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Nov 16, 2022 For details about recent vulnerabilities, refer to K97843387:
Overview of F5 vulnerabilities (November 2022).

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Nov 01, 2022 BIG-IP 13.1.x reaches EoSD on December 31, 2022. Upgrade to 14.1.x
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 * AskF5 Home
   
 * K13325942
   


K13325942: APPLIANCE MODE ICONTROL REST VULNERABILITY CVE-2022-41800

SECURITY ADVISORY



Original Publication Date: Nov 10, 2022
Updated Date: Nov 22, 2022

Applies to (see versions):
   
 * Product: BIG-IQ, BIG-IQ Centralized Management
   * 8.2.0, 8.1.0, 8.0.0, 7.1.0
   
 * Product: BIG-IP, BIG-IP AFM, BIG-IP Analytics, BIG-IP APM, BIG-IP ASM, BIG-IP
   DNS, BIG-IP FPS, BIG-IP GTM, BIG-IP Link Controller, BIG-IP LTM, BIG-IP PEM,
   BIG-IP AAM
   * 17.0.0, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 15.1.8, 15.1.7, 15.1.6, 15.1.5,
     15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2,
     14.1.0, 13.1.5, 13.1.4, 13.1.3, 13.1.1, 13.1.0
   
 * Product: F5OS, F5OS-A, F5OS-C
   * 1.5.0, 1.3.2, 1.3.1, 1.3.0, 1.2.0, 1.1.1, 1.1.0, 1.0.1, 1.0.0
   
 * Product: NGINX Products, NGINX Plus, NGINX App Protect WAF, NGINX App Protect
   DoS, NGINX Unit, NGINX Ingress Controller, NGINX Instance Manager, NGINX
   Service Mesh, NGINX Controller, NGINX API Connectivity Manager
   * R27, R26, R25, R24, R23, R22, 3.9.1, 3.9.0, 3.8.0, 3.7.0, 3.6.0, 3.5.0,
     3.4.0, 3.3.0, 3.22.5, 3.22.4, 3.22.3, 3.22.2, 3.22.1, 3.22.0, 3.21.0,
     3.20.1, 3.20.0, 3.2.0, 3.19.4-APIM, 3.19.3-APIM, 3.19.2-APIM, 3.19.1-APIM,
     3.19.0-APIM, 3.18.3, 3.18.2, 3.18.1-APIM, 3.18.1, 3.18.0-APIM, 3.18.0,
     3.17.0, 3.16.1, 3.15.0, 3.14.0, 3.13.0, 3.12.1, 3.12.0, 3.11.0, 3.10.0,
     3.1.0, 3.0.0, 2.5.1, 2.5.0, 2.4.1, 2.4.0, 2.3.1, 2.3.0, 2.2.2, 2.2.1,
     2.2.0, 2.1.2, 2.1.1, 2.1.0, 2.0.3, 2.0.2, 2.0.1, 2.0.0, 1.9.1, 1.9.0,
     1.6.0, 1.5.0, 1.4.1, 1.4.0, 1.3.1, 1.3.0, 1.28.0, 1.27.0, 1.26.1, 1.26.0,
     1.25.0, 1.24.0, 1.23.0, 1.22.0, 1.21.0, 1.20.0, 1.2.0, 1.12.5, 1.12.4,
     1.12.3, 1.12.2, 1.12.1, 1.12.0, 1.11.2, 1.11.1, 1.11.0, 1.10.1, 1.10.0,
     1.1.1, 1.1.0, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0
   
 * Product: 5G Products, BIG-IP SPK
   * 1.6.0, 1.5.0
   
 * Product: Traffix SDC
   * 5.2.0, 5.1.0
   
 * Product: F5 App Protect, F5 SSL Orchestrator, F5 DDoS Hybrid Defender
   * 17.0.0, 16.1.3, 16.1.1, 16.1.0, 15.1.1, 15.1.0, 14.1.4, 14.1.2, 14.1.0
   

SECURITY ADVISORY DESCRIPTION

When running in Appliance mode, an authenticated user assigned the Administrator
role may be able to bypass Appliance mode restrictions, utilizing an undisclosed
iControl REST endpoint. A successful exploit can allow the attacker to cross a
security boundary. (CVE-2022-41800)

Impact

In Appliance mode, an authenticated user with valid user credentials assigned
the Administrator role may be able to bypass Appliance mode restrictions. This
is a control plane issue; there is no data plane exposure. Appliance mode is
enforced by a specific license or may be enabled or disabled for individual
Virtual Clustered Multiprocessing (vCMP) guest instances.

