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The TFTP daemon must be configured to vendor specifications, including a dedicated TFTP user account, a non-login shell, such as /bin/false, and a home directory owned by the TFTP user.


Overview

Finding ID Version Rule ID IA Controls Severity
V-849 GEN005120 SV-849r2_rule ECSC-1 Medium
Description
If TFTP has a valid shell, it increases the likelihood of someone logging to the TFTP account and compromising the system.
STIG Date
VMware ESX 3 Server 2016-05-13

Details

Check Text ( C-715r2_chk )
Check the /etc/passwd file to determine if TFTP is configured properly.

Procedure:
# grep tftp /etc/passwd

If a TFTP user account does not exist and TFTP is active, this is a finding.

Check the user shell for the TFTP user. If it is not /bin/false or equivalent, this is a finding.

Check the home directory assigned to the TFTP user. If no home directory is set, or the directory specified is not dedicated to the use of the TFTP service, this is a finding.
Fix Text (F-1003r2_fix)
Create a TFTP user account if none exists.
Assign a non-login shell to the TFTP user account, such as /bin/false.
Assign a home directory to the TFTP user account.