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IBM AIX 7.x Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The AIX root accounts home directory (other than /) must have mode 0700.

    <VulnDiscussion>Users' home directories/folders may contain information of a sensitive nature. Non-privileged users should coordinate any sha...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00230

    <GroupDescription></GroupDescription>
    Group
    Show

  • The AIX root accounts home directory must not have an extended ACL.

    &lt;VulnDiscussion&gt;Excessive permissions on root home directories allow unauthorized access to root user files.&lt;/VulnDiscussion&gt;&lt;FalseP...
    Rule Medium Severity
    Show

  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    Group
    Show

  • Audit logs on the AIX system must be owned by root.

    &lt;VulnDiscussion&gt;Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confide...
    Rule Medium Severity
    Show

  • SRG-OS-000057-GPOS-00027

    <GroupDescription></GroupDescription>
    Group
    Show

  • Audit logs on the AIX system must be group-owned by system.

    &lt;VulnDiscussion&gt;Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confide...
    Rule Medium Severity
    Show

  • SRG-OS-000057-GPOS-00027

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-OS-000269-GPOS-00103

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • If LDAP authentication is required, AIX must setup LDAP client to refresh user and group caches less than a day.

    &lt;VulnDiscussion&gt;If cached authentication information is out-of-date, the validity of the authentication information may be questionable.&lt;/...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must require passwords to contain no more than three consecutive repeating characters.

    &lt;VulnDiscussion&gt;Passwords with excessive repeating characters may be more vulnerable to password-guessing attacks.&lt;/VulnDiscussion&gt;&lt;...
    Rule Medium Severity
    Show

  • SRG-OS-000297-GPOS-00115

    <GroupDescription></GroupDescription>
    Group
    Show

  • The AIX /etc/group file must not have an extended ACL.

    &lt;VulnDiscussion&gt;The "/etc/group" file contains information regarding groups that are configured on the system. Protection of this file is imp...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX SSH daemon must perform strict mode checking of home directory configuration files.

    &lt;VulnDiscussion&gt;If other users have access to modify user-specific SSH configuration files, they may be able to log into the system as anothe...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must turn off X11 forwarding for the SSH daemon.

    &lt;VulnDiscussion&gt;X11 forwarding over SSH allows for the secure remote execution of X11-based applications. This feature can increase the attac...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX sendmail logging must not be set to less than nine in the sendmail.cf file.

    &lt;VulnDiscussion&gt;If Sendmail is not configured to log at level 9, system logs may not contain the information necessary for tracking unauthori...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must not respond to ICMPv6 echo requests sent to a broadcast address.

    &lt;VulnDiscussion&gt;Responding to broadcast ICMP echo requests facilitates network mapping and provides a vector for amplification attacks.&lt;/V...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00228

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must limit the number of concurrent sessions to 10 for all accounts and/or account types.

    &lt;VulnDiscussion&gt;Operating system management includes the ability to control the number of users and user sessions that utilize an operating s...
    Rule Medium Severity
    Show

  • SRG-OS-000066-GPOS-00034

    <GroupDescription></GroupDescription>
    Group
    Show

  • If AIX is using LDAP for authentication or account information, the /etc/ldap.conf file (or equivalent) must not contain passwords.

    &lt;VulnDiscussion&gt;Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are...
    Rule High Severity
    Show

  • SRG-OS-000104-GPOS-00051

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-OS-000123-GPOS-00064

    <GroupDescription></GroupDescription>
    Group
    Show

  • IP forwarding for IPv4 must not be enabled on AIX unless the system is a router.

    &lt;VulnDiscussion&gt;IP forwarding permits the kernel to forward packets from one network interface to another. The ability to forward packets bet...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must provide the lock command to let users retain their session lock until users are reauthenticated.

    &lt;VulnDiscussion&gt;All systems are vulnerable if terminals are left logged in and unattended. Leaving system terminals unsecure poses a potentia...
    Rule Medium Severity
    Show

  • SRG-OS-000028-GPOS-00009

    <GroupDescription></GroupDescription>
    Group
    Show

  • UIDs reserved for system accounts must not be assigned to non-system accounts on AIX systems.

    &lt;VulnDiscussion&gt;Reserved UIDs are typically used by system software packages. If non-system accounts have UIDs in this range, they may confli...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must be configured with a default gateway for IPv6 if the system uses IPv6 unless the system is a router.

    &lt;VulnDiscussion&gt;If a system has no default gateway defined, the system is at increased risk of man-in-the-middle, monitoring, and Denial of S...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The AIX /etc/passwd, /etc/security/passwd, and/or /etc/group files must not contain a plus (+) without defining entries for NIS+ netgroups or LDAP netgroups.

    &lt;VulnDiscussion&gt;A plus (+) in system accounts files causes the system to lookup the specified entry using NIS. If the system is not using NIS...
    Rule Medium Severity
    Show

  • SRG-OS-000185-GPOS-00079

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-OS-000069-GPOS-00037

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-OS-000076-GPOS-00044

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-OS-000057-GPOS-00027

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must remove NOPASSWD tag from sudo config files.

    &lt;VulnDiscussion&gt;sudo command does not require reauthentication if NOPASSWD tag is specified in /etc/sudoers config file, or sudoers files in ...
    Rule High Severity
    Show

  • SRG-OS-000373-GPOS-00156

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX must not have IP forwarding for IPv6 enabled unless the system is an IPv6 router.

    &lt;VulnDiscussion&gt;If the system is configured for IP forwarding and is not a designated router, it could be used to bypass network security by ...
    Rule Medium Severity
    Show

  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
    Show

  • AIX library files must have mode 0755 or less permissive.

    &lt;VulnDiscussion&gt;Unauthorized access could destroy the integrity of the library files.&lt;/VulnDiscussion&gt;&lt;FalsePositives&gt;&lt;/FalseP...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • Samba packages must be removed from AIX.

    &lt;VulnDiscussion&gt;If the smbpasswd file has a mode more permissive than 0600, the smbpasswd file may be maliciously accessed or modified, poten...
    Rule Medium Severity
    Show

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