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             AUSCERT External Security Bulletin Redistribution

When authentication is set to require, the Client SSL or Server SSL profile
      does not report an error when it has an associated invalid CRL
                               26 March 2019


        AusCERT Security Bulletin Summary

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Provide Misleading Information -- Existing Account
Resolution:        Patch/Upgrade

Original Bulletin: 

Revision History:  March 26 2019: Added latest advisory update
                   March 22 2019: Initial Release

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

K15732489:When authentication is set to require, the Client SSL or Server SSL profile does not report an error when it has an associated invalid CRL 

Security Advisory

Original Publication Date: 22 Mar, 2019

Latest   Publication Date: 26 Mar, 2019

Security Advisory Description

When authentication is set to require, the Client SSL or Server SSL profile
does not report an error when it has an associated invalid Certificate
Revocation List (CRL).

This issue occurs when all of the following conditions are met:

  o The Client SSL or Server SSL profile is associated with a virtual server.
  o The profile is associated with an invalid CRL that is not signed by a
    trusted Certificate Authority (CA).
  o The CRL issuer has the same subject name as one of the certs in the trusted
  o The client or server certificate authentication is set to require.


An invalid CRL which has not been properly signed may be used.


As a result of this issue, you may encounter the following symptom:

  o An error is not reported for the invalid CRL.

Security Advisory Status

F5 Product Development has assigned ID 654368 to this issue. F5 has confirmed
that this issue exists in the products listed in the Applies to (see versions)
box, located in the upper-right corner of this article. For information about
releases, point releases, or hotfixes that resolve this issue, refer to the
following table.

|Type of fix       |Fixes introduced |Related articles                        |
|                  |in               |                                        |
|                  |13.1.0           |                                        |
|Release           |13.0.1           |K2200: Most recent versions of F5       |
|                  |11.6.4           |software                                |
|                  |11.5.9           |                                        |
|Point release/    |13.0.0 HF1       |K9502: BIG-IP hotfix and point release  |
|hotfix            |         |matrix                                  |

Security Advisory Recommended Actions



Supplemental Information

o K51812227: Understanding Security Advisory versioning
  o K41942608: Overview of AskF5 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 - 13.x)
  o K167: Downloading software and firmware from F5
  o K9970: Subscribing to email notifications regarding F5 products

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