Check: TSS0-ES-000980
IBM z/OS TSS STIG:
TSS0-ES-000980
(in versions v8 r13 through v7 r1)
Title
The CA-TSS PTHRESH Control Option must be properly set. (Cat II impact)
Discussion
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account.
Check Content
From the ISPF Command Shell enter: TSS MODIFY STATUS If the PTHRESH Control Option value is not set to "PTHRESH(2)", this is a finding.
Fix Text
Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change. PTHRESH(2)
Additional Identifiers
Rule ID: SV-223971r877812_rule
Vulnerability ID: V-223971
Group Title: SRG-OS-000329-GPOS-00128
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-002238 |
The information system automatically locks the account or node for either an organization-defined time period, until the locked account or node is released by an administrator, or delays the next logon prompt according to the organization-defined delay algorithm when the maximum number of unsuccessful logon attempts is exceeded. |
Controls
| Number | Title |
|---|---|
| AC-7 |
Unsuccessful Logon Attempts |