Fix (APAR):  PI39833

Status:  Fix

Release:  8.5.5.6

Operating System:  Windows

Supersedes Fixes:  

CMVC Defect:  xxxxxx

Byte size of APAR:  759512

Date: 2015-06-26

Abstract:  CVE-2015-1829 for IBM HTTP Server on Windows

Description/symptom of problem:  
PI39833 resolves the following problem:

ERROR DESCRIPTION:
IBM HTTP Server on Windows may be susceptible to "named pipe 
squatting attacks" from attackers with access to the web server 
operating system.  This can result in a local denial of service.

LOCAL FIX:                                                      

PROBLEM SUMMARY:
A denial of service attack can be performed by someone with 
access to the web server's machine. This is a fix for 
CVE-2015-1829. 

PROBLEM CONCLUSION:
Named pipe handling has been altered to prevent squatting attacks.

This fix is targeted for IBM HTTP Server fix packs: 
- 7.0.0.39 
- 8.0.0.11 
- 8.5.5.7 


Directions to apply fix:  
Special Instructions: None

NOTE: The user must:
* 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  a newer version of the Installation Manager and the Installation Manager will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.
* Be logged in with the same authority level when unpacking a fix, fix pack, or
  refresh pack.

The IBM Knowledge Center can provide details, if needed, on the use of the
Installation Manager to apply the interim fix:
http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp.

1) Shutdown IBM HTTP Server
2) Apply the interim fix using Installation Manager
3) Restart IBM HTTP Server


Directions to remove fix:  
The IBM Knowledge Center can provide details, if needed, on the use of the
Installation Manager to remove the interim fix:
http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp.

1) Shutdown IBM HTTP Server
2) Remove the interim fix using Installation Manager
3) Restart IBM HTTP Server


Directions to re-apply fix:  
1) Stop IBM HTTP Server.
2) Follow the directions to apply the fix.
3) Restart IBM HTTP Server.


Additional Information: