Fix (APAR):  PH26083

Status:  Fix

Release:  8.5.5.17,8.5.5.16

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

Supersedes Fixes:  

CMVC Defect:  xxxxxx

Byte size of APAR:  271638

Date: 2020-07-30

Abstract:  WebSphere Application Server Code Execution Vulnerability by local users due to Improper Handling of UNC Paths (CVE-2020-4534 CVSS Score 7.8)

Description/symptom of problem:  
PH26083 resolves the following problem:

ERROR DESCRIPTION:
WebSphere Application Server Code Execution Vulnerability by local users due to Improper Handling of UNC Paths (CVE-2020-4534 CVSS Score 7.8). 

LOCAL FIX:

PROBLEM SUMMARY:
WebSphere Application Server Code Execution Vulnerability by local users due to Improper Handling of UNC Paths (CVE-2020-4534 CVSS Score 7.8). 

PROBLEM CONCLUSION:
WebSphere Application Server Code Execution Vulnerability by local users due to Improper Handling of UNC Paths (CVE-2020-4534 CVSS Score 7.8). 


Directions to apply fix:  
NOTE: Mark with an X the:
1) Release the fix applies to
2) The Editions that apply
3) And then DELETE THIS NOTE

Fix applies to Editions:
Release 8.5
_X Application Server (Express or BASE)
_X Network Deployment (ND)
__ Liberty Core
__ Edge Components
__ Developer

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 Certain iFixes may require a newer version of the Installation Manager and the Installation Manager will inform you during the installation process if a newer version is required.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: