SOL17447 - Linux kernel UDF vulnerabilities CVE-2014-9728, CVE-2014-9729, and CVE-2014-9730

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 theVersions 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.

1. Log in to the command line.
2. 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