For more information about Appliance mode, refer to K12815: Overview of
Appliance mode.

SECURITY ADVISORY STATUS

F5 Product Development has assigned IDs 1106161 and 1143329 (BIG-IP) to this
vulnerability. This issue has been classified as CWE-77: Improper Neutralization
of Special Elements used in a Command ('Command Injection').

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 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

 * BIG-IP and BIG-IQ
 * F5OS
 * NGINX
 * Other products
 * Services

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.

Product Branch Versions known to be vulnerable1 Fixes introduced in Severity
CVSSv3 score2 Vulnerable component or feature BIG-IP (all modules) 17.x 17.0.0
None3 High 8.7 iControl REST 16.x 16.1.0 - 16.1.3 None3 15.x 15.1.0 - 15.1.8
None3 14.x 14.1.0 - 14.1.5 None3 13.x 13.1.0 - 13.1.5 None BIG-IP SPK All None
Not applicable Not vulnerable None None BIG-IQ Centralized Management All None
Not applicable Not vulnerable None None

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 AskF5, and it is
possible that the document may be removed without our knowledge.

3This issue has been fixed in an engineering hotfix available for supported
versions of BIG-IP. Customers affected by this issue can request a hotfix on the
latest supported versions of BIG-IP from F5 Support.

F5OS

Product Branch Versions known to be vulnerable1 Fixes introduced in Severity
CVSSv3 score2 Vulnerable component or feature F5OS-A All None Not applicable Not
vulnerable None None F5OS-C All None Not applicable Not vulnerable None None

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 AskF5, and it is
possible that the document may be removed without our knowledge.

NGINX

Product Branch Versions known to be vulnerable1 Fixes introduced in Severity
CVSSv3 score2 Vulnerable component or feature NGINX (all products) All None Not
applicable Not vulnerable None None

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 AskF5, and it is
possible that the document may be removed without our knowledge.

Other products

Product Branch Versions known to be vulnerable1 Fixes introduced in Severity
CVSSv3 score2 Vulnerable component or feature Traffix SDC All None Not
applicable Not vulnerable None None

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 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 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

Until you can install a fixed version, you can use the following sections as
temporary mitigations. These mitigations restrict access to iControl REST to
only trusted networks or devices, thereby limiting the attack surface. The
attacker must hold valid credentials to a highly privileged administrative
account. Therefore, restricting access may still leave the device exposed to the
risk of a malicious insider or lateral movement from another compromised device
within the trusted range.

 * Block iControl REST access through the self IP address
 * Block iControl REST access through the management interface

Block iControl REST access through the self IP address

You can block all access to the iControl REST interface of your BIG-IP system
through self IP addresses. To do so, you can change the Port Lockdown setting
to Allow None for each self IP address in the system. If you must open any
ports, you should use the Allow Custom option, taking care to disallow access to
iControl REST. By default, iControl REST listens on TCP port 443. Alternatively,
you can configure a custom port.

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:

 * K17333: Overview of port lockdown behavior (12.x - 17.x)
 * K13092: Overview of securing access to the BIG-IP system
 * K31003634: The Configuration utility of the Single-NIC BIG-IP Virtual Edition
   now defaults to TCP port 8443
 * 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:

 * K13383: Configure CIDR Network Addresses for the BIG-IP packet filter

Block iControl REST access through the management interface

To mitigate this vulnerability for affected F5 products, you should restrict
management access 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:

 * K13092: Overview of securing access to the BIG-IP system
 * K46122561: Restricting access to the management interface using network
   firewall rules 
 * K69354049: Restricting access to the BIG-IP management interface for
   Configuration utility and iControl REST services using iptables

ACKNOWLEDGEMENTS

F5 acknowledges Ron Bowes of Rapid7 for bringing this issue to our attention and
following the highest standards of coordinated disclosure.

