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AUSCERT External Security Bulletin Redistribution
ESB-2022.0282
K17514331: BIG-IP TMM vulnerability CVE-2022-23020
21 January 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP TMM
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2022-23020
Original Bulletin:
https://support.f5.com/csp/article/K17514331
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K17514331: BIG-IP TMM vulnerability CVE-2022-23020
Original Publication Date: 19 Jan, 2022
Latest Publication Date: 20 Jan, 2022
Security Advisory Description
When the 'Respond on Error' setting is enabled on the Request Logging profile
and configured on a virtual server, undisclosed requests can cause the Traffic
Management Microkernel (TMM) to terminate. (CVE-2022-23020)
Impact
Traffic is disrupted while the TMM process restarts. This vulnerability allows
a remote unauthenticated attacker to cause a denial-of-service (DoS) on the
BIG-IP system. There is no control plane exposure; this is a data plane issue
only. The Respond On Error setting is disabled by default on the Request
Logging profile.
Security Advisory Status
F5 Product Development has assigned ID 1031269 (BIG-IP) to this vulnerability.
This issue has been classified as CWE-476: NULL Pointer Dereference.
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.
Note: After a fix is introduced for a given minor branch, that fix applies to
all subsequent maintenance and point releases for that branch, and no
additional fixes for that branch will be listed in the table. For example, when
a fix is introduced in 14.1.2.3, the fix also applies to 14.1.2.4, and all
later 14.1.x releases (14.1.3.x., 14.1.4.x). For more information, refer to
K51812227: Understanding security advisory versioning. Additionally, software
versions preceding those listed in the Applies to (see versions) box of this
article have reached the End of Technical Support (EoTS) phase of their
lifecycle and are no longer evaluated for security issues. For more
information, refer to the Security hotfixes section of K4602: Overview of the
F5 security vulnerability response policy.
+------------+------+--------------+----------+----------+------+-------------+
| | |Versions known|Fixes | |CVSSv3|Vulnerable |
|Product |Branch|to be |introduced|Severity |score^|component or |
| | |vulnerable^1 |in | |2 |feature |
+------------+------+--------------+----------+----------+------+-------------+
| |16.x |16.1.0 - |16.1.2 | | | |
| | |16.1.1 | | | | |
| +------+--------------+----------+ | | |
| |15.x |None |Not | | | |
| | | |applicable| | | |
| +------+--------------+----------+ | | |
| |14.x |None |Not | | | |
|BIG-IP (all | | |applicable| | |LTM Request |
|modules) +------+--------------+----------+High |7.5 |Logging |
| |13.x |None |Not | | |Profile |
| | | |applicable| | | |
| +------+--------------+----------+ | | |
| |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+--------------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+------------+------+--------------+----------+----------+------+-------------+
| |8.x |None |Not | | | |
|BIG-IQ | | |applicable|Not | | |
|Centralized +------+--------------+----------+vulnerable|None |None |
|Management |7.x |None |Not | | | |
| | | |applicable| | | |
+------------+------+--------------+----------+----------+------+-------------+
|F5OS-A |1.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+------------+------+--------------+----------+----------+------+-------------+
|F5OS-C |1.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+------------+------+--------------+----------+----------+------+-------------+
|Traffix SDC |5.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+------------+------+--------------+----------+----------+------+-------------+
^1F5 evaluates only software versions that have not yet reached the End of
Technical Support (EoTS) phase of their lifecycle.
^2The CVSSv3 score link takes you to a resource outside of AskF5, and it is
possible that the document may be removed without our knowledge.
Recommended Actions
If you are running a version listed in the Versions known to be vulnerable
column, you can eliminate this vulnerability by installing a version listed in
the Fixes introduced in column. If the Fixes introduced in column does not list
a version for your branch, then no update candidate currently exists for that
branch and F5 recommends upgrading to a version with the fix (refer to the
table).
If the Fixes introduced in column lists a version prior to the one you are
running, in the same branch, then your version should have the fix.
Mitigation
To mitigate this vulnerability, you can disable the the Respond On Error
setting on the Request Logging profile. To do so, perform the following
procedure:
Impact of mitigation: Performing the following procedure should not have a
negative impact on your system.
1. From the BIG-IP Configuration utility, go to Local Traffic > Profiles >
Other > Request Logging.
2. Select the Request Logging profile configured on your virtual server.
3. Under Request Settings > Respond On Error, select Disabled.
4. Select Update.
Acknowledgements
This issue was discovered internally by F5.
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 K8986: F5 software lifecycle policy
o K9502: BIG-IP hotfix and point release matrix
o K13123: Managing BIG-IP product hotfixes (11.x - 16.x)
o K15106: Managing BIG-IQ product hotfixes
o K15113: BIG-IQ hotfix and point release matrix
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
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