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AUSCERT External Security Bulletin Redistribution
ESB-2015.2633
sol17447: Linux kernel UDF vulnerabilities CVE-2014-9728,
CVE-2014-9729, and CVE-2014-9730
19 October 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2014-9730 CVE-2014-9729 CVE-2014-9728
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/17000/400/sol17447.html
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sol17447: Linux kernel UDF vulnerabilities CVE-2014-9728, CVE-2014-9729,
and CVE-2014-9730
Security Advisory
Original Publication Date: 10/16/2015
Updated Date: 10/16/2015
Description
CVE-2014-9728
The UDF filesystem implementation in the Linux kernel before 3.18.2
does not validate certain lengths, which allows local users to cause
a denial of service (buffer over-read and system crash) via a crafted
filesystem image, related to fs/udf/inode.c and fs/udf/symlink.c.
CVE-2014-9729
The udf_read_inode function in fs/udf/inode.c in the Linux kernel before
3.18.2 does not ensure a certain data-structure size consistency,
which allows local users to cause a denial of service (system crash)
via a crafted UDF filesystem image.
CVE-2014-9730
The udf_pc_to_char function in fs/udf/symlink.c in the Linux kernel
before 3.18.2 relies on component lengths that are unused, which allows
local users to cause a denial of service (system crash) via a crafted
UDF filesystem image.
Impact
An authenticated attacker must have the capability to load the vulnerable
UDF kernel module and mount a crafted UDF filesystem image in order to cause
a denial-of-service on the affected F5 products. By default, the vulnerable
UDF kernel module is not loaded and not used by the affected F5 products.
Status
F5 Product Development has assigned ID 551463, 551461, 551462 (BIG-IP), ID
551600 (BIG-IQ) and ID 551602 (Enterprise Manager) to this vulnerability, and
has evaluated the currently supported releases for potential vulnerability.
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:
Product Versions known to be vulnerable Versions known to be not vulnerable Severity Vulnerable component or feature
BIG-IP LTM 12.0.0 None Low Linux kernel
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP AAM 12.0.0 None Low Linux kernel
11.4.0 - 11.6.0
BIG-IP AFM 12.0.0 None Low Linux kernel
11.3.0 - 11.6.0
BIG-IP 12.0.0 None
Analytics 11.0.0 - 11.6.0
BIG-IP APM 12.0.0 None Low Linux kernel
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP ASM 12.0.0 None Low Linux kernel
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP DNS 12.0.0 None Low Linux kernel
BIG-IP Edge 11.0.0 - 11.3.0 None Low Linux kernel
Gateway 10.1.0 - 10.2.4
BIG-IP GTM 11.0.0 - 11.6.0 None Low Linux kernel
10.1.0 - 10.2.4
BIG-IP Link 12.0.0 None Low Linux kernel
Controller 11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP PEM 12.0.0 None Low Linux kernel
11.3.0 - 11.6.0
BIG-IP PSM 11.0.0 - 11.4.1 None Low Linux kernel
10.1.0 - 10.2.4
BIG-IP 11.0.0 - 11.3.0 None Low Linux kernel
WebAccelerator 10.1.0 - 10.2.4
BIG-IP WOM 11.0.0 - 11.3.0 None Low Linux kernel
10.1.0 - 10.2.4
ARX None 6.0.0 - 6.4.0 Not vulnerable None
Enterprise 3.0.0 - 3.1.1 None Low Linux kernel
Manager
FirePass None 7.0.0 Not vulnerable None
6.0.0 - 6.1.0
BIG-IQ Cloud 4.0.0 - 4.5.0 None Low Linux kernel
BIG-IQ Device 4.2.0 - 4.5.0 None Low Linux kernel
BIG-IQ Security 4.0.0 - 4.5.0 None Low Linux kernel
BIG-IQ ADC 4.5.0 None Low Linux kernel
LineRate None 2.5.0 - 2.6.1 Not vulnerable None
F5 WebSafe None 1.0.0 Not vulnerable None
Traffix SDC None 4.0.0 - 4.4.0 Not vulnerable None
3.3.2 - 3.5.1
Recommended Action
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 Versions known to be not vulnerable 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.
F5 responds to vulnerabilities in accordance with the Severity values
published in the previous table. The Severity values and other security
vulnerability parameters are defined in SOL4602: Overview of the F5 security
vulnerability response policy.
Mitigating the vulnerability
To mitigate this vulnerability for affected F5 products, you should only
permit management access to F5 products over a secure network and limit
shell access to trusted users. For more information about securing access to
BIG-IP/Enterprise Manager systems, refer to SOL13309: Restricting access to
the Configuration utility by source IP address (11.x - 12.x) and SOL13092:
Overview of securing access to the BIG-IP system.
Determining vulnerability exposure on your system
By default, the vulnerable UDF kernel module is not loaded and not used
by the affected F5 products. However, you can determine if your system is
exposed to this vulnerability by verifying whether the UDF kernel module
is loaded. To do so, perform the following procedure:
Impact of procedure: Performing the following procedure should not have
a negative impact on your system.
Log in to the command line.
Verify if the UDF kernel module is loaded by typing the following
command:
lsmod | grep -i udf
If the command returns no output, the UDF kernel module is not loaded
on the system and the system is not exposed to this vulnerability. The
UDF kernel module is loaded on the system and the system is exposed
to this vulnerability if the command output appears similar to the
following example:
udf 66451 0
crc_itu_t 1669 1 udf
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents
SOL4602: Overview of the F5 security vulnerability response policy
SOL4918: Overview of the F5 critical issue hotfix policy
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