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

                              ESB-2021.0695.2
                           Node.js vulnerability
                               13 July 2021

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

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

Product:           BIG-IP
                   BIG-IQ Centralized Management
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-8277  

Reference:         ESB-2021.0587
                   ESB-2021.0112
                   ESB-2020.4214

Original Bulletin: 
   https://support.f5.com/csp/article/K07944249

Revision History:  July     13 2021: Vendor added fixes for BIG-IP 16.x branch
                   February 25 2021: Initial Release

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

K07944249: Node.js vulnerability CVE-2020-8277

Original Publication Date: 25 Feb, 2021

Security Advisory Description

A Node.js application that allows an attacker to trigger a DNS request for a
host of their choice could trigger a Denial of Service in versions < 15.2.1, <
14.15.1, and < 12.19.1 by getting the application to resolve a DNS record with
a larger number of responses. This is fixed in 15.2.1, 14.15.1, and 12.19.1. (
CVE-2020-8277)

Impact

BIG-IP iRules LX and BIG-IQ

A remote attacker can exploit the vulnerability with DNS resolution to cause a
denial-of-service (DoS) on the affected F5 product.

BIG-IP iApps LX

A local attacker can exploit the vulnerability with DNS resolution to cause a
denial-of-service (DoS) on the affected F5 product.

Security Advisory Status

F5 Product Development has assigned ID 975589 (BIG-IP iRules LX), ID 985541
(BIG-IP iApps LX), and ID 985541-8 (BIG-IQ) 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 -  |16.1.0    |          |      |          |
|                   |      |16.0.1    |          |          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |15.x  |15.1.0 -  |None      |High      |7.5   |iRules LX |
|                   |      |15.1.2    |          |          |      |(Node.js) |
|BIG-IP (LTM, AAM,  +------+----------+----------+          |      |          |
|Advanced WAF, AFM, |14.x  |14.1.0 -  |None      |          |      |          |
|Analytics, APM,    |      |14.1.3    |          |          |      |          |
|ASM, DDHD, DNS,    +------+----------+----------+----------+------+----------+
|FPS, GTM, Link     |13.x  |13.1.0 -  |None      |          |      |          |
|Controller, PEM,   |      |13.1.3    |          |          |      |          |
|SSLO)              +------+----------+----------+          |      |          |
|                   |12.x  |12.1.0 -  |None      |Medium    |5.5   |iApps LX  |
|                   |      |12.1.5    |          |          |      |(Node.js) |
|                   +------+----------+----------+          |      |          |
|                   |11.x  |11.6.1 -  |None      |          |      |          |
|                   |      |11.6.5    |          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |7.x   |7.1.0     |None      |          |      |          |
|BIG-IQ Centralized +------+----------+----------+High      |7.5   |Node.js   |
|Management         |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|      |          |
+-------------------+------+----------+----------+----------+------+----------+

^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

BIG-IP iApps LX

To mitigate this vulnerability, you should permit management access to the
BIG-IP system only over a secure network and restrict command-line access for
affected systems to only trusted users. For more information about this
mitigation, 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 K15106: Managing BIG-IQ product hotfixes
  o K15113: BIG-IQ hotfix and point release matrix
  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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