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AUSCERT External Security Bulletin Redistribution
ESB-2018.2078.2
K19634255:TMM vulnerability CVE-2018-5535
5 December 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2018-5533
Original Bulletin:
https://support.f5.com/csp/article/K19634255
Revision History: December 5 2018: Updated product table
July 19 2018: Initial Release
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K19634255: TMM vulnerability CVE-2018-5535
Security Advisory
Original Publication Date: Jul 19, 2018
Updated Date: Dec 05, 2018
Security Advisory Description
On F5 BIG-IP, specifically crafted HTTP responses, when processed by a Virtual
Server with an associated QoE profile that has Video enabled, may cause TMM to
incorrectly buffer response data causing the TMM to restart resulting in a
Denial of Service. (CVE-2018-5535)
Impact
The vulnerability allows remote attackers to cause a denial of service (DoS) on
the BIG-IP system.
Security Advisory Status
F5 Product Development has assigned IDs 722372 and 722407 (BIG-IP) to this
vulnerability. Additionally, BIG-IP iHealth may list Heuristic H19634255 on the
Diagnostics > Identified > High 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. 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 |14.0.0 |None | | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|AFM, Analytics, |13.x |13.0.0 - |None | | |TMM |
|APM, ASM, DNS, | |13.1.1 | | | |(virtual |
|Edge Gateway, FPS,+------+----------+----------+High |7.5 |server |
|GTM, Link |12.x |12.1.0 - |None | | |with QoE |
|Controller, PEM, | |12.1.3 | | | |profile) |
|WebAccelerator) +------+----------+----------+ | | |
| |11.x |11.5.1 - |None | | | |
| | |11.6.3 | | | | |
+------------------+------+----------+----------+-----------+------+----------+
|ARX |6.x |None |Not |Not |None |None |
| | | |applicable|vulnerable | | |
+------------------+------+----------+----------+-----------+------+----------+
| | | |Not |Not | | |
|Enterprise Manager|3.x |None |applicable|vulnerable^|None |None |
| | | | |2 | | |
+------------------+------+----------+----------+-----------+------+----------+
| |6.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+Not | | |
|BIG-IQ Centralized|5.x |None |Not |vulnerable^|None |None |
|Management | | |applicable|2 | | |
| +------+----------+----------+ | | |
| |4.x |None |Not | | | |
| | | |applicable| | | |
+------------------+------+----------+----------+-----------+------+----------+
|BIG-IQ Cloud and | | |Not |Not | | |
|Orchestration |1.x |None |applicable|vulnerable^|None |None |
| | | | |2 | | |
+------------------+------+----------+----------+-----------+------+----------+
| | | |Not |Not | | |
|F5 iWorkflow |2.x |None |applicable|vulnerable^|None |None |
| | | | |2 | | |
+------------------+------+----------+----------+-----------+------+----------+
|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.
^2The 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
Mitigation is limited to removing the QoE profile from the virtual server.
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 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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