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Security Bulletin: Privilege Escalation Vulnerability in WebSphere Application Server (CVE-2017-1151)

Security Bulletin


Summary

There is a potential privilege escalation vulnerability in WebSphere Application Server traditional when using the OpenID Connect (OIDC) Trust Association Interceptor (TAI). This does not affect WebSphere Application Server Liberty.

Vulnerability Details

CVEID: CVE-2017-1151
DESCRIPTION:
IBM WebSphere Application Server configured with OpenID Connect (OIDC) Trust Association Interceptor (TAI) could allow a user to gain elevated privileges on the system.
CVSS Base Score: 8.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/122292 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM WebSphere Application Server traditional:
Version 9.0
Version 8.5
Version 8.0

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF containing APAR PI74857 for each named product as soon as practical. NOTE: If you are operating in a cluster, the interim fix must be applied to each cluster member.

For WebSphere Application Server traditional and WebSphere Application Server Hypervisor edition:

For V9.0.0.0 through 9.0.0.3:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI74857
--OR--
· Apply Fix Pack 9.0.0.4 or later.

For V8.5.5.3 through 8.5.5.11:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI74857
--OR--
· Apply Fix Pack 8.5.5.12 or later.

For V8.0.0.10 through 8.0.0.13:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI74857
--OR--
· Apply Fix Pack 8.0.0.14 or later (targeted availability 16 October 2017).

REMINDER: If you are operating in a cluster, the interim fix must be applied to each cluster member.

Workarounds and Mitigations

Change the value for the com.ibm.websphere.security.InvokeTAIbeforeSSO custom property to not include the OIDC TAI class name: com.ibm.ws.security.oidc.client.RelyingParty. This property can be updated from the Administrative Console > Global Security > Custom Properties panel. When InvokeTAIbeforeSSO is not enabled for the OIDC TAI class, the timeout for the user login will be that of the LTPA token.


For more information about changing custom properties please refer to the knowledge center: https://www.ibm.com/support/knowledgecenter/SSAW57_9.0.0/com.ibm.websphere.nd.multiplatform.doc/ae/tsec_custprop_del.html

Get Notified about Future Security Bulletins

Important note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

References

Complete CVSS v3 Guide
On-line Calculator v3

Related information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

10 March 2017: original document 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.

Related information

A Japanese translation is available

Document information

More support for: WebSphere Application Server

Software version: 8.0, 8.5, 8.5.5, 9.0

Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, iOS, z/OS

Software edition: Base, Developer, Express, Network Deployment

Reference #: 1999293

Modified date: 13 March 2017


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