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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                              ESB-2021.1883.2
        BIG-IP Edge Client for Windows vulnerability CVE-2021-23022
                                9 June 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           BIG-IP APM
                   BIG-IP APM Clients
Publisher:         F5 Networks
Operating System:  Windows
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-23023 CVE-2021-23022 

Original Bulletin: 
   https://support.f5.com/csp/article/K08503505
   https://support.f5.com/csp/article/K33757590

Comment: This bulletin contains two (2) F5 Networks security advisories.

Revision History:  June 9 2021: Updated fixed version details in K08503505 and K33757590
                   June 2 2021: Initial Release

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

K08503505: BIG-IP Edge Client for Windows vulnerability CVE-2021-23022

Original Publication Date: 02 Jun, 2021
Latest   Publication Date: 09 Jun, 2021

Security Advisory Description

The BIG-IP Edge Client Windows Installer Service's temporary folder has weak
file and folder permissions. (CVE-2021-23022)

Impact

This vulnerability can be exploited to allow an unprivileged user to run a
specially crafted application to gain privilege escalation on the client
Windows system. Customers are advised to update to a fixed version of the Edge
Client software as listed in the security advisory.

Security Advisory Status

F5 Product Development has assigned ID 984613, ID 1015381, and ID 1000609
(BIG-IP) to this vulnerability.

To determine if your product and version have been evaluated for this
vulnerability, refer to the Applies to (see versions) box. To determine if your
release is known to be vulnerable, the components or features that are affected
by the vulnerability, and for information about releases, point releases, or
hotfixes that address the vulnerability, refer to the following table. For more
information about security advisory versioning, refer to K51812227:
Understanding security advisory versioning.

Note: After a fix is introduced for a given minor branch, that fix applies to
all subsequent maintenance and point releases for that branch, and no
additional fixes for that branch will be listed in the table. For example, when
a fix is introduced in 14.1.2.3, the fix also applies to 14.1.2.4, and all
later 14.1.x releases (14.1.3.x., 14.1.4.x). For more information, refer to
K51812227: Understanding security advisory versioning. Additionally, software
versions preceding those listed in the following table have reached the End of
Technical Support (EoTS) phase of their lifecycle and are no longer evaluated
for security issues. For more information, refer to the Security hotfixes
section of K4602: Overview of the F5 security vulnerability response policy.

+------------------+------+-----------+----------+----------+------+----------+
|                  |      |Versions   |Fixes     |          |CVSSv3|Vulnerable|
|Product           |Branch|known to be|introduced|Severity  |score^|component |
|                  |      |vulnerable^|in        |          |2     |or feature|
|                  |      |1          |          |          |      |          |
+------------------+------+-----------+----------+----------+------+----------+
|                  |16.x  |16.0.0 -   |None^3    |          |      |          |
|                  |      |16.0.1     |          |          |      |          |
|                  +------+-----------+----------+          |      |          |
|                  |15.x  |15.1.0 -   |None^3    |          |      |          |
|                  |      |15.1.3     |          |          |      |          |
|                  +------+-----------+----------+          |      |BIG-IP    |
|                  |14.x  |14.1.0 -   |None^3    |          |      |Edge      |
|                  |      |14.1.4     |          |          |      |Client    |
|BIG-IP APM        +------+-----------+----------+High      |7.0   |Windows   |
|                  |13.x  |13.1.0 -   |None^3    |          |      |Component |
|                  |      |13.1.4     |          |          |      |Installer |
|                  +------+-----------+----------+          |      |service   |
|                  |12.x  |12.1.0 -   |Will not  |          |      |          |
|                  |      |12.1.6     |fix       |          |      |          |
|                  +------+-----------+----------+          |      |          |
|                  |11.x  |11.6.1 -   |Will not  |          |      |          |
|                  |      |11.6.5     |fix       |          |      |          |
+------------------+------+-----------+----------+----------+------+----------+
|                  |      |           |          |          |      |BIG-IP    |
|                  |      |           |          |          |      |Edge      |
|                  |      |7.2.1      |7.2.1.3   |          |      |Client    |
|BIG-IP APM Clients|7.x   |7.1.6 -    |7.1.9.9   |High      |7.0   |Windows   |
|                  |      |7.1.9      |Update 1  |          |      |Component |
|                  |      |           |          |          |      |Installer |
|                  |      |           |          |          |      |service   |
+------------------+------+-----------+----------+----------+------+----------+
|                  |16.x  |None       |Not       |          |      |          |
|                  |      |           |applicable|          |      |          |
|                  +------+-----------+----------+          |      |          |
|                  |15.x  |None       |Not       |          |      |          |
|                  |      |           |applicable|          |      |          |
|BIG-IP (LTM, AAM, +------+-----------+----------+          |      |          |
|Advanced WAF, AFM,|14.x  |None       |Not       |          |      |          |
|Analytics, ASM,   |      |           |applicable|Not       |      |          |
|DDHD, DNS, FPS,   +------+-----------+----------+vulnerable|None  |None      |
|GTM, Link         |13.x  |None       |Not       |          |      |          |
|Controller, PEM,  |      |           |applicable|          |      |          |
|SSLO)             +------+-----------+----------+          |      |          |
|                  |12.x  |None       |Not       |          |      |          |
|                  |      |           |applicable|          |      |          |
|                  +------+-----------+----------+          |      |          |
|                  |11.x  |None       |Not       |          |      |          |
|                  |      |           |applicable|          |      |          |
+------------------+------+-----------+----------+----------+------+----------+
|                  |7.x   |None       |Not       |          |      |          |
|BIG-IQ Centralized|      |           |applicable|Not       |      |          |
|Management        +------+-----------+----------+vulnerable|None  |None      |
|                  |6.x   |None       |Not       |          |      |          |
|                  |      |           |applicable|          |      |          |
+------------------+------+-----------+----------+----------+------+----------+
|F5OS              |1.x   |None       |Not       |Not       |None  |None      |
|                  |      |           |applicable|vulnerable|      |          |
+------------------+------+-----------+----------+----------+------+----------+
|Traffix SDC       |5.x   |None       |Not       |Not       |None  |None      |
|                  |      |           |applicable|vulnerable|      |          |
+------------------+------+-----------+----------+----------+------+----------+

