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             AUSCERT External Security Bulletin Redistribution

               BIG-IP restjavad vulnerability CVE-2020-5912
                             14 September 2020


        AusCERT Security Bulletin Summary

Product:           BIG-IP
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Overwrite Arbitrary Files -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-5912  

Original Bulletin: 

Revision History:  September 14 2020: Vendor updated advisory
                   August    26 2020: Initial Release

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K12936322:BIG-IP restjavad vulnerability CVE-2020-5912

Security Advisory

Original Publication Date: 26 Aug, 2020

Latest   Publication Date: 12 Sep, 2020

Security Advisory Description

The restjavad process dump command does not follow current best coding
practices and may overwrite arbitrary files. (CVE-2020-5912)


A locally authenticated attacker may exploit this vulnerability by overwriting
arbitrary files on the file system.

Security Advisory Status

F5 Product Development has assigned ID 837773 (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.

|                |      |Versions     |Fixes     |          |CVSSv3|Vulnerable|
|Product         |Branch|known to be  |introduced|Severity  |score^|component |
|                |      |vulnerable   |in        |          |1     |or feature|
|                |16.x  |None         |16.0.0    |          |      |          |
|                +------+-------------+----------+          |      |          |
|                |15.x  |15.1.0       |  |          |      |          |
|                |      |15.0.0-15.0.1|  |          |      |          |
|BIG-IP (LTM,    +------+-------------+----------+          |      |          |
|AAM, Advanced   |14.x  |14.1.0 -     |  |          |      |          |
|WAF, AFM,       |      |14.1.2       |          |          |      |          |
|Analytics, APM, +------+-------------+----------+High      |7.1   |restjavad |
|ASM, DDHD, DNS, |13.x  |13.1.0 -     |  |          |      |          |
|FPS, GTM, Link  |      |13.1.3       |          |          |      |          |
|Controller, PEM,+------+-------------+----------+          |      |          |
|SSLO)           |12.x  |12.1.0 -     |  |          |      |          |
|                |      |12.1.5       |          |          |      |          |
|                +------+-------------+----------+          |      |          |
|                |11.x  |11.6.1 -     |  |          |      |          |
|                |      |11.6.5       |          |          |      |          |
|                |7.x   |None         |Not       |          |      |          |
|                |      |             |applicable|          |      |          |
|BIG-IQ          +------+-------------+----------+          |      |          |
|Centralized     |6.x   |None         |Not       |Not       |None  |None      |
|Management      |      |             |applicable|vulnerable|      |          |
|                +------+-------------+----------+          |      |          |
|                |5.x   |None         |Not       |          |      |          |
|                |      |             |applicable|          |      |          |
|Traffix SDC     |5.x   |None         |Not       |Not       |None  |None      |
|                |      |             |applicable|vulnerable|      |          |

^1The CVSSv3 score link takes you to a resource outside of AskF5, and it is
possible that the document may be removed without our knowledge.

Security Advisory 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.


To mitigate this vulnerability for the BIG-IP system, you should permit
management access to F5 products only over a secure network and limit shell
access to trusted users. For more information, refer to K13309: Restricting
access to the Configuration utility by source IP address (11.x - 16.x) and
K13092: Overview of securing access to the BIG-IP system.

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
  o K13092: Overview of securing access to the BIG-IP system

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