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

The AIX systems access control program must be configured to grant or deny system access to specific hosts.

DISA Rule

SV-215419r508663_rule

Vulnerability Number

V-215419

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

AIX7-00-003124

Severity

CAT II

CCI(s)

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

Weight

10

Fix Recommendation

Edit the "/etc/hosts.allow" and "/etc/hosts.deny" files to configure access restrictions.

Add "ALL: ALL" entry to "/etc/hosts.deny" file.

Check Contents

Check for the existence of the "/etc/hosts.allow" and "/etc/hosts.deny" files using commands:

# ls -la /etc/hosts.allow
-rw-r--r-- 1 root system 11 Jan 28 11:09 /etc/hosts.allow

# ls -la /etc/hosts.deny
-rw-r--r-- 1 root system 0 Jan 28 11:02 /etc/hosts.deny

If either file does not exist, this is a finding.

Check for the presence of a default deny entry using command:

# grep -E "ALL:[[:blank:]]*ALL" /etc/hosts.deny
ALL:ALL

If the "ALL: ALL" entry is not present in the "/etc/hosts.deny" file, any TCP service from a host or network not matching other rules will be allowed access.

If the entry is not in "/etc/hosts.deny", this is a finding.

Vulnerability Number

V-215419

Documentable

False

Rule Version

AIX7-00-003124

Severity Override Guidance

Check for the existence of the "/etc/hosts.allow" and "/etc/hosts.deny" files using commands:

# ls -la /etc/hosts.allow
-rw-r--r-- 1 root system 11 Jan 28 11:09 /etc/hosts.allow

# ls -la /etc/hosts.deny
-rw-r--r-- 1 root system 0 Jan 28 11:02 /etc/hosts.deny

If either file does not exist, this is a finding.

Check for the presence of a default deny entry using command:

# grep -E "ALL:[[:blank:]]*ALL" /etc/hosts.deny
ALL:ALL

If the "ALL: ALL" entry is not present in the "/etc/hosts.deny" file, any TCP service from a host or network not matching other rules will be allowed access.

If the entry is not in "/etc/hosts.deny", this is a finding.

Check Content Reference

M

Target Key

4012

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