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AUSCERT External Security Bulletin Redistribution
ESB-2020.4379.2
BIG-IP multiple vulnerabilities
21 December 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-27713 CVE-2020-5950 CVE-2020-5949
CVE-2020-5948
Original Bulletin:
https://support.f5.com/csp/article/K20984059
https://support.f5.com/csp/article/K05204103
ttps://support.f5.com/csp/article/K42696541
https://support.f5.com/csp/article/K37960100
Comment: This bulletin contains four (4) F5 Networks security advisories.
Revision History: December 21 2020: Vendor added fixed versions to product table
December 11 2020: Initial Release
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K42696541: F5 TMUI XSS vulnerability CVE-2020-5948
Original Publication Date: 11 Dec, 2020
Latest Publication Date: 21 Dec, 2020
Security Advisory Description
Undisclosed endpoints in iControl REST allow for a reflected XSS attack, which
could lead to a complete compromise of the BIG-IP system if the victim user is
granted the admin role. (CVE-2020-5948)
Impact
An attacker may exploit this vulnerability using a crafted URL to a reflected
cross-site scripting (XSS) in an undisclosed page of the Configuration utility.
Security Advisory Status
F5 Product Development has assigned ID 911761 (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 |15.0.0 - |15.1.1 | | | |
| | |15.1.0 | | | | |
| +------+----------+----------+ | | |
|BIG-IP (LTM, AAM, |14.x |14.1.0 - |14.1.2.8 | | | |
|AFM, Analytics, | |14.1.2 | | | | |
|APM, ASM, DNS, FPS,+------+----------+----------+High |7.5 |iControl |
|GTM, Link |13.x |13.1.0 - |13.1.3.5 | | |REST |
|Controller, PEM) | |13.1.3 | | | | |
| +------+----------+----------+ | | |
| |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, you should 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 K13092:
Overview of securing access to the BIG-IP system.
The trusted users with access to the Configuration utility should take
precaution when selecting hyperlinks from untrusted or unknown sources. The
attack for this vulnerability is most likely to come in the form of a phishing
attack.
Acknowledgements
F5 acknowledges Krzysztof Przybylski for bringing this issue to our attention
and following the highest standards of coordinated disclosure.
Note: This link takes you to a resource outside of AskF5, and it is possible
that the document may be removed without our knowledge.
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 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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