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             AUSCERT External Security Bulletin Redistribution

                              ESB-2022.3070.2
              K26314875: Apache vulnerability CVE-2022-26377
                               4 August 2023

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           F5OS
                   Traffix SDC
Publisher:         F5 Networks
Operating System:  Network Appliance
Resolution:        Mitigation
CVE Names:         CVE-2022-26377  

Original Bulletin: 
   https://support.f5.com/csp/article/K26314875

Comment: CVSS (Max):  6.5 CVE-2022-26377 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L)
         CVSS Source: F5 Networks
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Revision History:  August  4 2023: Significant advisory updates by vendor
                   June   24 2022: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

K26314875: Apache vulnerability CVE-2022-26377

Published Date: Jun 23, 2022
Updated Date: Aug 3, 2023

Security Advisory Description

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to
smuggle requests to the AJP server it forwards requests to. This issue affects
Apache HTTP Server Apache HTTP Server 2.4 version 2.4.53 and prior versions. (
CVE-2022-26377)

Impact

An attacker may be able to inject a crafted HTTP request into the server,
bypassing internal security controls.

Security Advisory Status

F5 Product Development has assigned ID 1117229 (BIG-IP), 1113897 and 1113897-1
(F5OS), and SDC-1961 (Traffix SDC) 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 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 Evaluated products 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      |
+------------+------+--------------+----------+----------+------+-------------+
|            |17.x  |17.0.0 -      |None      |          |      |             |
|            |      |17.1.0        |          |          |      |             |
|            +------+--------------+----------+          |      |             |
|            |16.x  |16.1.0 -      |None      |          |      |             |
|            |      |16.1.3        |          |          |      |             |
|            +------+--------------+----------+          |      |             |
|BIG-IP (all |15.x  |15.1.0 -      |None      |Medium    |6.0   |httpd        |
|modules)    |      |15.1.9        |          |          |      |             |
|            +------+--------------+----------+          |      |             |
|            |14.x  |14.1.0 -      |None      |          |      |             |
|            |      |14.1.5        |          |          |      |             |
|            +------+--------------+----------+          |      |             |
|            |13.x  |13.1.0 -      |None      |          |      |             |
|            |      |13.1.5        |          |          |      |             |
+------------+------+--------------+----------+----------+------+-------------+
|BIG-IP SPK  |1.x   |None          |Not       |Not       |None  |None         |
|            |      |              |applicable|vulnerable|      |             |
+------------+------+--------------+----------+----------+------+-------------+
|            |8.x   |None          |Not       |          |      |             |
|BIG-IQ      |      |              |applicable|Not       |      |             |
|Centralized +------+--------------+----------+vulnerable|None  |None         |
|Management  |7.x   |None          |Not       |          |      |             |
|            |      |              |applicable|          |      |             |
+------------+------+--------------+----------+----------+------+-------------+
|            |      |1.5.0         |          |          |      |             |
|            |      |1.4.0         |          |          |      |             |
|F5OS-A      |1.x   |1.3.0 - 1.3.2 |None      |Medium    |6.5   |httpd        |
|            |      |1.2.0         |          |          |      |             |
|            |      |1.1.0 - 1.1.1 |          |          |      |             |
|            |      |1.0.0 - 1.0.1 |          |          |      |             |
+------------+------+--------------+----------+----------+------+-------------+
|            |      |1.5.0 - 1.5.1 |          |          |      |             |
|F5OS-C      |1.x   |1.3.0 - 1.3.2 |None      |Medium    |6.5   |httpd        |
|            |      |1.2.0 - 1.2.2 |          |          |      |             |
|            |      |1.1.0 - 1.1.4 |          |          |      |             |
+------------+------+--------------+----------+----------+------+-------------+
|Traffix SDC |5.x   |5.2.0         |None      |Medium    |6.5   |httpd        |
|            |      |5.1.0         |          |          |      |             |
+------------+------+--------------+----------+----------+------+-------------+

^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.

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 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

F5OS

To mitigate this vulnerability for F5OS systems, restrict management access to
only trusted users and a trusted set of IP addresses.

Traffix SDC

To mitigate this vulnerability for Traffix SDC, you can disable mod_proxy_ajp
and restart httpd.

BIG-IP

Until you can install a fixed version, you can use the following sections as
temporary mitigations. These mitigations restrict access to the Configuration
utility to only trusted networks or devices, thereby limiting the attack
surface.

  o Block Configuration utility access through self IP addresses
  o Block Configuration utility access through the management interface

Block Configuration utility access through self IP addresses

You can block all access to the Configuration utility of your BIG-IP system
using self IP addresses. To do so, you can change the Port Lockdown setting to
Allow None for each self IP address on the system. If you must open any ports,
you should use the Allow Custom option, taking care to block access to the
Configuration utility. By default, the Configuration utility listens on TCP
port 443. If you modified the default port, ensure that you block access to the
alternate port you configured.

Note: Performing this action prevents all access to the Configuration utility
and iControl REST using the self IP address. These changes may also impact
other services, including breaking high availability (HA) configurations.

Before you make changes to the configuration of your self IP addresses, F5
strongly recommends that you refer to the following articles:

  o K17333: Overview of port lockdown behavior (12.x - 17.x)
  o K13092: Overview of securing access to the BIG-IP system
  o K31003634: The Configuration utility of the Single-NIC BIG-IP Virtual
    Edition now defaults to TCP port 8443
  o K51358480: The single-NIC BIG-IP VE may erroneously revert to the default
    management httpd port after a configuration reload

If you must expose port 443 on your self IP addresses and want to restrict
access to specific IP ranges, you may consider using the packet filtering
functionality built into the BIG-IP system. For more information, refer to the
following article:

  o K13383: Configuring CIDR Network Addresses for the BIG-IP packet filter

Block Configuration utility access through the management interface

To mitigate this vulnerability for affected F5 products, you should restrict
management access to F5 products to only trusted users and devices over a
secure network. For more information about securing access to BIG-IP systems,
refer to the following articles:

  o K13309: Restricting access to the Configuration utility by source IP
    address (11.x - 17.x)
  o K13092: Overview of securing access to the BIG-IP system
  o K46122561: Restricting access to the management interface using network
    firewall rules

Related Content

  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 product support policies
  o K9502: BIG-IP hotfix and point release matrix
  o K13123: Managing BIG-IP product hotfixes (11.x - 17.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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