^1F5 evaluates only software versions that have not yet reached the End of
Technical Support (EoTS) phase of their lifecycle.

^2The CVSSv3 score link takes you to a resource outside of AskF5, and it is
possible that the document may be removed without our knowledge.

^3In BIG-IP APM 13.1.0 and later, the APM Clients components can be updated
independently from the BIG-IP software. To resolve this vulnerability in BIG-IP
APM 13.1.0 and later, you can update the installed version of APM Clients to a
version listed in the Fixes introduced in column, and set Component Update to
Yes in the affected connectivity profile. For more information on Component
Update, refer to K15302: Understanding BIG-IP Edge Client Component Update
behavior for Windows, macOS, and Linux CLI. For more information about Edge
Client versions, refer to K52547540: Updating BIG-IP Edge Client for the BIG-IP
APM system and K13757: BIG-IP Edge Client version matrix.

Recommended Actions

If you are running a version listed in the Versions known to be vulnerable
column, you can eliminate this vulnerability by upgrading to a version listed
in the Fixes introduced in column. If the table lists only an older version
than what you are currently running, or does not list a non-vulnerable version,
then no upgrade candidate currently exists.

Mitigation

None

Acknowledgements

F5 acknowledges Jonas Vestberg of Sentor MSS AB and Daniel Hulliger of
Armasuisse Science+Technology, CYD Campus, for bringing this issue to our
attention and for following the highest standards of coordinated disclosure.

Supplemental Information

o K41942608: Overview of security advisory articles
  o K4602: Overview of the F5 security vulnerability response policy
  o K4918: Overview of the F5 critical issue hotfix policy
  o K9502: BIG-IP hotfix and point release matrix
  o K13123: Managing BIG-IP product hotfixes (11.x - 16.x)
  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


- --------------------------------------------------------------------------------


K33757590: BIG-IP Edge Client for Windows vulnerability CVE-2021-23023

Original Publication Date: 02 Jun, 2021
Latest   Publication Date: 09 Jun, 2021

Security Advisory Description

A DLL hijacking issue exists in cachecleaner.dll included in the BIG-IP Edge
Client Windows Installer. (CVE-2021-23023)

Impact

This vulnerability may be exploited to allow an unprivileged user to use a
malicious DLL to gain privilege escalation on the client Windows system.
Customers are advised to update to a fixed version of the BIG-IP Edge Client
software as listed in the security advisory.

Security Advisory Status

F5 Product Development has assigned ID 989317 (BIG-IP) to this vulnerability.

To determine if your product and version have been evaluated for this
vulnerability, refer to the Applies to (see versions) box. To determine if your
release is known to be vulnerable, the components or features that are affected
by the vulnerability, and for information about releases, point releases, or
hotfixes that address the vulnerability, refer to the following table. For more
information about security advisory versioning, refer to K51812227:
Understanding security advisory versioning.

Note: After a fix is introduced for a given minor branch, that fix applies to
all subsequent maintenance and point releases for that branch, and no
additional fixes for that branch will be listed in the table. For example, when
a fix is introduced in 14.1.2.3, the fix also applies to 14.1.2.4, and all
later 14.1.x releases (14.1.3.x., 14.1.4.x). For more information, refer to
K51812227: Understanding security advisory versioning. Additionally, software
versions preceding those listed in the following table have reached the End of
Technical Support (EoTS) phase of their lifecycle and are no longer evaluated
for security issues. For more information, refer to the Security hotfixes
section of K4602: Overview of the F5 security vulnerability response policy.

