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             AUSCERT External Security Bulletin Redistribution

                   F5 Products Multiple Vulnerabilities
                               30 March 2021


        AusCERT Security Bulletin Summary

Product:           BIG-IP
                   Traffix SDC
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2020-8625  

Reference:         ESB-2021.0794

Original Bulletin: 

Revision History:  March 30 2021: Removed vulnerable versions
                   March  8 2021: Initial Release

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K13591074: BIND vulnerability CVE-2020-8625

Original Publication Date: 05 Mar, 2021
Latest   Publication Date: 30 Mar, 2021

Security Advisory Description

BIND servers are vulnerable if they are running an affected version and are
configured to use GSS-TSIG features. In a configuration which uses BIND's
default settings the vulnerable code path is not exposed, but a server can be
rendered vulnerable by explicitly setting valid values for the
tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the
default configuration is not vulnerable, GSS-TSIG is frequently used in
networks where BIND is integrated with Samba, as well as in mixed-server
environments that combine BIND servers with Active Directory domain
controllers. The most likely outcome of a successful exploitation of the
vulnerability is a crash of the named process. However, remote code execution,
while unproven, is theoretically possible. Affects: BIND 9.5.0 -> 9.11.27,
9.12.0 -> 9.16.11, and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 ->
9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 ->
9.17.1 of the BIND 9.17 development branch (CVE-2020-8625)


No F5 products are affected by this vulnerability in default, standard, or
recommended configurations. BIG-IP systems are affected by this vulnerability
only if the BIND configuration is deliberately configured to use the GSS-TSIG

Security Advisory Status

F5 Product Development has assigned ID 997173 (BIG-IP and BIG-IQ) to this

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  |None      |Not       |           |      |          |
|                  |      |          |applicable|           |      |          |
|                  +------+----------+----------+           |      |          |
|                  |15.x  |None      |Not       |           |      |          |
|                  |      |          |applicable|           |      |          |
|BIG-IP (LTM, AAM, +------+----------+----------+           |      |          |
|Advanced WAF, AFM,|14.x  |None      |Not       |           |      |          |
|Analytics, APM,   |      |          |applicable|Not        |      |          |
|ASM, DDHD, DNS,   +------+----------+----------+vulnerable^|None  |None      |
|FPS, GTM, Link    |13.x  |None      |Not       |2          |      |          |
|Controller, PEM,  |      |          |applicable|           |      |          |
|SSLO)             +------+----------+----------+           |      |          |
|                  |12.x  |None      |Not       |           |      |          |
|                  |      |          |applicable|           |      |          |
|                  +------+----------+----------+           |      |          |
|                  |11.x  |None      |Not       |           |      |          |
|                  |      |          |applicable|           |      |          |
|                  |8.x   |None      |Not       |           |      |          |
|                  |      |          |applicable|           |      |          |
|                  +------+----------+----------+Not        |      |          |
|BIG-IQ Centralized|7.x   |None      |Not       |vulnerable^|None  |None      |
|Management        |      |          |applicable|2          |      |          |
|                  +------+----------+----------+           |      |          |
|                  |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.

^2No F5 products are affected by this vulnerability in default, standard, or
recommended configurations. BIG-IP systems are affected by this vulnerability
only if the BIND configuration is deliberately configured to use the GSS-TSIG

Recommended Actions


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 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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