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             AUSCERT External Security Bulletin Redistribution

        Running a CTU Diagnostics Report may leave elevated command
                      prompt after report generation
                               29 April 2021


        AusCERT Security Bulletin Summary

Product:           BIG-IP Edge Client
Publisher:         F5 Networks
Operating System:  Windows
Impact/Access:     Increased Privileges -- Existing Account
                   Reduced Security     -- Existing Account
Resolution:        Patch/Upgrade

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

K03544414: Running a CTU Diagnostics Report may leave elevated command prompt
after report generation

Original Publication Date: 29 Apr, 2021

Security Advisory Description

This issue occurs when all of the following conditions are met:

  o You run one of the following BIG-IP Edge Client for Windows versions:
       7.2.1 or later or later or later
  o You run the Client Troubleshooting Utility (CTU) Diagnostics Report with
    administrator privileges.
  o You run third-party privilege management software, such as BeyondTrust, to
    elevate BIG-IP Edge Client privileges.


After generating the Diagnostics Report, command prompts with elevated
privileges remain on the client Windows system.


As a result of this issue, you may encounter one or more of the following

  o When viewing a running process on the client system using a utility such as
    Process Explorer, you observe orphaned cmd.exe instances.
  o After running a Diagnostics Report on a client system, command prompts with
    elevated privileges remain available to non-privileged users.

Security Advisory Status

F5 Product Development has assigned ID 999317 to this issue. F5 has confirmed
that this issue exists in the products listed in the Applies to (see versions)
box, located in the upper-right corner of this article. For information about
releases, point releases, or hotfixes that resolve this issue, refer to the
following table.

Note: F5 evaluates only software versions that have not yet reached the End of
Technical Support (EoTS) phase of their lifecycle. For more information, refer
to the Security hotfixes section of K4602: Overview of the F5 security
vulnerability response policy.

|Type of fix   |Fixes         |Related articles                               |
|              |introduced in |                                               |
|Release       |None          |None                                           |
|Point release/|None          |None                                           |
|hotfix        |              |                                               |
|APM Clients   |       |K52547540: Updating BIG-IP Edge Client for the |
|              |       |BIG-IP APM system                              |

Recommended Actions


While there is no workaround for this issue, F5 recommends that you do not
attempt to run a Diagnostic Report when using BeyondTrust privilege management
software, or similar, to elevate the privilege of the BIG-IP Edge Client.
Additionally, you should not run the BIG-IP Edge Client as an administrator.

Supplemental Information

o K51812227: Understanding security advisory versioning
  o K41942608: Overview of AskF5 security advisory articles
  o K4602: Overview of the F5 security vulnerability response policy
  o K4918: Overview of the F5 critical issue hotfix policy
  o K8986: F5 software lifecycle policy
  o K9502: BIG-IP hotfix and point release matrix
  o K13123: Managing BIG-IP product hotfixes (11.x - 16.x)
  o K48955220: Installing an OPSWAT Endpoint Security update on BIG-IP APM
    systems (11.4.x and later)
  o K167: Downloading software and firmware from F5
  o K9970: Subscribing to email notifications regarding F5 products
  o K9957: Creating a custom RSS feed to view new and updated documents

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