Remediation/Fixes
None
Workarounds and Mitigations
Perform the following steps to secure your environment:
1. List your kube-system namespace
> kubectl get deployments -n kube-system
image-20190425180554-1
2. List the pods in your kube-system namespace
> kubectl get deployments -n kube-system
image-20190425180646-2
3. Delete the tiller pod
> kubectl delete deployment tiller-deploy --namespace=kube-system
4. Verify that the tiller pod was deleted by examining the output of command
> kubectl get deployments -n kube-system
Verify that helm is working by executing the following command:
> helm list
The output should contain the list of deployed services.
However, if the following error message is displayed:
Error: configmaps is forbidden: User
"system:serviceaccount:kube-system:default" cannot list resource "configmaps"
in API group "" in the namespace "kube-system"
Execute the following command:
> kubectl patch deploy --namespace kube-system tiller-deploy -p '
{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'
After 10 to 20 seconds, again check the output of "helm list" as
indicated above.
NOTE:
After making the above changes, if at a later point in time you need to install
a patch, you must deploy the tiller pod before installing the patch. Use the
following steps:
1. Deploy tiller
> /usr/local/bin/helm init
2. Verify that the tiller POD is created by executing the command
> kubectl get deployments -n kube-system
You should see tiller-deploy listed in the output.
3. Install the patch
4. Repeat the steps listed above to again secure your environment.
Reference
Complete CVSS v3 Guide
On-line Calculator v3
Related Information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
06 May 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
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.
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