+------------+------+--------------+----------+----------+------+-------------+
|            |      |Versions known|Fixes     |          |CVSSv3|Vulnerable   |
|Product     |Branch|to be         |introduced|Severity  |score^|component or |
|            |      |vulnerable^1  |in        |          |2     |feature      |
+------------+------+--------------+----------+----------+------+-------------+
|            |16.x  |16.0.0 -      |None^3    |          |      |             |
|            |      |16.0.1        |          |          |      |             |
|            +------+--------------+----------+          |      |             |
|            |15.x  |15.1.0 -      |None^3    |          |      |             |
|            |      |15.1.3        |          |          |      |             |
|            +------+--------------+----------+          |      |             |
|            |14.x  |14.1.0 -      |None^3    |          |      |             |
|            |      |14.1.4        |          |          |      |BIG-IP Edge  |
|BIG-IP APM  +------+--------------+----------+High      |7.0   |Client for   |
|            |13.x  |13.1.0 -      |None^3    |          |      |Windows      |
|            |      |13.1.4        |          |          |      |             |
|            +------+--------------+----------+          |      |             |
|            |12.x  |12.1.0 -      |Will not  |          |      |             |
|            |      |12.1.6        |fix       |          |      |             |
|            +------+--------------+----------+          |      |             |
|            |11.x  |11.6.1 -      |Will not  |          |      |             |
|            |      |11.6.5        |fix       |          |      |             |
+------------+------+--------------+----------+----------+------+-------------+
|BIG-IP APM  |      |7.2.1         |7.2.1.3   |          |      |BIG-IP Edge  |
|Clients     |7.x   |7.1.6 - 7.1.9 |7.1.9.9   |High      |7.0   |Client for   |
|            |      |              |Update 1  |          |      |Windows      |
+------------+------+--------------+----------+----------+------+-------------+
|            |16.x  |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
|            +------+--------------+----------+          |      |             |
|            |15.x  |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
|            +------+--------------+----------+          |      |             |
|            |14.x  |None          |Not       |          |      |             |
|BIG-IP (all |      |              |applicable|Not       |      |             |
|other       +------+--------------+----------+vulnerable|None  |None         |
|modules)    |13.x  |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
|            +------+--------------+----------+          |      |             |
|            |12.x  |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
|            +------+--------------+----------+          |      |             |
|            |11.x  |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
+------------+------+--------------+----------+----------+------+-------------+
|            |8.x   |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
|BIG-IQ      +------+--------------+----------+          |      |             |
|Centralized |7.x   |None          |Not       |Not       |None  |None         |
|Management  |      |              |applicable|vulnerable|      |             |
|            +------+--------------+----------+          |      |             |
|            |6.x   |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
+------------+------+--------------+----------+----------+------+-------------+
|F5OS        |1.x   |None          |Not       |Not       |None  |None         |
|            |      |              |applicable|vulnerable|      |             |
+------------+------+--------------+----------+----------+------+-------------+
|Traffix SDC |5.x   |None          |Not       |Not       |None  |None         |
|            |      |              |applicable|vulnerable|      |             |
+------------+------+--------------+----------+----------+------+-------------+

^1F5 evaluates only software versions that have not yet reached the End of
Technical Support (EoTS) phase of their lifecycle.

^2The CVSSv3 score link takes you to a resource outside of AskF5, and it is
possible that the document may be removed without our knowledge.

^3In BIG-IP APM 13.1.0 and later, the APM Clients components can be updated
independently from the BIG-IP software. To resolve this vulnerability in BIG-IP
APM 13.1.0 and later, you can update the installed version of APM Clients to a
version listed in the Fixes introduced in column and set Component Update to 
Yes in the affected connectivity profile. For more information about Component
Update, refer to K15302: Understanding BIG-IP Edge Client Component Update
behavior for Windows, macOS, and Linux CLI. For more information about Edge
Client versions, refer to K52547540: Updating BIG-IP Edge Client for the BIG-IP
APM system and K13757: BIG-IP Edge Client version matrix.

Recommended Actions

If you are running a version listed in the Versions known to be vulnerable
column, you can eliminate this vulnerability by upgrading to a version listed
in the Fixes introduced in column. If the table lists only an older version
than what you are currently running, or does not list a non-vulnerable version,
then no upgrade candidate currently exists.

Mitigation

None

Acknowledgements

F5 acknowledges Jonas Vestberg of Sentor MSS AB for bringing this issue to our
attention and following the highest standards of coordinated disclosure.

Supplemental Information

o K41942608: Overview of security advisory articles
  o K4602: Overview of the F5 security vulnerability response policy
  o K4918: Overview of the F5 critical issue hotfix policy
  o K9502: BIG-IP hotfix and point release matrix
  o K13123: Managing BIG-IP product hotfixes (11.x - 16.x)
  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

- --------------------------END INCLUDED TEXT--------------------

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