Check: TSS0-ES-000140
IBM z/OS TSS STIG:
TSS0-ES-000140
(in versions v9 r2 through v7 r1)
Title
IBM z/OS must use NIST FIPS-validated cryptography to protect passwords in the security database. (Cat I impact)
Discussion
Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000074-GPOS-00042
Check Content
From the ISPF command shell line enter: TSS MODIFY(STATUS) If either of the following is included, this is not a finding. AES_ENCRYPTION(Active,128) AES_ENCRYPTION(Active,256)
Fix Text
Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option as specified below: Convert passwords/password phrases from Triple-DES encryption to 128-bit AES or 256-bit encryption by running TSSMAINT (with the AESENCRYPT option specified) and then running TSSXTEND to copy the old security file to the new security file. Please consult CA-TSS Installation guide for more information.
Additional Identifiers
Rule ID: SV-223887r998488_rule
Vulnerability ID: V-223887
Group Title: SRG-OS-000073-GPOS-00041
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000196 |
The information system, for password-based authentication, stores only cryptographically-protected passwords. |
| CCI-000197 |
For password-based authentication, transmit passwords only over cryptographically-protected channels. |
| CCI-004062 |
For password-based authentication, store passwords using an approved salted key derivation function, preferably using a keyed hash. |
Controls
| Number | Title |
|---|---|
| IA-5(1) |
Password-based Authentication |