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AUSCERT External Security Bulletin Redistribution
ESB-2020.0317
Linux kernel vulnerability CVE-2019-19069
29 January 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Traffix SDC
Publisher: F5 Networks
Operating System: Network Appliance
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: None
CVE Names: CVE-2019-19069 CVE-2019-18276
Reference: ESB-2019.4537
Original Bulletin:
https://support.f5.com/csp/article/K60130614
https://support.f5.com/csp/article/K86221000
Comment: This advisory references vulnerabilities in bash that
also affect distributions other than F5 Networks. It is recommended
that administrators running Linux check for an updated version of
the kernel for their system.
This bulletin contains two (2) F5 Networks security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
K60130614:Linux kernel vulnerability CVE-2019-19069
Security Advisory
Original Publication Date: 28 Jan, 2020
Security Advisory Description
A memory leak in the fastrpc_dma_buf_attach() function in drivers/misc/
fastrpc.c in the Linux kernel before 5.3.9 allows attackers to cause a denial
of service (memory consumption) by triggering dma_get_sgtable() failures, aka
CID-fc739a058d99. (CVE-2019-19069)
Impact
An attacker may be able to cause a denial-of-service (DoS) attack through
excessive memory consumption.
Security Advisory Status
F5 Product Development has assigned CPF-25165 (Traffix) 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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |15.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |14.x |None |Not | | | |
|BIG-IP (LTM, AAM, | | |applicable| | | |
|AFM, Analytics, +------+----------+----------+ | | |
|APM, ASM, DNS, FPS,|13.x |None |Not |Not |None |None |
|GTM, Link | | |applicable|vulnerable| | |
|Controller, PEM) +------+----------+----------+ | | |
| |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
| |7.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
|BIG-IQ Centralized |6.x |None |Not |Not |None |None |
|Management | | |applicable|vulnerable| | |
| +------+----------+----------+ | | |
| |5.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
| | |5.0.0 - | | | |Linux |
|Traffix SDC |5.x |5.1.0 |None |High |7.5 |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.
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 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
- --------------------------------------------------------------------------------
K86221000:Bash vulnerability CVE-2019-18276
Security Advisory
Original Publication Date: 28 Jan, 2020
Security Advisory Description
An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0
patch 11. By default, if Bash is run with its effective UID not equal to its
real UID, it will drop privileges by setting its effective UID to its real UID.
However, it does so incorrectly. On Linux and other systems that support "saved
UID" functionality, the saved UID is not dropped. An attacker with command
execution in the shell can use "enable -f" for runtime loading of a new
builtin, which can be a shared object that calls setuid() and therefore regains
privileges. However, binaries running with an effective UID of 0 are
unaffected. (CVE-2019-18276)
Impact
An attacker can load a new builtin command, which can be a shared object that
calls setuid() and therefore regains privileges.
Security Advisory Status
F5 Product Development has assigned CPF-25161 (Traffix) 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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |15.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |14.x |None |Not | | | |
|BIG-IP (LTM, AAM, | | |applicable| | | |
|AFM, Analytics, +------+----------+----------+ | | |
|APM, ASM, DNS, FPS,|13.x |None |Not |Not |None |None |
|GTM, Link | | |applicable|vulnerable| | |
|Controller, PEM) +------+----------+----------+ | | |
| |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
| |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 |5.0.0 - |None |High |7.8 |bash |
| | |5.1.0 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
^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 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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