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AIX /etc/security/mkuser.sys.custom file must not exist unless it is needed for customizing a new user account.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-215169AIX7-00-001000SV-215169r958362_ruleCCI-000015medium
Description
The "/etc/security/mkuser.sys.custom" is called by "/etc/security/mkuser.sys" to customize the new user account when a new user is created, or a user is logging into the system without a home directory. An improper "/etc/security/mkuser.sys.custom" script increases the risk that non-privileged users may obtain elevated privileges. It must not exist unless it is needed.
STIGDate
IBM AIX 7.x Security Technical Implementation Guide2026-06-15

Related Frameworks

1 mapping across 3 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

IAC-15.1Automated System Account Management (Directory Services)
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (72) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-10Concurrent Session Control
1.00
AC-12Session Termination
1.00
AC-17(1)Monitoring and Control
1.00
AC-17(10)Authenticate Remote Commands
1.00
AC-17(9)Disconnect or Disable Access
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(10)Shared and Group Account Credential Change
1.00
AC-2(11)Usage Conditions
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00

+62 more (top 10 by confidence shown)

CCI1 mapping
CCI-000015
1.00

Details

Check Text (C-215169r958362_chk)

Check if the "/etc/security/mkuser.sys.custom" file exists: # ls /etc/security/mkuser.sys.custom If the above command shows the file exists, this is a finding.

Fix Text (F-16365r293959_fix)

Remove the "/etc/security/mkuser.sys.custom" file using the following command: # rm /etc/security/mkuser.sys.custom