ESB-2017.3215.4 - UPDATE [Appliance] F5 products: Access privileged data - Existing account 2018-03-12

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             AUSCERT External Security Bulletin Redistribution

                   OpenSSL vulnerability in F5 products
                               12 March 2018


        AusCERT Security Bulletin Summary

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Mitigation
CVE Names:         CVE-2017-3736  

Reference:         ASB-2017.0202

Original Bulletin:

Revision History:  March    12 2018: Documented new I5800, I5600 platforms
                                     and noted Heuristic H14363514
                   December 20 2017: Updated source text
                   December 18 2017: Corrected title
                   December 18 2017: Initial Release

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K14363514: OpenSSL vulnerability CVE-2017-3736

Security Advisory

Original Publication Date: Dec 16, 2017
Updated Date: Mar 10, 2018

Security Advisory Description

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in
OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. 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. This only affects processors that
support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation)
and later or AMD Ryzen. (CVE-2017-3736)


For configurations using iRulesLX, the connection between the iAppsLX
administrative interface and clients is vulnerable to high-complexity attacks
on DH parameters used in the HTTPS session. This vulnerability applies to the
following platforms:

  * BIG-IP I2800, I2600 (C117)
  * BIG-IP I4800, I4600 (C115)
  * BIG-IP I5800, I5600 (C119)
  * BIG-IP I7800, I7600 (C118)
  * BIG-IP I10800, I10600 (C116)

Security Advisory Status

F5 Product Development has assigned IDs 697647 and 697668 (BIG-IP) to this
vulnerability. Additionally, BIG-IP iHealth may list Heuristic H14363514 on the
Diagnostics > Identified > Medium page.

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.

|                   |      |Versions  |Fixes     |          |CVSSv3|Vulnerable|
|Product            |Branch|known to  |introduced|Severity  |score^|component |
|                   |      |be        |in        |          |1     |or feature|
|                   |      |vulnerable|          |          |      |          |
|BIG-IP (LTM, AAM,  |13.x  |13.0.0    |None      |          |      |          |
|AFM, Analytics,    |------+----------+----------|          |      |          |
|APM, ASM, DNS, Edge|12.x  |12.1.0 -  |None      |          |      |          |
|Gateway, GTM, Link |      |12.1.2    |          |High      |5.9   |iAppsLX   |
|Controller, PEM,   |------+----------+----------|          |      |          |
|WebAccelerator,    |11.x  |None      |Not       |          |      |          |
|WebSafe)           |      |          |applicable|          |      |          |
|ARX                |6.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|Enterprise Manager |3.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|BIG-IQ (Cloud,     |      |          |Not       |Not       |      |          |
|Device, Security,  |4.x   |None      |applicable|vulnerable|None  |None      |
|ADC)               |      |          |          |          |      |          |
|                   |5.x   |None      |Not       |          |      |          |
|BIG-IQ Centralized |      |          |applicable|Not       |      |          |
|Management         |------+----------+----------|vulnerable|None  |None      |
|                   |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|      |          |
|LineRate           |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|          |      |          |

^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.

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.


To mitigate this vulnerability, you can configure clients connecting to the
iAppsLX interface to use EC algorithms.

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