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AUSCERT External Security Bulletin Redistribution
ESB-2019.2410
BIG-IP AFM and PEM TMUI XSS vulnerability CVE-2019-6639
3 July 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP Products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Cross-site Scripting -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-6639
Original Bulletin:
https://support.f5.com/csp/article/K61002104
- --------------------------BEGIN INCLUDED TEXT--------------------
K61002104:BIG-IP AFM and PEM TMUI XSS vulnerability CVE-2019-6639
Security Advisory
Original Publication Date: 02 Jul, 2019
Security Advisory Description
Undisclosed TMUI pages for AFM and PEM Subscriber management are vulnerable to
a stored cross-site scripting (XSS) issue. This is a control plane issue only
and is not accessible from the data plane. The attack requires a malicious
resource administrator to store the XSS. (CVE-2019-6639)
Impact
A malicious, authenticated user with Resource Administrator privileges may be
able to exploit this vulnerability to allow another user with Administrator
privileges to execute system commands. When the BIG-IP system operates in
Appliance mode, the vulnerability still exists; however, an attacker cannot
force arbitrary system commands because Advanced Shell (bash) access is
disabled in Appliance mode. Without Appliance mode, arbitrary command execution
is possible when exploiting this vulnerability. This issue exists only in the
control plane and is not accessible from the data plane. The attack requires a
malicious, authenticated user with Resource Administrator privileges to store
the XSS.
Security Advisory Status
F5 Product Development has assigned ID 750460 (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. 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 or |
| | |be |in | |1 |feature |
| | |vulnerable| | | | |
+----------------+------+----------+----------+----------+------+-------------+
| |15.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |14.x |14.0.0 - |14.1.0.6 | | | |
| | |14.1.0 |14.0.0.5 | | | |
| +------+----------+----------+ | |Configuration|
| |13.x |13.0.0 - |13.1.1.5 | | |utility TMUI |
|BIG-IP (AFM, | |13.1.1 | |Medium |6.8 |pages for AFM|
|PEM) +------+----------+----------+ | |and PEM |
| |12.x |12.1.0 - |12.1.4.1 | | |Subscriber |
| | |12.1.4 | | | |management |
| +------+----------+----------+ | | |
| | |11.6.0 - | | | | |
| |11.x |11.6.3 |11.6.4 | | | |
| | |11.5.0 - |11.5.9 | | | |
| | |11.5.8 | | | | |
+----------------+------+----------+----------+----------+------+-------------+
| |14.x |None |Not | | | |
| | | |applicable| | | |
|BIG-IP (LTM, +------+----------+----------+ | | |
|AAM, Analytics, |13.x |None |Not | | | |
|APM, ASM, DNS, | | |applicable|Not | | |
|Edge Gateway, +------+----------+----------+vulnerable|None |None |
|FPS, GTM, Link |12.x |None |Not | | | |
|Controller, | | |applicable| | | |
|WebAccelerator) +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+----------------+------+----------+----------+----------+------+-------------+
|Enterprise |3.x |None |Not |Not |None |None |
|Manager | | |applicable|vulnerable| | |
+----------------+------+----------+----------+----------+------+-------------+
| |6.x |None |Not | | | |
|BIG-IQ | | |applicable|Not | | |
|Centralized +------+----------+----------+vulnerable|None |None |
|Management |5.x |None |Not | | | |
| | | |applicable| | | |
+----------------+------+----------+----------+----------+------+-------------+
|F5 iWorkflow |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.
Mitigation
To mitigate this vulnerability, you can license the BIG-IP system to operate in
Appliance mode. The underlying vulnerability will continue to exist; however,
an attacker cannot force arbitrary system commands because bash access is
disabled in Appliance mode. For information about Appliance mode, refer to
K12815: Overview of Appliance mode.
Impact of action: Appliance mode is designed for customers in especially
sensitive sectors by limiting the BIG-IP system administrative access to match
that of a typical network appliance and not a multi-user UNIX device. When a
BIG-IP system is configured in Appliance mode, the bash access to the file
system is restricted. For information about the impacts of licensing the BIG-IP
system to operate in Appliance mode, refer to K12815: Overview of Appliance
mode.
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 K167: Downloading software and firmware from F5
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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