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

Determine if TFTPD is running in secure mode. # grep tftp /etc/inet/inetd.conf OR # svccfg -s tftp/udp6 listprop |grep in.tftpd |grep exec If any returned service line does not use the -s parameter to TFTPD, this is a finding. If TFTP is not installed this check is not applicable.

Fix Text

Edit /etc/inet/inetd.conf and add the -s parameter to TFTPD. # inetconv OR Update the SMF entry for the TFTP daemon. # svccfg -s tftp/udp6 setprop inetd_start/exec = "astring:\"/usr/sbin/in.tftpd -s <other TFTPD options>\""

Additional Identifiers

Rule ID: SV-226958r603265_rule

Vulnerability ID: V-226958

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

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