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AUSCERT External Security Bulletin Redistribution
ESB-2017.2687.2
K81211720: Linux kernel vulnerability CVE-2017-6214
22 December 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6214
Reference: ASB-2017.0141
ASB-2017.0067
ESB-2017.2379
ESB-2017.1179
ESB-2017.1136
ESB-2017.0614
Original Bulletin:
https://support.f5.com/csp/article/K81211720
Revision History: December 22 2017: Vendor updated source text with patched versions
October 24 2017: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
K81211720: Linux kernel vulnerability CVE-2017-6214
Security Advisory
Original Publication Date: Apr 14, 2017
Updated Date: Dec 22, 2017
Security Advisory Description
The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel before
4.9.11 allows remote attackers to cause a denial of service (infinite loop and
soft lockup) via vectors involving a TCP packet with the URG flag. (
CVE-2017-6214)
Impact
An attacker, using a specially crafted TCP packet, can force the kernel to
enter an infinite loop condition.
Security Advisory Status
F5 Product Development has assigned IDs 653879 and 653880 (BIG-IP), ID 654212
(BIG-IQ), ID 654205 (Enterprise Manager), ID 655792 (F5 iWorkflow), and
INSTALLER-2978, INSTALLER-2979, INSTALLER-2980, and INSTALLER-2981 (Traffix
SDC) to this vulnerability. Additionally, BIG-IP iHealth may list Heuristic
H81211720 on the Diagnostics > Identified > High screen.
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 known |Versions known to| |Vulnerable |
|Product |to be vulnerable|be not vulnerable|Severity |component or |
| | | | |feature |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
| |12.0.0 - 12.1.2 |12.1.3 | | |
|BIG-IP LTM |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel |
| |11.4.0 - 11.5.4 |11.5.5 | | |
| |11.2.1 | | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
|BIG-IP AAM |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel |
| |11.6.0 - 11.6.1 |11.6.2 | | |
| |11.4.0 - 11.5.4 |11.5.5 | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
|BIG-IP AFM |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel |
| |11.6.0 - 11.6.1 |11.6.2 | | |
| |11.4.0 - 11.5.4 |11.5.5 | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
|BIG-IP |12.0.0 - 12.1.2 |12.1.3 | | |
|Analytics |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel |
| |11.4.0 - 11.5.4 |11.5.5 | | |
| |11.2.1 | | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
| |12.0.0 - 12.1.2 |12.1.3 | | |
|BIG-IP APM |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel |
| |11.4.0 - 11.5.4 |11.5.5 | | |
| |11.2.1 | | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
| |12.0.0 - 12.1.2 |12.1.3 | | |
|BIG-IP ASM |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel |
| |11.4.0 - 11.5.4 |11.5.5 | | |
| |11.2.1 | | | |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IP DNS |13.0.0 |13.1.0 |High |Linux kernel |
| |12.0.0 - 12.1.2 |12.1.3 | | |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IP Edge |11.2.1 |None |High |Linux kernel |
|Gateway | | | | |
|---------------+----------------+-----------------+----------+----------------|
| |11.6.0 - 11.6.1 |11.6.2 | | |
|BIG-IP GTM |11.4.0 - 11.5.4 |11.5.5 |High |Linux kernel |
| |11.2.1 | | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
|BIG-IP Link |12.0.0 - 12.1.2 |12.1.3 | | |
|Controller |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel |
| |11.4.0 - 11.5.4 |11.5.5 | | |
| |11.2.1 | | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
|BIG-IP PEM |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel |
| |11.6.0 - 11.6.1 |11.6.2 | | |
| |11.4.0 - 11.5.4 |11.5.5 | | |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IP PSM |11.4.0 - 11.4.1 |None |High |Linux kernel |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IP |11.2.1 |None |High |Linux kernel |
|WebAccelerator | | | | |
|---------------+----------------+-----------------+----------+----------------|
| |13.0.0 |13.1.0 | | |
|BIG-IP WebSafe |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel |
| |11.6.0 - 11.6.1 |11.6.2 | | |
|---------------+----------------+-----------------+----------+----------------|
|ARX |None |6.2.0 - 6.4.0 |Not |None |
| | | |vulnerable| |
|---------------+----------------+-----------------+----------+----------------|
|Enterprise |3.1.1 |None |High |Linux kernel |
|Manager | | | | |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IQ Cloud |4.4.0 - 4.5.0 |None |High |Linux kernel |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IQ Device |4.4.0 - 4.5.0 |None |High |Linux kernel |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IQ Security|4.4.0 - 4.5.0 |None |High |Linux kernel |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IQ ADC |4.5.0 |None |High |Linux kernel |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IQ |5.0.0 - 5.1.0 | | | |
|Centralized |4.6.0 |None |High |Linux kernel |
|Management | | | | |
|---------------+----------------+-----------------+----------+----------------|
|BIG-IQ Cloud | | | | |
|and |1.0.0 |None |High |Linux kernel |
|Orchestration | | | | |
|---------------+----------------+-----------------+----------+----------------|
|F5 iWorkflow |2.0.0 - 2.1.0 |None |High |Linux kernel |
|---------------+----------------+-----------------+----------+----------------|
|LineRate |None |2.5.0 - 2.6.2 |Not |None |
| | | |vulnerable| |
|---------------+----------------+-----------------+----------+----------------|
|Traffix SDC |5.0.0 - 5.1.0 |None |High |Linux kernel |
| |4.0.0 - 4.4.0 | | | |
+------------------------------------------------------------------------------+
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 Versions known to be not vulnerable 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.
To determine the necessary upgrade path for your BIG-IQ system, you should
understand the BIG-IQ product offering name changes. For more information,
refer to K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems
.
Mitigation
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 only trusted users. For more information, refer to K13309:
Restricting access to the Configuration utility by source IP address
(11.x-13.x) and K13092: Overview of securing access to the BIG-IP system.
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