ESB-2018.1635 - [Appliance] F5 BIG-IP ASM: Denial of service - Remote/unauthenticated 2018-05-31

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1635
                   DoS protection fixed in F5 BIG-IP ASM
                                31 May 2018

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

Product:           F5 BIG-IP ASM
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-5526  

Original Bulletin: 
   https://support.f5.com/csp/article/K62201098

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K62201098: BADoS vulnerability CVE-2018-5526

Security Advisory

Original Publication Date: May 31, 2018

Security Advisory Description

Under certain conditions, Behavioral DoS (BADoS) protection may fail during an
attack. (CVE-2018-5526)

Impact

BADoS protection does not function as intended.

Security Advisory Status

F5 Product Development has assigned ID 714350 and ID 714369 (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.

+-----------------------------------------------------------------------------+
|                 |      |Versions  |Fixes     |           |CVSSv3|Vulnerable |
|Product          |Branch|known to  |introduced|Severity   |score^|component  |
|                 |      |be        |in        |           |1     |or feature |
|                 |      |vulnerable|          |           |      |           |
|-----------------+------+----------+----------+-----------+------+-----------|
|                 |13.x  |13.1.0    |13.1.0.6  |           |      |admd       |
|                 |------+----------+----------|           |      |(Anomaly   |
|                 |12.x  |None      |Not       |           |      |detection  |
|BIG-IP (ASM)     |      |          |applicable|Medium     |6.5   |used by    |
|                 |------+----------+----------|           |      |BADOS      |
|                 |11.x  |None      |Not       |           |      |protection)|
|                 |      |          |applicable|           |      |           |
|-----------------+------+----------+----------+-----------+------+-----------|
|BIG-IP (LTM, AAM,|13.x  |None      |Not       |           |      |           |
|AFM, Analytics,  |      |          |applicable|           |      |           |
|APM, DNS, Edge   |------+----------+----------|Not        |      |           |
|Gateway, FPS,    |12.x  |None      |Not       |vulnerable^|None  |None       |
|GTM, Link        |      |          |applicable|2          |      |           |
|Controller, PEM, |------+----------+----------|           |      |           |
|WebAccelerator)  |11.x  |None      |Not       |           |      |           |
|                 |      |          |applicable|           |      |           |
|-----------------+------+----------+----------+-----------+------+-----------|
|ARX              |6.x   |None      |Not       |Not        |None  |None       |
|                 |      |          |applicable|vulnerable |      |           |
|-----------------+------+----------+----------+-----------+------+-----------|
|Enterprise       |3.x   |None      |Not       |Not        |None  |None       |
|Manager          |      |          |applicable|vulnerable |      |           |
|-----------------+------+----------+----------+-----------+------+-----------|
|                 |5.x   |None      |Not       |           |      |           |
|BIG-IQ           |      |          |applicable|Not        |      |           |
|Centralized      |------+----------+----------|vulnerable |None  |None       |
|Management       |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|           |      |           |
+-----------------------------------------------------------------------------+

^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.

^2 The specified products contain the affected code. However, F5 identifies the
vulnerability status as Not vulnerable because the attacker cannot exploit the
code in default, standard, or recommended configurations.

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

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