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The TFTP daemon must operate in secure mode which provides access only to a single directory on the host file system.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-38701 | RHEL-06-000338 | SV-50502r1_rule | High |
| Description |
|---|
| Using the "-s" option causes the TFTP service to only serve files from the given directory. Serving files from an intentionally specified directory reduces the risk of sharing files which should remain private. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 6 Security Technical Implementation Guide | 2017-04-28 |
Details
| Check Text ( None ) |
|---|
| None |
| Fix Text (F-43650r1_fix) |
|---|
| If running the "tftp" service is necessary, it should be configured to change its root directory at startup. To do so, ensure "/etc/xinetd.d/tftp" includes "-s" as a command line argument, as shown in the following example (which is also the default): server_args = -s /var/lib/tftpboot |