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AUSCERT External Security Bulletin Redistribution
ESB-2019.1925
OS Kernel and SMM mode L1 Terminal Fault vulnerability CVE-2018-3620
29 May 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-3620
Reference: ASB-2018.0204
ESB-2018.2343
Original Bulletin:
https://support.f5.com/csp/article/K95275140
- --------------------------BEGIN INCLUDED TEXT--------------------
K95275140:OS Kernel and SMM mode L1 Terminal Fault vulnerability CVE-2018-3620
Security Advisory
Original Publication Date: 06 Oct, 2018
Latest Publication Date: 29 May, 2019
Security Advisory Description
Systems with microprocessors utilizing speculative execution and address
translations may allow unauthorized disclosure of information residing in the
L1 data cache to an attacker with local user access via a terminal page fault
and a side-channel analysis. (CVE-2018-3620 also known as Foreshadow-NG)
Impact
For products with None in the Versions known to be vulnerable column, there is
no impact.
BIG-IP
CVE-2018-3620 requires an attacker who is capable of providing and running
binary code of their choosing on the BIG-IP platform. This raises a high bar
for attackers attempting to target BIG-IP systems over a network and would
require an additional, unpatched, user-space remote code execution
vulnerability to exploit these new issues.
The only administrative roles on a BIG-IP system allowed to execute binary code
or exploitable analogs, such as JavaScript, are the Administrator, Resource
Administrator, Manager, and iRules Manager roles. The Administrator and
Resource Administrator users already have nearly complete access to the system
and all secrets on the system that are not protected by hardware based
encryption. The Manager and iRules Manager roles do have more restricted access
to the system, but have the ability to install new iRulesLX code. A malicious
authorized Manager or iRules Manager can install malicious binary code to
exploit these information leaks and gain more privileged access. F5 recommends
limiting access to these roles to trusted employees.
Enterprise Manager
CVE-2018-3620 requires an attacker who is capable of providing and running
binary code of their choosing on the Enterprise Manager platform. This raises a
high bar for attackers attempting to target the Enterprise Manager system over
a network and would require an additional, un-patched, user-space remote code
execution vulnerability to exploit these new issues.
BIG-IQ
CVE-2018-3620 requires an attacker who is capable of providing and running
binary code of their choosing on the BIG-IQ platform. This raises a high bar
for attackers attempting to target the BIG-IQ system over a network and would
require an additional, un-patched, user-space remote code execution
vulnerability to exploit these new issues.
F5 iWorkflow
CVE-2018-3620 requires an attacker who is capable of providing and running
binary code of their choosing on the F5 iWorkflow platform. This raises a high
bar for attackers attempting to target the F5 iWorkflow system over a network
and would require an additional, un-patched, user-space remote code execution
vulnerability to exploit these new issues.
Traffix SDC
An unprivileged attacker can use this vulnerability to read privileged memory
of the kernel or other processes and/or cross guest/host boundaries to read
host memory by conducting targeted cache side-channel attacks.
Security Advisory Status
F5 Product Development has assigned ID 740755 (BIG-IP, BIG-IQ and Enterprise
Manager) and CPF-24976 and CPF-24977 (Traffix SDC) to this vulnerability.
