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             AUSCERT External Security Bulletin Redistribution

                    GnuPG vulnerability CVE-2019-13050
                             10 September 2019


        AusCERT Security Bulletin Summary

Product:           F5 Traffix SDC
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        None
CVE Names:         CVE-2019-13050  

Reference:         ESB-2019.2838

Original Bulletin: 

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K08654551:GnuPG vulnerability CVE-2019-13050

Security Advisory

Original Publication Date: 10 Sep, 2019

Security Advisory Description

Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver
network, and GnuPG through 2.2.16, makes it risky to have a GnuPG keyserver
configuration line referring to a host on the SKS keyserver network. Retrieving
data from this network may cause a persistent denial of service, because of a
Certificate Spamming Attack. (CVE-2019-13050)


Traffix SDC

The system may experience a denial-of-service (DoS) attack when it is importing
a compromised certificate from the SKS keyserver network.

BIG-IP, BIG-IQ, Enterprise Manager, and F5 iWorkflow

There is no impact; these F5 products are not affected by this vulnerability.

Security Advisory Status

F5 Product Development has assigned CPF-25134 and CPF-25135 (Traffix SDC) 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|          |            |      |          |
|                 |15.x  |None      |Not       |            |      |          |
|                 |      |          |applicable|            |      |          |
|                 +------+----------+----------+            |      |          |
|BIG-IP (LTM, AAM,|14.x  |None      |Not       |            |      |          |
|AFM, Analytics,  |      |          |applicable|            |      |          |
|APM, ASM, DNS,   +------+----------+----------+            |      |          |
|Edge Gateway,    |13.x  |None      |Not       |Not         |None  |None      |
|FPS, GTM, Link   |      |          |applicable|vulnerable^2|      |          |
|Controller, PEM, +------+----------+----------+            |      |          |
|WebAccelerator)  |12.x  |None      |Not       |            |      |          |
|                 |      |          |applicable|            |      |          |
|                 +------+----------+----------+            |      |          |
|                 |11.x  |None      |Not       |            |      |          |
|                 |      |          |applicable|            |      |          |
|Enterprise       |3.x   |None      |Not       |Not         |None  |None      |
|Manager          |      |          |applicable|vulnerable^2|      |          |
|                 |7.x   |None      |Not       |            |      |          |
|                 |      |          |applicable|            |      |          |
|BIG-IQ           +------+----------+----------+Not         |      |          |
|Centralized      |6.x   |None      |Not       |vulnerable^ |None  |None      |
|Management       |      |          |applicable|2           |      |          |
|                 +------+----------+----------+            |      |          |
|                 |5.x   |None      |Not       |            |      |          |
|                 |      |          |applicable|            |      |          |
|F5 iWorkflow     |2.x   |None      |Not       |Not         |None  |None      |
|                 |      |          |applicable|vulnerable^2|      |          |
|Traffix SDC      |5.x   |5.0.0 -   |Not       |Medium      |6.5   |GnuPG     |
|                 |      |5.1.0     |applicable|            |      |          |

^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.

^2The specified products contain the affected code. However, F5 identifies the
vulnerability status as Not vulnerable because the attacker cannot exploit the
code in default, standard, or recommended configurations.

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.



Supplemental Information

o K51812227: Understanding Security Advisory versioning
  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 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 SKS Keyserver Network Under Attack

    Note: This link takes you to a resource outside of AskF5, and it is
    possible that the document may be removed without our knowledge.

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