Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.2413.3
BIND vulnerability CVE-2018-5743
24 October 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP Products
F5 Enterprise Manager
F5 BIG-IQ Centralized Management
F5 iWorkflow
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-5743
Reference: ESB-2019.2164
ESB-2019.2152
ESB-2019.2082
ESB-2019.2052
Original Bulletin:
https://support.f5.com/csp/article/K74009656
Comment: This bulletin contains two (2) F5 Networks security advisories.
Revision History: October 24 2019: Vendor updated article K74009656
August 12 2019: Vendor added some affected and patched versions
July 3 2019: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
K74009656:BIND vulnerability CVE-2018-5743
Security Advisory
Original Publication Date: 25 Apr, 2019
Latest Publication Date: 10 Aug, 2019
Security Advisory Description
** RESERVED ** This candidate has been reserved by an organization or
individual that will use it when announcing a new security problem. When the
candidate has been publicized, the details for this candidate will be provided.
(CVE-2018-5743)
By design, BIND is intended to limit the number of TCP clients that can be
connected at any given time. The number of allowed connections is a tunable
parameter which, if unset, defaults to a conservative value for most servers.
Unfortunately, the code which was intended to limit the number of simultaneous
connections contains an error which can be exploited to grow the number of
simultaneous connections beyond this limit.
Impact
BIG-IP / BIG-IQ / Enterprise Manager / F5 iWorkflow
An attacker may exhaust file descriptors available to the named process; as a
result, network connections and the management of log files or zone journal
files may be affected. In BIG-IQ / Enterprise Manager / F5 iWorkflow standard
and default configurations, exposure is limited to localhost, and there is no
remote exposure.
Traffix SDC
There is no impact; this F5 product is not affected by this vulnerability.
Security Advisory Status
F5 Product Development has assigned ID 757023 (BIG-IP), ID 758914 (BIG-IQ), and
ID 758915 (F5 iWorkflow) to this vulnerability. Additionally, F5 iHealth may
list Heuristic H74009656 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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |15.x |15.0.0 |None | | | |
| +------+----------+----------+ | | |
| |14.x |14.0.0 - |14.1.0.6 | | | |
|BIG-IP (LTM, AAM, | |14.1.0 |14.0.0.5 | | | |
|AFM, Analytics, +------+----------+----------+ | | |
|APM, ASM, DNS, Edge|13.x |13.0.0 - |13.1.3 | | | |
|Gateway, FPS, GTM, | |13.1.1 | |High |7.5 |named |
|Link Controller, +------+----------+----------+ | | |
|PEM, |12.x |12.1.0 - |12.1.5 | | | |
|WebAccelerator) | |12.1.4 | | | | |
| +------+----------+----------+ | | |
| |11.x |11.5.2 - |None | | | |
| | |11.6.4 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x |3.1.1 |None |Low |2.5 |named |
+-------------------+------+----------+----------+----------+------+----------+
| |6.x |6.0.0 - |None | | | |
|BIG-IQ Centralized | |6.1.0 | | | | |
|Management +------+----------+----------+Low |2.5 |named |
| |5.x |5.0.0 - |None | | | |
| | |5.4.0 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow |2.x |2.3.0 |None |Low |2.5 |named |
+-------------------+------+----------+----------+----------+------+----------+
|Traffix SDC |5.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
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
===============================================================================
K74009656:BIND vulnerability CVE-2018-5743
Security Advisory
Original Publication Date: 25 Apr, 2019
Latest Publication Date: 23 Oct, 2019
Security Advisory Description
By design, BIND is intended to limit the number of TCP clients that can be
connected at any given time. The number of allowed connections is a tunable
parameter which, if unset, defaults to a conservative value for most servers.
Unfortunately, the code which was intended to limit the number of simultaneous
connections contained an error which could be exploited to grow the number of
simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 ->
9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview
Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 ->
9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND
9.9.0 have not been evaluated for vulnerability to CVE-2018-5743. (
CVE-2018-5743)
Impact
BIG-IP / BIG-IQ / Enterprise Manager / F5 iWorkflow
An attacker may exhaust file descriptors available to the named process; as a
result, network connections and the management of log files or zone journal
files may be affected. In BIG-IQ / Enterprise Manager / F5 iWorkflow standard
and default configurations, exposure is limited to localhost, and there is no
remote exposure.
Traffix SDC
There is no impact; this F5 product is not affected by this vulnerability.
Security Advisory Status
F5 Product Development has assigned ID 757023 (BIG-IP), ID 758914 (BIG-IQ), and
ID 758915 (F5 iWorkflow) to this vulnerability. Additionally, F5 iHealth may
list Heuristic H74009656 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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |15.x |15.0.0 |15.0.1 | | | |
| +------+----------+----------+ | | |
| |14.x |14.0.0 - |14.1.0.6 | | | |
|BIG-IP (LTM, AAM, | |14.1.0 |14.0.0.5 | | | |
|AFM, Analytics, +------+----------+----------+ | | |
|APM, ASM, DNS, Edge|13.x |13.0.0 - |13.1.3 | | | |
|Gateway, FPS, GTM, | |13.1.1 | |High |7.5 |named |
|Link Controller, +------+----------+----------+ | | |
|PEM, |12.x |12.1.0 - |12.1.5 | | | |
|WebAccelerator) | |12.1.4 | | | | |
| +------+----------+----------+ | | |
| |11.x |11.5.2 - |11.6.5.1 | | | |
| | |11.6.5 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x |3.1.1 |None |Low |2.5 |named |
+-------------------+------+----------+----------+----------+------+----------+
| |6.x |6.0.0 - |None | | | |
|BIG-IQ Centralized | |6.1.0 | | | | |
|Management +------+----------+----------+Low |2.5 |named |
| |5.x |5.0.0 - |None | | | |
| | |5.4.0 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow |2.x |2.3.0 |None |Low |2.5 |named |
+-------------------+------+----------+----------+----------+------+----------+
|Traffix SDC |5.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
^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 will not develop a fix for vulnerable products that do not already have a
fixed version listed in this article, and will not update this table with
subsequent vulnerable releases in the associated branches. F5 recommends that
you update to more recent, non-vulnerable versions whenever feasible. For more
information, refer to K4602: Overview of the F5 security vulnerability response
policy.
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
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
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=p57o
-----END PGP SIGNATURE-----