SUPPLEMENTAL INFORMATION

 * K41942608: Overview of security advisory articles
 * K4602: Overview of the F5 security vulnerability response policy
 * K4918: Overview of the F5 critical issue hotfix policy
 * K8986: F5 product support policies
 * K9502: BIG-IP hotfix and point release matrix
 * K13123: Managing BIG-IP product hotfixes (11.x - 17.x)
 * K167: Downloading software and firmware from F5
 * K9970: Subscribing to email notifications regarding F5 products
 * K9957: Creating a custom RSS feed to view new and updated documents
 * K44525501: Overview of BIG-IP data plane and control plane

Applies to:

Product: BIG-IQ, BIG-IQ Centralized Management
8.2.0, 8.1.0, 8.0.0, 7.1.0

Product: BIG-IP, BIG-IP AFM, BIG-IP Analytics, BIG-IP APM, BIG-IP ASM, BIG-IP
DNS, BIG-IP FPS, BIG-IP GTM, BIG-IP Link Controller, BIG-IP LTM, BIG-IP PEM,
BIG-IP AAM
17.0.0, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4,
15.1.3, 15.1.2, 15.1.1, 15.1.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0, 13.1.5,
13.1.4, 13.1.3, 13.1.1, 13.1.0

Product: F5OS, F5OS-A, F5OS-C
1.5.0, 1.3.2, 1.3.1, 1.3.0, 1.2.0, 1.1.1, 1.1.0, 1.0.1, 1.0.0

Product: NGINX Products, NGINX Plus, NGINX App Protect WAF, NGINX App Protect
DoS, NGINX Unit, NGINX Ingress Controller, NGINX Instance Manager, NGINX Service
Mesh, NGINX Controller, NGINX API Connectivity Manager
R27, R26, R25, R24, R23, R22, 3.9.1, 3.9.0, 3.8.0, 3.7.0, 3.6.0, 3.5.0, 3.4.0,
3.3.0, 3.22.5, 3.22.4, 3.22.3, 3.22.2, 3.22.1, 3.22.0, 3.21.0, 3.20.1, 3.20.0,
3.2.0, 3.19.4-APIM, 3.19.3-APIM, 3.19.2-APIM, 3.19.1-APIM, 3.19.0-APIM, 3.18.3,
3.18.2, 3.18.1-APIM, 3.18.1, 3.18.0-APIM, 3.18.0, 3.17.0, 3.16.1, 3.15.0,
3.14.0, 3.13.0, 3.12.1, 3.12.0, 3.11.0, 3.10.0, 3.1.0, 3.0.0, 2.5.1, 2.5.0,
2.4.1, 2.4.0, 2.3.1, 2.3.0, 2.2.2, 2.2.1, 2.2.0, 2.1.2, 2.1.1, 2.1.0, 2.0.3,
2.0.2, 2.0.1, 2.0.0, 1.9.1, 1.9.0, 1.6.0, 1.5.0, 1.4.1, 1.4.0, 1.3.1, 1.3.0,
1.28.0, 1.27.0, 1.26.1, 1.26.0, 1.25.0, 1.24.0, 1.23.0, 1.22.0, 1.21.0, 1.20.0,
1.2.0, 1.12.5, 1.12.4, 1.12.3, 1.12.2, 1.12.1, 1.12.0, 1.11.2, 1.11.1, 1.11.0,
1.10.1, 1.10.0, 1.1.1, 1.1.0, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0

Product: 5G Products, BIG-IP SPK
1.6.0, 1.5.0

Product: Traffix SDC
5.2.0, 5.1.0

Product: F5 App Protect, F5 SSL Orchestrator, F5 DDoS Hybrid Defender
17.0.0, 16.1.3, 16.1.1, 16.1.0, 15.1.1, 15.1.0, 14.1.4, 14.1.2, 14.1.0




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