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AUSCERT External Security Bulletin Redistribution
ESB-2021.0663
Linux kernel vulnerability CVE-2017-15121
23 February 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP
Enterprise Manager
BIG-IQ
F5 iWorkflow
Traffic SDC
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-15121
Reference: ESB-2018.1797
ESB-2018.1104
ESB-2018.1090
Original Bulletin:
https://support.f5.com/csp/article/K42142782
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K42142782: Linux kernel vulnerability CVE-2017-15121
Original Publication Date: 19 Jul, 2018
Latest Publication Date: 19 Feb, 2021
Security Advisory Description
A non-privileged user is able to mount a fuse filesystem on RHEL 6 or 7 and
crash a system if an application punches a hole in a file that does not end
aligned to a page boundary. (CVE-2017-15121)
Impact
An attacker can exploit this vulnerability to cause a denial of service (DoS)
on the affected system.
Security Advisory Status
F5 Product Development has assigned IDs 734177 and 734181 (BIG-IP), ID 725898
(BIG-IQ and iWorkflow), ID 734257 (Enterprise Manager), and CPF-24939 and
CPF-24940 (Traffix SDC) to this vulnerability. Additionally, BIG-IP iHealth may
list Heuristic H42142782 on the Diagnostics > Identified > Medium page.
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 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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |14.x |None |14.0.0 | | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|AFM, Analytics, |13.x |13.0.0 - |None | | | |
|APM, ASM, DNS, Edge| |13.1.1 | | | |TMOS |
|Gateway, FPS, GTM, +------+----------+----------+Medium |5.5 |(Linux |
|Link Controller, |12.x |12.1.0 - |12.1.5.3 | | |kernel) |
|PEM, | |12.1.5 | | | | |
|WebAccelerator) +------+----------+----------+ | | |
| |11.x |11.2.1 - |None | | | |
| | |11.6.3 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|ARX |6.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
| | | | | | |TMOS |
|Enterprise Manager |3.x |3.1.1 |None |Medium |5.5 |(Linux |
| | | | | | |kernel) |
+-------------------+------+----------+----------+----------+------+----------+
| |6.x |6.0.0 - |None | | | |
| | |6.1.0 | | | | |
| +------+----------+----------+ | |TMOS |
|BIG-IQ Centralized | |5.0.0 - | |Medium |5.5 |(Linux |
|Management |5.x |5.4.0 |None | | |kernel) |
| | | | | | | |
| +------+----------+----------+ | | |
| |4.x |4.6.0 |None | | | |
+-------------------+------+----------+----------+----------+------+----------+
|BIG-IQ Cloud and | | | | | |TMOS |
|Orchestration |1.x |1.0.0 |None |Medium |5.5 |(Linux |
| | | | | | |kernel) |
+-------------------+------+----------+----------+----------+------+----------+
| | |2.1.0 - | | | |TMOS |
|F5 iWorkflow |2.x |2.3.0 |None |Medium |5.5 |(Linux |
| | | | | | |kernel) |
+-------------------+------+----------+----------+----------+------+----------+
| |5.x |5.0.0 - |None | | |TMOS |
|Traffix SDC | |5.1.0 | |Medium |5.5 |(Linux |
| +------+----------+----------+ | |kernel) |
| |4.x |4.4.0 |None | | | |
+-------------------+------+----------+----------+----------+------+----------+
^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
None
Supplemental Information
o K51812227: Understanding Security Advisory versioning
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 - 15.x)
o K15106: Managing BIG-IQ product hotfixes
o K15113: BIG-IQ hotfix 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
o K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems
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