The TFTP daemon must operate in "secure mode" which provides access only to a single directory on the host file system.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-28420r1_rule The TFTP daemon must operate in "secure mode" which provides access only to a single directory on the host file system.

Vulnerability discussion

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.

Check content

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

Edit /etc/tftpaccess.ctl to only contain an entry restricting access to the tftp user home directory.

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