The TFTP Server program is not properly protected.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-3241	IFTP0090	SV-3241r2_rule	DCCS-1 DCCS-2	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 ACF2 STIG	2019-12-12

Details

Check Text ( C-19587r1_chk )
a) Refer to the following report produced by the ACF2 Data Collection and Data Set and Resource Data Collection: - ACF2CMDS.RPT(ACFGSO) - 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) Programs TFTPD and EZATD are defined in the GSO PPGM record. 2) Program resources TFTPD and EZATD are defined in the PROGRAM resource class. 3) No access to the program resources TFTPD and EZATD is permitted. c) If all items in (b) are true, there is NO FINDING. d) If any item (b) is untrue, this is a FINDING.

Check Text ( C-19587r1_chk )

a) Refer to the following report produced by the ACF2 Data Collection and Data Set and Resource Data Collection:

- ACF2CMDS.RPT(ACFGSO)
- 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) Programs TFTPD and EZATD are defined in the GSO PPGM record.
2) Program resources TFTPD and EZATD are defined in the PROGRAM resource class.
3) No access to the program resources TFTPD and EZATD is permitted.

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

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

Fix Text (F-17979r1_fix)
The IAO will ensure that the resource controls for the TFTP Server programs TFTPD and EZATD and ensure all access is restricted. Evaluate the impact of implementing the following change. Develop a plan of action and implement the change as required. 1) Ensure that the resource controls for the TFTP Server programs TFTPD and EZATD and ensure all access is restricted. Examples: SET CONTROL(GSO) CHANGE PPGM PGM-MASK(TFTPD EZATD) ADD F ACF2,REFRESH(PPGM) $KEY(TFTPD) TYPE(PGM) UID() PREVENT SET R(PGM) COMPILE 'ACF2.MVA.PGM(TFTPD)' STORE F ACF2,REBUILD(PGM) $KEY(EZATD) TYPE(PGM) UID() PREVENT SET R(PGM) COMPILE 'ACF2.MVA.PGM(EZATD)' STORE F ACF2,REBUILD(PGM)

Fix Text (F-17979r1_fix)

The IAO will ensure that the resource controls for the TFTP Server programs TFTPD and EZATD and ensure all access is restricted.

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

1) Ensure that the resource controls for the TFTP Server programs TFTPD and EZATD and ensure all access is restricted.

Examples:

SET CONTROL(GSO)
CHANGE PPGM PGM-MASK(TFTPD EZATD) ADD

F ACF2,REFRESH(PPGM)

$KEY(TFTPD) TYPE(PGM)
UID(*) PREVENT

SET R(PGM)
COMPILE 'ACF2.MVA.PGM(TFTPD)' STORE

F ACF2,REBUILD(PGM)

$KEY(EZATD) TYPE(PGM)
UID(*) PREVENT

SET R(PGM)
COMPILE 'ACF2.MVA.PGM(EZATD)' STORE

F ACF2,REBUILD(PGM)