ESB-2023.3882 – [Appliance] Traffix SDC: CVSS (Max): 7.8 [auscert.org.au]

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AUSCERT External Security Bulletin Redistribution

ESB-2023.3882
K000135122 : Linux kernel vulnerability CVE-2023-0461
12 July 2023

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AusCERT Security Bulletin Summary
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Product: Traffix SDC
Publisher: F5 Networks
Operating System: Network Appliance
Resolution: Mitigation
CVE Names: CVE-2023-0461

Original Bulletin:
https://my.f5.com/manage/s/article/K000135122

Comment: CVSS (Max): 7.8 CVE-2023-0461 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

**AusCERT wishes to advise that there has been a delay in reporting F5 security notifications for
June, 2023 due to a technical issue which has been identified. This issue has been rectified.

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K000135122: Linux kernel vulnerability CVE-2023-0461

Published Date: Jun 20, 2023

Security Advisory Description

There is a use-after-free vulnerability in the Linux Kernel which can be
exploited to achieve local privilege escalation. To reach the vulnerability
kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be
configured, but the operation does not require any privilege. There is a
use-after-free bug of icsk_ulp_data of a struct inet_connection_sock. When
CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a
connected tcp socket. The context is not cleared if this socket is disconnected
and reused as a listener. If a new socket is created from the listener, the
context is inherited and vulnerable. The setsockopt TCP_ULP operation does not
require any privilege. We recommend upgrading past commit
2c02d41d71f90a5168391b6a5f2954112ba2307c (CVE-2023-0461)

Impact

A local authenticated user may be able to exploit the vulnerability to escalate
privileges and gain access to restricted information, make unauthorized
modifications to files, or cause a denial-of-service (DoS).

Security Advisory Status

F5 Product Development has assigned SDC-2323 (Traffix) to this vulnerability.

To determine if your product and version have been evaluated for this
vulnerability, refer to the Evaluated products 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 tables. You can
also use iHealth to diagnose a vulnerability for BIG-IP and BIG-IQ systems. For
more information about using iHealth, refer to K27404821: Using F5 iHealth to
diagnose vulnerabilities. For more information about security advisory
versioning, refer to K51812227: Understanding security advisory versioning.

In this section

o BIG-IP and BIG-IQ
o F5OS
o NGINX
o Other products

BIG-IP and BIG-IQ

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.

^1F5 evaluates only software versions that have not yet reached the End of
Technical Support (EoTS) phase of their lifecycle. For more information, refer
to the Security hotfixes section of K4602: Overview of the F5 security
vulnerability response policy.

^2The CVSSv3 score link takes you to a resource outside of MyF5, and it is
possible that the document may be removed without our knowledge.

F5OS

^2The CVSSv3 score link takes you to a resource outside of MyF5, and it is
possible that the document may be removed without our knowledge.

NGINX

^2The CVSSv3 score link takes you to a resource outside of MyF5, and it is
possible that the document may be removed without our knowledge.

Other products

^2The CVSSv3 score link takes you to a resource outside of MyF5, 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 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 that you upgrade to a version with the fix (refer to
the tables).

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

Limit access to the Traffix management command line interface to trusted users.

Related Content

o K41942608: Overview of MyF5 security advisory articles
o K12201527: Overview of Quarterly Security Notifications
o K51812227: Understanding security advisory versioning
o K4602: Overview of the F5 security vulnerability response policy
o K4918: Overview of the F5 critical issue hotfix policy
o K39757430: F5 product and services lifecycle policy index
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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This security bulletin is provided as a service to AusCERT’s members. As
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: [email protected]
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.
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