Fix (APAR):  PH52754

Status:  Fix

Release:  8.5.5.23,8.5.5.22

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

Supersedes Fixes:  PH51982 PH50316 PH49572 PH47792 PH46897 PH48168

CMVC Defect:  xxxxxx

Byte size of APAR:  66959834

Date: 2023-02-27

Abstract:  IBM HTTP Server is vulnerable to a denial of service (CVE-2023-26281 CVSS 5.9)

Description/symptom of problem:  
PH52754 resolves the following problem:

Confidential for CVE-2023-26281


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  a newer version of the Installation Manager and the Installation Manager will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: