The TFTP Server program is not properly protected.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-3241	IFTP0090	SV-6924r2_rule		Medium

Description
The Trivial File Transfer Protocol (TFTP) Server, known as tftpd, supports file transfer according to the industry standard Trivial File Transfer Protocol. The TFTP Server does not perform any user identification or authentication, allowing any client to connect to the TFTP Server. Due to this lack of security, the TFTP Server will not be used. Failure to restrict the use of the TFTP Server may result in unauthorized access to the host. This exposure may impact the integrity, availability, and privacy of application data.

Description

The Trivial File Transfer Protocol (TFTP) Server, known as tftpd, supports file transfer according to the industry standard Trivial File Transfer Protocol. The TFTP Server does not perform any user identification or authentication, allowing any client to connect to the TFTP Server. Due to this lack of security, the TFTP Server will not be used. Failure to restrict the use of the TFTP Server may result in unauthorized access to the host. This exposure may impact the integrity, availability, and privacy of application data.

STIG	Date
z/OS RACF STIG	2019-12-12

Details

Check Text ( C-20528r1_chk )
a) Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(PROGRAM) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(IFTP0090) b) Ensure the following program controls are in effect for the TFTP Server: 1) Program resources TFTPD and EZATD are defined to the PROGRAM resource class with a UACC(NONE). The library name where these programs are located is SYS1.TCPIP.SEZALOAD. 2) No access to the program resources TFTPD and EZATD is permitted. c) If both the items in (b) are true, there is NO FINDING. d) If any item in (b) is untrue, this is a FINDING.

Check Text ( C-20528r1_chk )

a) Refer to the following report produced by the Data Set and Resource Data Collection:

- SENSITVE.RPT(PROGRAM)

Automated Analysis
Refer to the following report produced by the Data Set and Resource Data Collection:

- PDI(IFTP0090)

b) Ensure the following program controls are in effect for the TFTP Server:

1) Program resources TFTPD and EZATD are defined to the PROGRAM resource class with a UACC(NONE). The library name where these programs are located is SYS1.TCPIP.SEZALOAD.
2) No access to the program resources TFTPD and EZATD is permitted.

c) If both the items in (b) are true, there is NO FINDING.

d) If any item in (b) is untrue, this is a FINDING.

Fix Text (F-18461r1_fix)
Evaluate the impact of implementing the following change. Develop a plan of action and implement the change as required. 1) Ensure that the EZATD program and its alias TFTPD are defined to RACF, no access is granted, and WARN mode is not enabled. The following commands provide a sample of how this can be accomplished. rdef program tftpd addmem('sys1.tcpip.sezaload'//nopadchk) - data('Reference SRR PDI # IFTP0090') - audit(all(read)) uacc(none) owner(admin) rdef program ezatd - addmem('sys1.tcpip.sezaload'//nopadchk) - data('Reference SRR PDI # IFTP0090') - audit(all(read)) uacc(none) owner(admin) A PROGRAM class refresh will be necessary and can be accomplished with the command: setr when(program) refresh

Fix Text (F-18461r1_fix)

Evaluate the impact of implementing the following change. Develop a plan of action and implement the change as required.

1) Ensure that the EZATD program and its alias TFTPD are defined to RACF, no access is granted, and WARN mode is not enabled. The following commands provide a sample of how this can be accomplished.

rdef program tftpd addmem('sys1.tcpip.sezaload'//nopadchk) -
data('Reference SRR PDI # IFTP0090') -
audit(all(read)) uacc(none) owner(admin)

rdef program ezatd -
addmem('sys1.tcpip.sezaload'//nopadchk) -
data('Reference SRR PDI # IFTP0090') -
audit(all(read)) uacc(none) owner(admin)

A PROGRAM class refresh will be necessary and can be accomplished with the command:

setr when(program) refresh