Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.0509
BIG-IP APM vulnerability CVE-2021-22985
11 February 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP APM
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-22985
Original Bulletin:
https://support.f5.com/csp/article/K32049501
- --------------------------BEGIN INCLUDED TEXT--------------------
K32049501: BIG-IP APM vulnerability CVE-2021-22985
Original Publication Date: 11 Feb, 2021
Security Advisory Description
Under certain conditions, when processing VPN traffic with APM, TMM consumes
excessive memory. A malicious, authenticated VPN user may abuse this to perform
a DoS attack against the APM. (CVE-2021-22985)
Impact
The BIG-IP APM system may consume excessive memory and cause the Traffic
Management Microkernel (TMM) to exit and restart. If you configured your BIG-IP
APM system for high availability (HA), it may fail over to a standby system.
The first visible symptoms of this issue are the system triggering the memory
sweeper and terminating connections. Eventually, TMM runs out of memory and
fails over.
Security Advisory Status
F5 Product Development has assigned ID 942921 (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, point 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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |16.x |16.0.0 - |16.0.1.1 | | | |
| | |16.0.1 | | | | |
| +------+----------+----------+ | | |
| |15.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |14.x |None |Not | | | |
| | | |applicable| | | |
|BIG-IP APM +------+----------+----------+Medium |5.9 |VPN tunnel|
| |13.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
| |16.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |15.x |None |Not | | | |
| | | |applicable| | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|Advanced WAF, AFM, |14.x |None |Not | | | |
|Analytics, ASM, | | |applicable|Not | | |
|DDHD, DNS, FPS, +------+----------+----------+vulnerable|None |None |
|GTM, Link |13.x |None |Not | | | |
|Controller, PEM, | | |applicable| | | |
|SSLO) +------+----------+----------+ | | |
| |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
| |7.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
|BIG-IQ Centralized |6.x |None |Not |Not |None |None |
|Management | | |applicable|vulnerable| | |
| +------+----------+----------+ | | |
| |5.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
|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.
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 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 K9502: BIG-IP hotfix and point release matrix
o K13123: Managing BIG-IP product hotfixes (11.x - 16.x)
o K48955220: Installing an OPSWAT Endpoint Security update on BIG-IP APM
systems (11.4.x and later)
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
- --------------------------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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=/5+N
-----END PGP SIGNATURE-----