IT27192: SECURITY: PRIVILEGE ESCALATION DURING ROUTINE EXECUTION IN FENCED MODE (CVE-2019-4057)

APAR status

• Closed as program error.

Error description

• Db2 allows instance owner to change the fenced user to root and
  causes any fenced routines to execute with elevated privilege.
  See Security Bulletin for details:
  http://www.ibm.com/support/docview.wss?uid=ibm10880735
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All DB2 systems on all Linux and Unix platforms at service   *
  * levels Version 10.5 GA  through to Version 10.5 Fix Pack 10. *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 Version 10.5 Fix Pack 11.                     *
  ****************************************************************
  

Problem conclusion

• The complete fix for this problem first appears in Db2 Version
  10.5 Fix Pack 11 and the subsequent Fix Packs.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  IT27203 IT27204 IT27205

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels