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AUSCERT External Security Bulletin Redistribution
ESB-2021.0514
iControl REST vulnerability CVE-2021-22978
11 February 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP (iControl REST) Products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Cross-site Scripting -- Remote with User Interaction
Modify Arbitrary Files -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-22978 CVE-2021-22974 CVE-2017-6167
Original Bulletin:
https://support.f5.com/csp/article/K87502622
https://support.f5.com/csp/article/K68652018
Comment: This bulletin contains two (2) F5 Networks security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
K87502622: iControl REST vulnerability CVE-2021-22978
Original Publication Date: 11 Feb, 2021
Security Advisory Description
Undisclosed endpoints in iControl REST allow for a reflected XSS attack, which
could lead to a complete compromise of BIG-IP if the victim user is granted the
admin role. (CVE-2021-22978)
Impact
An attacker may exploit this vulnerability using a crafted URL to a reflected
cross-site scripting (XSS) attack in an undisclosed page of the Configuration
utility. This vulnerability is most likely to take the form of a phishing
attack.
Security Advisory Status
F5 Product Development has assigned ID 932065 (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 | | | |
| +------+----------+----------+ | | |
| |15.x |15.1.0 |15.1.1 | | | |
| +------+----------+----------+ | | |
|BIG-IP (LTM, AAM, |14.x |14.1.0 - |14.1.3.1 | | | |
|Advanced WAF, AFM, | |14.1.3 | | | | |
|Analytics, APM, +------+----------+----------+ | |iControl |
|ASM, DDHD, DNS, |13.x |13.1.0 - |13.1.3.5 |High |7.5 |REST |
|FPS, GTM, Link | |13.1.3 | | | | |
|Controller, PEM, +------+----------+----------+ | | |
|SSLO) |12.x |12.1.0 - |None | | | |
| | |12.1.5 | | | | |
| +------+----------+----------+ | | |
| |11.x |11.6.1 - |None | | | |
| | |11.6.5 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |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
To mitigate this vulnerability, permit management access to F5 products only
over a secure network, and limit access to only trusted users. For more
information about securing access to BIG-IP systems, refer to K13309:
Restricting access to the Configuration utility by source IP address (11.x -
15.x) and K13092: Overview of securing access to the BIG-IP system.
Additionally, trusted users with access to the Configuration utility must be
cautious when selecting hyperlinks from untrusted or unknown sources.
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 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
- ----------------------------------------------------------------------------------------------------
K68652018: iControl REST vulnerability CVE-2021-22974
Original Publication Date: 11 Feb, 2021
Security Advisory Description
An authenticated attacker with access to iControl REST over the control plane
may be able to take advantage of a race condition to execute commands with an
elevated privilege level. This vulnerability is due to an incomplete fix for
CVE-2017-6167. (CVE-2021-22974).
Impact
An attacker can exploit the vulnerability to obtain restricted information,
modify files, or cause a denial-of-service (DoS).
Security Advisory Status
F5 Product Development has assigned ID 916821 (BIG-IP) and ID 933501 (BIG-IQ)
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 |15.1.0 - |15.1.2 | | | |
| | |15.1.1 | | | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|Advanced WAF, AFM, |14.x |14.1.0 - |14.1.3.1 | | | |
|Analytics, APM, | |14.1.3 | | | |iControl |
|ASM, DDHD, DNS, +------+----------+----------+High |7.5 |REST API |
|FPS, GTM, Link |13.x |13.1.0 - |13.1.3.6 | | | |
|Controller, PEM, | |13.1.3 | | | | |
|SSLO) +------+----------+----------+ | | |
| |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
| |7.x |7.0.0 - |None | | | |
|BIG-IQ Centralized | |7.1.0 | | | |iControl |
|Management +------+----------+----------+High |7.5 |REST API |
| |6.x |6.0.0 - |None | | | |
| | |6.1.0 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|F5OS |1.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
|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
To mitigate this vulnerability, you should permit management access to F5
products only over a secure network and restrict access for affected systems to
only trusted users.
For more information about this mitigation, which is applicable to the BIG-IP
system, refer to K13092: Overview of securing access to the BIG-IP system.
For more information about iControl REST access, refer to K84925527: Overview
of iControl permissions.
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 K15113: BIG-IQ hotfix and point release matrix
o K15106: Managing BIG-IQ product hotfixes
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--------------------
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