ESB-2017.2791 - [Appliance] F5 Products: Access privileged data - Remote/unauthenticated 2017-11-02

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2791
              K44512851: OpenSSL vulnerability CVE-2017-3732
                              2 November 2017

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

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

Product:           F5 Products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2017-3732  

Reference:         ASB-2017.0180
                   ASB-2017.0164
                   ASB-2017.0115
                   ASB-2017.0113
                   ASB-2017.0110
                   ASB-2017.0109

Original Bulletin: 
   https://support.f5.com/csp/article/K44512851

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K44512851: OpenSSL vulnerability CVE-2017-3732

Security Advisory

Original Publication Date: Feb 17, 2017
Updated Date: Oct 31, 2017

Applies to (see versions):

  o Product: BIG-IQ, BIG-IQ Cloud, BIG-IQ Device, BIG-IQ Security, BIG-IQ ADC,
    BIG-IQ Centralized Management
      5.1.0, 5.0.0, 4.6.0, 4.5.0, 4.4.0, 4.3.0, 4.2.0, 4.1.0, 4.0.0
  o Product: BIG-IP, BIG-IP AAM, BIG-IP AFM, BIG-IP Analytics, BIG-IP APM,
    BIG-IP ASM, BIG-IP DNS, BIG-IP Edge Gateway, BIG-IP GTM, BIG-IP Link
    Controller, BIG-IP LTM, BIG-IP PEM, BIG-IP PSM, BIG-IP WebAccelerator
      13.0.0, 12.1.2, 12.1.1, 12.1.0, 12.0.0, 11.6.2, 11.6.1, 11.6.0, 11.5.5,
      11.5.4, 11.5.3, 11.5.2, 11.5.1, 11.5.0, 11.4.1, 11.4.0, 11.2.1
  o Product: Enterprise Manager
      3.1.1
  o Product: F5 iWorkflow
      2.0.2, 2.0.1, 2.0.0
  o Product: LineRate
      2.6.1, 2.6.0, 2.5.2, 2.5.1, 2.5.0
  o Product: ARX, ARX
      6.4.0, 6.3.0, 6.2.0
  o Product: F5 WebSafe
      1.0.0
  o Product: Traffix SDC
      5.1.0, 4.4.0, 4.0.5, 4.0.2, 4.0.0
  o Product: BIG-IQ Cloud and Orchestration
      1.0.0

Security Advisory Description

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in
OpenSSL 1.0.2 before 1.0.2k and 1.1.0 before 1.1.0d. No EC algorithms are
affected. Analysis suggests that attacks against RSA and DSA as a result of
this defect would be very difficult to perform and are not believed likely.
Attacks against DH are considered just feasible (although very difficult)
because most of the work necessary to deduce information about a private key
may be performed offline. The amount of resources required for such an attack
would be very significant and likely only accessible to a limited number of
attackers. An attacker would additionally need online access to an unpatched
system using the target private key in a scenario with persistent DH parameters
and a private key that is shared between multiple clients. For example this can
occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is
very similar to CVE-2015-3193 but must be treated as a separate problem. (
CVE-2017-3732)

Impact

This vulnerability may allow an attacker to recover encryption keys.

Security Advisory Status

F5 Product Development has assigned IDs 645101 and 645098 (BIG-IP) to this
vulnerability. Additionally, BIG-IP iHealth may list Heuristic H44512851 on the
Diagnostics > Identified > Medium screen.

