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NFS file systems on AIX must be mounted with the nosuid option unless the NFS file systems contain approved setuid or setgid programs.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-215234AIX7-00-001138SV-215234r1184573_ruleCCI-002233medium
Description
The nosuid mount option causes the system to not execute setuid files with owner privileges. This option must be used for mounting any file system not containing approved setuid files. Executing setuid files from untrusted file systems, or file systems not containing approved setuid files, increases the opportunity for unprivileged users to attain unauthorized administrative access.
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-21.7Privilege Levels for Code Execution
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (17) 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-3Access Enforcement
1.00
AC-3(4)Discretionary Access Control
1.00
AC-6(10)Prohibit Non-privileged Users from Executing Privileged Functions
1.00
AC-6(8)Privilege Levels for Code Execution
1.00
AC-6(9)Log Use of Privileged Functions
1.00
AU-3(1)Additional Audit Information
1.00
CM-5(6)Limit Library Privileges
1.00
CM-7Least Functionality
1.00
CM-7(2)Prevent Program Execution
1.00
CM-7(5)Authorized Software — Allow-by-exception
1.00

+7 more (top 10 by confidence shown)

CCI1 mapping
CCI-002233
1.00

Details

Check Text (C-215234r1184573_chk)

Obtain a list of NFS file systems that contain approved "setuid" or "setgid" files from the information system security officer (ISSO)/information system security officer (ISSM). Check the "nosuid" mount option is used on all NFS file systems that do not contain approved "setuid" or "setgid" files: # mount | grep -E "options|nfs|---" node mounted mounted over vfs date options -------- --------------- --------------- ------ ------------ --------------- nfs.example.com /path/to/directory1 /mnt_1 nfs3 Nov 05 14:11 ro,bg,hard,intr,nosuid,sec=sys nfs.example.com /path/to/directory2 /mnt_2 nfs3 Nov 05 14:12 ro,bg,hard,intr,sec=sys If the NFS mounts do not show the "nosuid" setting in their "options" fields, along with other mount options, this is a finding.

Fix Text (F-16430r294154_fix)

For each NFS file systems that does not contain approved "setuid" or "setgid" files, add the "nosuid" option, along with other mount options, to the "options" field in "/etc/filesystems" using the following command: # chfs -a options=ro,bg,hard,intr,nosuid,sec=sys <NFS_mount_point> Note that the other mount options (other than the nosuid options) may be different among NFS mounts.