Additionally, BIG-IP iHealth may list Heuristic H95275140 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. 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| | | | |
+---------------------+------+----------+----------+--------+------+----------+
| |15.x |None |15.0.0 | | | |
| +------+----------+----------+ | | |
| |14.x |14.0.0 |None | | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|AFM, Analytics, APM, |13.x |13.0.0 - |None | | | |
|ASM, DNS, Edge | |13.1.1 | |Medium |5.3 |CPU |
|Gateway, FPS, +------+----------+----------+ | | |
|GTM, Link Controller,|12.x |12.1.0 - |None | | | |
|PEM, WebAccelerator) | |12.1.3 | | | | |
| +------+----------+----------+ | | |
| |11.x |11.2.1 - |None | | | |
| | |11.6.3 | | | | |
+---------------------+------+----------+----------+--------+------+----------+
|Enterprise Manager |3.x |3.1.1 |None |Medium |5.3 |CPU |
+---------------------+------+----------+----------+--------+------+----------+
| |6.x |6.0.0 - |None | | | |
| | |6.0.1 | | | | |
|BIG-IQ Centralized +------+----------+----------+ | | |
|Management |5.x |5.0.0 - |None |Medium |5.3 |CPU |
| | |5.4.0 | | | | |
| +------+----------+----------+ | | |
| |4.x |4.6.0 |None | | | |
+---------------------+------+----------+----------+--------+------+----------+
|BIG-IQ Cloud and |1.x |1.0 |None |Medium |5.3 |CPU |
|Orchestration | | | | | | |
+---------------------+------+----------+----------+--------+------+----------+
|F5 iWorkflow |2.x |2.2.0 - |None |Medium |5.3 |CPU |
| | |2.3.0 | | | | |
+---------------------+------+----------+----------+--------+------+----------+
| |5.x |5.0.0 - |None | | | |
|Traffix SDC | |5.1.0 | |Medium |5.8 |CPU |
| +------+----------+----------+ | | |
| |4.x |4.4.0 |None | | | |
+---------------------+------+----------+----------+--------+------+----------+
^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.
F5 believes that Virtual Editions running as a guest on public or private cloud
infrastructure are no more vulnerable than any other Linux based guest.
F5 believes that the highest impact realistic attack for CVE-2018-3620 may
occur in multi-tenancy Virtual Clustered Multiprocessing (vCMP) configurations.
Vulnerable platforms
BIG-IP
The following tables list only one entry for platform models that have several
variants. For example, BIG-IP 11000, BIG-IP 11050, BIG-IP 11050F, and BIG-IP
11050N are included in the table as "BIG-IP 110x0."
+-------------+---------------+-------------+
|Model |Processor Types|Vulnerable to|
| | |CVE-2018-3620|
+-------------+---------------+-------------+
|BIG-IP B21x0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP B2250 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP B4100 |AMD |N |
+-------------+---------------+-------------+
|BIG-IP B4200 |AMD |N |
+-------------+---------------+-------------+
|BIG-IP B43x0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP B44x0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 2xx0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 4xx0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 5xx0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 7xx0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 10xxx |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 12xx0 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP i2x00 |Intel, ARM |Y |
+-------------+---------------+-------------+
|BIG-IP i4x00 |Intel, ARM |Y |
+-------------+---------------+-------------+
|BIG-IP i5x00 |Intel, ARM |Y |
+-------------+---------------+-------------+
|BIG-IP i7x00 |Intel, ARM |Y |
+-------------+---------------+-------------+
|BIG-IP i10x00|Intel, ARM |Y |
+-------------+---------------+-------------+
|BIG-IP 800 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 1600 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 3600 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 3900 |Intel |Y |
+-------------+---------------+-------------+
|BIG-IP 6900 |AMD |N |
+-------------+---------------+-------------+
|BIG-IP 89x0 |AMD |N |
+-------------+---------------+-------------+
|BIG-IP 110x0 |AMD |N |
+-------------+---------------+-------------+
|BIG-IP 6400 |AMD |N |
+-------------+---------------+-------------+
BIG-IQ and Enterprise Manager
Systems with microprocessors that use speculative execution and indirect branch
prediction may allow unauthorized disclosure of information to an attacker with
local user access by way of a side-channel analysis.
To determine which vulnerabilities affect each platform and the processor type
each platform uses, refer to the following table.
+-----------------------+--------------+---------------------------+
|Model |Processor type|Vulnerable to CVE-2018-3620|
+-----------------------+--------------+---------------------------+
|BIG-IQ 7000 |Intel |Y |
+-----------------------+--------------+---------------------------+
|Enterprise Manager 4000|Intel |Y |
+-----------------------+--------------+---------------------------+
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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