STIGQter: STIG Summary: IBM AIX 7.x Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

AIX must define default permissions for all authenticated users in such a way that the user can only read and modify their own files.

DISA Rule

SV-215431r508663_rule

Vulnerability Number

V-215431

Group Title

SRG-OS-000480-GPOS-00228

Rule Version

AIX7-00-003137

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Add the following line to "/etc/security/.profile":
umask 077

Run the following command to set "umask=077" for the default stanza in "/etc/security/user":
# chsec -f /etc/security/user -s default -a umask=077

Check Contents

Check if "/etc/security/.profile" contains the proper "umask" setting by running the following command:
# grep "umask 077" /etc/security/.profile
umask 077

If the above command does not output the "umask 077", this is a finding.

From the command prompt, run the following command to check if "umask=077" for the default stanza in "/etc/security/user":
# lssec -f /etc/security/user -s default -a umask
default umask=077

If the "umask" for the default stanza is not "077", or the "umask" is not set, this is a finding.

Vulnerability Number

V-215431

Documentable

False

Rule Version

AIX7-00-003137

Severity Override Guidance

Check if "/etc/security/.profile" contains the proper "umask" setting by running the following command:
# grep "umask 077" /etc/security/.profile
umask 077

If the above command does not output the "umask 077", this is a finding.

From the command prompt, run the following command to check if "umask=077" for the default stanza in "/etc/security/user":
# lssec -f /etc/security/user -s default -a umask
default umask=077

If the "umask" for the default stanza is not "077", or the "umask" is not set, this is a finding.

Check Content Reference

M

Target Key

4012

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