Operating System:

[Appliance]

Published:

18 December 2020

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

                               ESB-2020.4495
            BIG-IP - iAppsLX REST vulnerability CVE-2020-27727
                             18 December 2020

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

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

Product:           BIG-IP Products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Increased Privileges  -- Remote/Unauthenticated
                   Read-only Data Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-27727  

Original Bulletin: 
   https://support.f5.com/csp/article/K50343630

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

K50343630: iAppsLX REST vulnerability CVE-2020-27727

Original Publication Date: 17 Dec, 2020

Security Advisory Description

When an authenticated administrative user installs RPMs using the iAppsLX REST
installer, the BIG-IP system does not sufficiently validate user input,
allowing the user read access to the filesystem. (CVE-2020-27727)

Impact

An attacker can exploit this vulnerability as an authenticated administrative
user to get read-only access as root user to the filesystem on the BIG-IP
system.

Security Advisory Status

F5 Product Development has assigned ID 912969 (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  |introduced|Severity  |score^|component |
|                   |      |be        |in        |          |1     |or feature|
|                   |      |vulnerable|          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |16.x  |16.0.0    |16.0.1.1  |          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |15.x  |15.0.0 -  |15.1.1    |          |      |          |
|                   |      |15.1.0    |          |          |      |          |
|                   +------+----------+----------+          |      |          |
|BIG-IP (LTM, AAM,  |14.x  |14.1.0 -  |14.1.3.1  |          |      |          |
|AFM, Analytics,    |      |14.1.3    |          |          |      |          |
|APM, ASM, DNS, FPS,+------+----------+----------+Medium    |4.9   |iAppsLX   |
|GTM, Link          |13.x  |13.1.0 -  |13.1.3.5  |          |      |          |
|Controller, PEM)   |      |13.1.3    |          |          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |12.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |11.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |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.

Mitigation

None

Acknowledgements

F5 would like to acknowledge Krzysztof Przybylski 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 - 15.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

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