Fix (APAR):  PI56811

Status:  Fix

Release:  8.5.5.9,8.5.5.8

Operating System:  AIX,HP-UX,IBM i,Inspur K-UX,Linux,Solaris,Windows,z/OS

Supersedes Fixes:  

CMVC Defect:  xxxxxx

Byte size of APAR:  5812505

Date: 2016-07-13

Abstract:  Potential security vulnerability in IBM WebSphere Application Server (CVE-2015-0254)

Description/symptom of problem:  
PI56811 resolves the following problem:

ERROR DESCRIPTION:
Apache Standard Taglibs could allow a remote attacker to execute arbitrary code on the system, caused by an XML External Entity Injection (XXE) error when processing XML data. By sending specially-crafted XML data, an attacker could exploit this vulnerability to execute arbitrary code on the system.

LOCAL FIX:                                                      

PROBLEM SUMMARY:
Apache Standard Taglibs could allow a remote attacker to execute arbitrary code on the system, caused by an XML External Entity Injection (XXE) error when processing XML data. By sending specially-crafted XML data, an attacker could exploit this vulnerability to execute arbitrary code on the system.

PROBLEM CONCLUSION:
Updated the code to fix the vulnerability.


Directions to apply fix:  Fix applies to Editions:
Release 8.5
x Application Server (Express or BASE)
x Network Deployment (ND)
x Liberty Core

Install Fix to all WebSphere installations unless special instructions are included below.

Special Instructions: None

NOTE:
The user must:
* Logged in with the same authority level when unpacking a fix, fix pack or refresh pack.
* Be at V1.4.3 or newer of the Installation Manager. Certain iFixes may require a newer version of the Installation Manager and the Installation Manager will inform you during the installation process if a newer version is required.

The IBM Knowledge Center can provide details, if needed, on the use of the Installation Manager to apply the iFixes.
http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp.  Shutdown WebSphere Application Server before applying the iFixes.  Restart WebSphere Application Server after applying the iFixes.

Directions to remove fix:  

The IBM Knowledge Center can provide details, if needed, on the use of the Installation Manager to remove the iFixes.
http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp.  Shutdown WebSphere Application Server before removing the iFixes.  Restart WebSphere Application Server after removing the iFixes.

Directions to re-apply fix:  
1) Shutdown WebSphere Application Server.

2) Follow the Fix instructions to apply the fix.

3) Restart WebSphere Application Server.



Additional Information: