ESB-2018.0570 - [Appliance] F5 Traffix SDC: Denial of service - Existing account 2018-02-27

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             AUSCERT External Security Bulletin Redistribution

           K11274054: GNU C Library vulnerability CVE-2018-6551
                             27 February 2018


        AusCERT Security Bulletin Summary

Product:           F5 Traffix SDC
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Mitigation
CVE Names:         CVE-2018-6551  

Reference:         ESB-2018.0519

Original Bulletin:

Comment: No patch currently available. F5 recommend that command line access 
be restricted to mitigate.

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K11274054: GNU C Library vulnerability CVE-2018-6551

Security Advisory

Original Publication Date: Feb 27, 2018

Security Advisory Description

The malloc implementation in the GNU C Library (aka glibc or libc6), from
version 2.24 to 2.26 on powerpc, and only in version 2.26 on i386, did not
properly handle malloc calls with arguments close to SIZE_MAX and could return
a pointer to a heap region that is smaller than requested, eventually leading
to heap corruption. (CVE-2018-6551)


Traffix SDC

An attacker with administrative access to the command line may be able to
exploit the flaw to cause a denial of service (DoS).

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

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

Security Advisory Status

F5 Product Development has assigned INSTALLER-3079 (Traffix SDC) to this

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  |None      |Not       |          |      |          |
|AFM, Analytics,    |      |          |applicable|          |      |          |
|APM, ASM, DNS, Edge+------+----------+----------+          |      |          |
|Gateway, GTM, Link |12.x  |None      |Not       |Not       |None  |None      |
|Controller, PEM,   |      |          |applicable|vulnerable|      |          |
|WebAccelerator,    +------+----------+----------+          |      |          |
|WebSafe)           |11.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|ARX                |6.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|Enterprise Manager |3.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|                   |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   |5.0.0 -   |Not       |          |      |          |
|                   |      |5.1.0     |applicable|          |      |glibc or  |
|Traffix SDC        +------+----------+----------+Low       |3.5   |libc6     |
|                   |4.x   |4.0.5 -   |Not       |          |      |          |
|                   |      |4.4.0     |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.

Note: For details about how Security Advisory articles are versioned, and what
versions are listed in the table, refer to K51812227: Understanding Security
Advisory versioning.


To mitigate this vulnerability, you should permit management access to F5
products only over a secure network and restrict command line access for
affected systems to trusted users.

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