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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-847 | GEN005080 | SV-28420r1_rule | ECSC-1 | High |
| Description |
|---|
| Secure mode limits TFTP requests to a specific directory. If TFTP is not running in secure mode, it may be able to write to any file or directory and may seriously impair system integrity, confidentiality, and availability. |
| STIG | Date |
|---|---|
| AIX 5.3 Security Technical Implementation Guide | 2012-05-25 |
Details
| Check Text ( C-28685r2_chk ) |
|---|
| If the system is not running tftp, this is not applicable. Determine if tftpd is running in secure mode. # more /etc/tftpaccess.ctl If the file does not exist, this is a finding. If the file does not contain an entry restricting access to the tftp user home directory, this is a finding. If other configuration is in the file, this is a finding. |
| Fix Text (F-25711r1_fix) |
|---|
| Edit /etc/tftpaccess.ctl to only contain an entry restricting access to the tftp user home directory. |