The IBM Aspera High-Speed Transfer Server must restrict Aspera transfer users to a limited part of the server's file system.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-252641	ASP4-TS-020250	SV-252641r818093_rule		Medium

Description
By restricting the transfer users to a limited part of the server's file system, this prevents unauthorized data transfers. By default, all system users can establish a FASP connection and are only restricted by file permissions.

STIG	Date
IBM Aspera Platform 4.2 Security Technical Implementation Guide	2022-08-24

Details

Check Text ( C-56097r818091_chk )

Verify the Aspera High-Speed Transfer Server restricts Aspera transfer users to a limited part of the server's file system. Check that each user is restricted to a specific transfer folder with the following command: Warning: If an invalid user/group name is entered, the asuserdata command will return results that may appear accurate. Ensure that the user/group name is valid and entered into the command correctly. $ sudo /opt/aspera/bin/asuserdata -u | grep absolute canonical_absolute: "" absolute: "" If the transfer user's docroot is set to "" or is blank, this is a finding.

Fix Text (F-56047r818092_fix)
Configure the Aspera High-Speed Transfer Server to restrict Aspera transfer users to a limited part of the server's file system with the following command: $ sudo /opt/aspera/bin/asconfigurator -x "set_user_data; user_name, ;canonical_absolute,; absolute," Restart the IBM Aspera Node service to activate the changes. $ sudo systemctl restart asperanoded.service