SOL17155 - TMM vulnerability CVE-2015-4638

Vulnerability Recommended Actions

If the previous table lists a version in the Versions known to be not vulnerable column, you can eliminate this vulnerability by upgrading to the listed version. If the listed version is older than the version you are currently running, or if the table does not list any version in the column, then no upgrade candidate currently exists.

Mitigating this vulnerability

To mitigate this vulnerability, you can modify the FastL4 profile and enable the Reassemble IP Fragments option. To enable the Reassemble IP Fragments option using the Traffic Management Shell (tmsh), perform the following steps:

1. Log in to the tmsh utility****by typing the following command:

tmsh
2. To modify the FastL4 profile and enable the Reassemble IP Fragments option, use the following syntax:

modify /ltm profile fastl4 <profile_name> reassemble-fragments enabled

For example, to enable the Reassemble IP Fragments option for the FastL4 profile named MyFastL4, type the following command:

modify /ltm profile fastl4Â MyFastL4 reassemble-fragments enabled
3. To save the configuration, type the following command:

save /sys config

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
• SOL167: Downloading software and firmware from F5
• SOL13123: Managing BIG-IP product hotfixes (11.x - 12.x)