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:

+---------------+----------------+-----------------+----------+----------------+
|               |Versions known  |Versions known to|          |Vulnerable      |
|Product        |to be vulnerable|be not vulnerable|Severity  |component or    |
|               |                |                 |          |feature         |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |12.0.0           |          |iAppsLX         |
|BIG-IP LTM     |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |Medium    |(f5-rest-node)  |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP AAM     |13.0.0          |12.0.0           |Medium    |iAppsLX         |
|               |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |          |(f5-rest-node)  |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP AFM     |13.0.0          |12.0.0           |Medium    |iAppsLX         |
|               |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |          |(f5-rest-node)  |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP         |13.0.0          |12.0.0           |Medium    |iAppsLX         |
|Analytics      |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |          |(f5-rest-node)  |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |12.0.0           |Medium    |iAppsLX         |
|               |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |          |(f5-rest-node)  |
|BIG-IP APM     +----------------+-----------------+----------+----------------+
|               |13.0.0          |12.0.0 - 12.1.1  |          |Oracle Access   |
|               |12.1.2          |11.4.0 - 11.6.2  |Medium    |Manager         |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |12.0.0           |          |iAppsLX         |
|BIG-IP ASM     |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |Medium    |(f5-rest-node)  |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP DNS     |13.0.0          |12.0.0           |Medium    |iAppsLX         |
|               |12.1.0 - 12.1.2 |                 |          |(f5-rest-node)  |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP Edge    |None            |11.2.1           |Not       |None            |
|Gateway        |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP GTM     |None            |11.4.0 - 11.6.2  |Not       |None            |
|               |                |11.2.1           |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP Link    |13.0.0          |12.0.0           |          |iAppsLX         |
|Controller     |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |Medium    |(f5-rest-node)  |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |12.0.0           |          |iAppsLX         |
|BIG-IP PEM     |12.1.0 - 12.1.2 |11.4.0 - 11.6.2  |Medium    |(f5-rest-node)  |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP PSM     |None            |11.4.0 - 11.4.1  |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP         |None            |11.2.1           |Not       |None            |
|WebAccelerator |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP WebSafe |13.0.0          |12.0.0           |Medium    |iAppsLX         |
|               |12.1.0 - 12.1.2 |11.6.0 - 11.6.2  |          |(f5-rest-node)  |
+---------------+----------------+-----------------+----------+----------------+
|ARX            |None            |6.2.0 - 6.4.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Enterprise     |None            |3.1.1            |Not       |None            |
|Manager        |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |None            |4.0.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Device  |None            |4.2.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Security|None            |4.0.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ ADC     |None            |4.5.0            |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ         |                |5.0.0 - 5.1.0    |Not       |                |
|Centralized    |None            |4.6.0            |vulnerable|None            |
|Management     |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |                |                 |Not       |                |
|and            |None            |1.0.0            |vulnerable|None            |
|Orchestration  |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|F5 iWorkflow   |None            |2.0.0 - 2.0.2    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|LineRate       |None            |2.5.0 - 2.6.1    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Traffix SDC    |None            |5.0.0 - 5.1.0    |Not       |None            |
|               |                |4.0.0 - 4.4.0    |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+

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 Versions known to be not vulnerable 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

If you are using the iAppsLX feature, you should note the following:

  o You can mitigate this issue by using only Elliptic Curve (EC) ciphers and
    disabling Diffie-Hellman (DHE) ciphers in your environment.
  o You can partially mitigate this issue by disabling DHE ciphers.

Modifying the iAppsLX (f5-rest-node) cipher list to use only EC ciphers

To modify the cipher list to use only EC ciphers, use a text editor such as vi
to add the following line to the end of the /service/restnoded/run file:

Note: The following change will persist across reboots, but will not persist
across software upgrades.

exec /usr/bin/f5-rest-node /usr/share/rest/node/src/restnode.js
- --tls-cipher-list="ECDHE-RSA-AES128-GCM-SHA256:!RC4" -p 8105 --logLevel finest
- -i ${LOG_FILE} -s none > /var/tmp/${service}.out 2>&1

BIG-IP APM - Oracle Access Manager

To mitigate this vulnerability for Oracle Access Manager (OAM), avoid exposing
OAM services to untrusted networks.

Supplemental Information

  o K9970: Subscribing to email notifications regarding F5 products
  o K9957: Creating a custom RSS feed to view new and updated documents
  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 K13123: Managing BIG-IP product hotfixes (11.x - 13.x)
  o K9502: BIG-IP hotfix matrix

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