ESB-2018.2738 - [Appliance] F5 BIG-IP APM: Provide misleading information - Existing account 2018-09-14

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

                               ESB-2018.2738
              BIG-IP APM redirect vulnerability CVE-2018-5548
                             14 September 2018

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

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

Product:           F5 BIG-IP APM
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Provide Misleading Information -- Existing Account
Resolution:        None
CVE Names:         CVE-2018-5548  

Original Bulletin: 
   https://support.f5.com/csp/article/K66171422

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K66171422:BIG-IP APM redirect vulnerability CVE-2018-5548

Security Advisory

Original Publication Date: 08 Sep, 2018

Latest   Publication Date: 13 Sep, 2018

Security Advisory Description

An insecure AES ECB mode is used for orig_uri parameter in an undisclosed /
vdesk link of APM virtual server configured with an access profile, allowing a
malicious user to build a redirect URI value using different blocks of cipher
texts. (CVE-2018-5548)

Impact

An attacker can forge a URL with an obfuscated (encrypted and encoded) value
in an orig_uri parameter. An authenticated user with an established access
session to the BIG-IP APM system may be redirected to a malicious website
following the forged URL.


Security Advisory Status

F5 Product Development has assigned ID 510495 (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 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|          |          |      |          |
+------------------+------+----------+----------+----------+------+----------+
|                  |14.x  |None      |Not       |          |      |          |
|                  |      |          |applicable|          |      |          |
|                  +------+----------+----------+          |      |BIG-IP APM|
|                  |13.x  |None      |Not       |          |      |virtual   |
|BIG-IP APM        |      |          |applicable|Medium    |4.3   |server    |
|                  +------+----------+----------+          |      |with      |
|                  |12.x  |None      |12.0.0    |          |      |access    |
|                  +------+----------+----------+          |      |profile   |
|                  |11.x  |11.6.1 -  |None      |          |      |          |
|                  |      |11.6.3    |          |          |      |          |
+------------------+------+----------+----------+----------+------+----------+
|                  |14.x  |None      |Not       |          |      |          |
|                  |      |          |applicable|          |      |          |
|BIG-IP (LTM, AAM, +------+----------+----------+          |      |          |
|AFM, Analytics,   |13.x  |None      |Not       |          |      |          |
|ASM, DNS, Edge    |      |          |applicable|Not       |      |          |
|Gateway, FPS, GTM,+------+----------+----------+vulnerable|None  |None      |
|Link Controller,  |12.x  |None      |Not       |          |      |          |
|PEM,              |      |          |applicable|          |      |          |
|WebAccelerator)   +------+----------+----------+          |      |          |
|                  |11.x  |None      |Not       |          |      |          |
|                  |      |          |applicable|          |      |          |
+------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager|3.x   |None      |Not       |Not       |None  |None      |
|                  |      |          |applicable|vulnerable|      |          |
+------------------+------+----------+----------+----------+------+----------+
|                  |6.x   |None      |Not       |          |      |          |
|                  |      |          |applicable|          |      |          |
|                  +------+----------+----------+          |      |          |
|BIG-IQ Centralized|5.x   |None      |Not       |Not       |None  |None      |
|Management        |      |          |applicable|vulnerable|      |          |
|                  +------+----------+----------+          |      |          |
|                  |4.x   |None      |Not       |          |      |          |
|                  |      |          |applicable|          |      |          |
+------------------+------+----------+----------+----------+------+----------+
|BIG-IQ Cloud and  |1.x   |None      |Not       |Not       |None  |None      |
|Orchestration     |      |          |applicable|vulnerable|      |          |
+------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow      |2.x   |None      |Not       |Not       |None  |None      |
|                  |      |          |applicable|vulnerable|      |          |
+------------------+------+----------+----------+----------+------+----------+
|                  |5.x   |None      |Not       |          |      |          |
|                  |      |          |applicable|Not       |      |          |
|Traffix SDC       +------+----------+----------+vulnerable|None  |None      |
|                  |4.x   |None      |Not       |          |      |          |
|                  |      |          |applicable|          |      |          |
+------------------+------+----------+----------+----------+------+----------+

^1 The 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 Pierre Magne and Giuseppe Cocomazzi for bringing
this issue to our attention and for following the highest standards of
responsible disclosure.


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 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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