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Security Bulletin: Remote code execution vulnerability in the JSF used by WebSphere Application Server

Security Bulletin


There is a remote code execution vulnerability in the JSF Sun Reference Implementation 1.2 used by WebSphere Application Server. The JSF Sun Reference Implementation 1.2 is used as the default in WebSphere Application Server v7.0, other versions it is not the default.

Vulnerability Details

CVEID: Not Applicable
DESCRIPTION: Apache MyFaces and Oracle Mojarra could allow a remote attacker to execute arbitrary code on the system, caused by improper configuration of ViewState settings. If ViewState is configured to use unencrypted state information, an attacker could exploit this vulnerability to execute any code residing in the server's classpath.
CVSS Base Score: 8.1
CVSS Temporal Score: See 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:

  • Version 8.5
  • Version 8.0
  • Version 7.0


The recommended solution is to apply the interim fix, Fix Pack or PTF containing APARs PI99524 for each named product as soon as practical.  JSF SunRI 1.2 is the default implementation for WebSphere Application Server Version 7.  For Version 8.0 and Version 8.5 , JSF SunRI 1.2 is not the default JSF, you would only be vulnerable if you have changed to use JSF SunRI 1.2. 

For WebSphere Application Server traditional and WebSphere Application Server Hypervisor Edition using JSF Sun Reference Implementation 1.2:

For V8.5.0.0 through (not default JSF)
· Upgrade to minimal fix pack levels as required by interim fixes and then apply Interim Fix PI99524
· Apply Fix Pack or later (targeted availability 1Q2019).

For V8.0.0.0 through (not default JSF)
· Upgrade to a minimal fix pack levels as required by interim fix and then apply Interim Fix PI99524

For V7.0.0.0 through
· Upgrade to a minimal fix pack levels as required by interim fix and then apply Interim Fix PI99524

WebSphere Application Server V7 and V8 are no longer in full support; IBM recommends upgrading to a fixed, supported version/release/platform of the product.

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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.




The vulnerability was reported to IBM by dongyicheng <>

Change History

14 August 2018: 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.


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.

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Component":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF012","label":"IBM i"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"},{"code":"PF035","label":"z\/OS"}],"Version":"8.5.5;8.0;7.0","Edition":"Advanced;Base;Developer;Enterprise;Express;Network Deployment;Single Server","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
15 August 2018