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AUSCERT External Security Bulletin Redistribution
ESB-2021.2115
Linux kernel vulnerability CVE-2019-11599
14 June 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP
Enterprise Manager
BIG-IQ Centralized Manager
F5 iWorkflow
Traffic SDC
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11599
Reference: ASB-2020.0033
ESB-2020.0549
ESB-2019.3612
ESB-2019.3335
Original Bulletin:
https://support.f5.com/csp/article/K51674118
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K51674118: Linux kernel vulnerability CVE-2019-11599
Original Publication Date: 16 Jul, 2019
Latest Publication Date: 09 Jun, 2021
Security Advisory Description
The coredump implementation in the Linux kernel before 5.0.10 does not use
locking or other mechanisms to prevent vma layout or vma flags changes while it
runs, which allows local users to obtain sensitive information, cause a denial
of service, or possibly have unspecified other impact by triggering a race
condition with mmget_not_zero or get_task_mm calls. This is related to fs/
userfaultfd.c, mm/mmap.c, fs/proc/task_mmu.c, and drivers/infiniband/core/
uverbs_main.c. (CVE-2019-11599)
Impact
A locally authenticated attacker can discover sensitive information, cause a
denial of service (DoS), or impact the system in another way by triggering a
race condition with the vulnerable component.
Security Advisory Status
F5 Product Development has assigned ID 797769 (BIG-IP), ID 797769-6 (BIG-IQ),
ID 7797769-7 (Enterprise Manager), ID 7797769-8 (F5 iWorkflow), and CPF-25100
and CPF-25101 (Traffix) to this vulnerability. Additionally, BIG-IP iHealth may
list Heuristic H51674118 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| | | | |
+---------------------+------+----------+----------+--------+------+----------+
| |16.x |16.0.0 - |None | | | |
| | |16.0.1 | | | | |
| +------+----------+----------+ | | |
| |15.x |15.0.0 - |None | | | |
| | |15.1.3 | | | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|AFM, Analytics, APM, |14.x |14.0.0 - |14.1.4.3 | | | |
|ASM, DNS, Edge | |14.1.4 | | | |Linux |
|Gateway, FPS, GTM, +------+----------+----------+Medium |5.1 |kernel |
|Link Controller, PEM,|13.x |13.1.0 - |13.1.4.1 | | | |
|WebAccelerator) | |13.1.4 | | | | |
| +------+----------+----------+ | | |
| |12.x |12.1.0 - |Will not | | | |
| | |12.1.6 |fix | | | |
| +------+----------+----------+ | | |
| |11.x |11.5.2 - |Will not | | | |
| | |11.6.5 |fix | | | |
+---------------------+------+----------+----------+--------+------+----------+
|Enterprise Manager |3.x |3.1.1 |None |Medium |5.1 |Linux |
| | | | | | |kernel |
+---------------------+------+----------+----------+--------+------+----------+
| |6.x |6.0.0 - |None | | | |
|BIG-IQ Centralized | |6.1.0 | | | |Linux |
|Management +------+----------+----------+Medium |5.1 |kernel |
| |5.x |5.1.0 - |None | | | |
| | |5.4.0 | | | | |
+---------------------+------+----------+----------+--------+------+----------+
|F5 iWorkflow |2.x |2.3.0 |None |Medium |5.1 |Linux |
| | | | | | |kernel |
+---------------------+------+----------+----------+--------+------+----------+
|Traffix SDC |5.x |5.0.0 - |None |Medium |5.1 |Linux |
| | |5.1.0 | | | |kernel |
+---------------------+------+----------+----------+--------+------+----------+
^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.
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 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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