Title

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

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.

Additional Identifiers

Rule ID: SV-28420r1_rule

Vulnerability ID: V-847

Group Title: GEN005080

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.