The SLES for vRealize must generate audit records for all account creations, modifications, disabling, and termination events.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-239640	VROM-SL-001455	SV-239640r662371_rule		Medium

Description
Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter).

STIG	Date
VMware vRealize Operations Manager 6.x SLES Security Technical Implementation Guide	2021-07-01

Details

Check Text ( C-42873r662369_chk )
Determine if execution of the "usermod" and "groupmod" executable are audited: # auditctl -l \| egrep '(usermod\|groupmod)' If either "useradd" or "groupadd" are not listed with a permissions filter of at least "x", this is a finding. Determine if execution of the "userdel" and "groupdel" executable are audited: # auditctl -l \| egrep '(userdel\|groupdel)' If either "userdel" or "groupdel" are not listed with a permissions filter of at least "x", this is a finding. Determine if execution of "useradd" and "groupadd" are audited: # auditctl -l \| egrep '(useradd\|groupadd)' If either "useradd" or "groupadd" are not listed with a permissions filter of at least "x", this is a finding. Determine if execution of the passwd executable is audited: # auditctl -l \| grep "/usr/bin/passwd" If "/usr/bin/passwd" is not listed with a permissions filter of at least "x", this is a finding. Determine if "/etc/passwd", "/etc/shadow", "/etc/group", and "/etc/security/opasswd" are audited for writing: # auditctl -l \| egrep '(/etc/passwd\|/etc/shadow\|/etc/group\|/etc/security/opasswd)' If any of these are not listed with a permissions filter of at least "w", this is a finding.

Check Text ( C-42873r662369_chk )

Determine if execution of the "usermod" and "groupmod" executable are audited:

# auditctl -l | egrep '(usermod|groupmod)'

If either "useradd" or "groupadd" are not listed with a permissions filter of at least "x", this is a finding.

Determine if execution of the "userdel" and "groupdel" executable are audited:

# auditctl -l | egrep '(userdel|groupdel)'

If either "userdel" or "groupdel" are not listed with a permissions filter of at least "x", this is a finding.

Determine if execution of "useradd" and "groupadd" are audited:

# auditctl -l | egrep '(useradd|groupadd)'

If either "useradd" or "groupadd" are not listed with a permissions filter of at least "x", this is a finding.

Determine if execution of the passwd executable is audited:

# auditctl -l | grep "/usr/bin/passwd"

If "/usr/bin/passwd" is not listed with a permissions filter of at least "x", this is a finding.

Determine if "/etc/passwd", "/etc/shadow", "/etc/group", and "/etc/security/opasswd" are audited for writing:

# auditctl -l | egrep '(/etc/passwd|/etc/shadow|/etc/group|/etc/security/opasswd)'

If any of these are not listed with a permissions filter of at least "w", this is a finding.

Fix Text (F-42832r662370_fix)
Configure execute auditing of the "usermod" and "groupmod" executables. Add the following to the "/etc/audit/audit.rules" file: -w /usr/sbin/usermod -p x -k usermod -w /usr/sbin/groupmod -p x -k groupmod Configure execute auditing of the "userdel" and "groupdel" executables. Add the following to the "/etc/audit/audit.rules" file: -w /usr/sbin/userdel -p x -k userdel -w /usr/sbin/groupdel -p x -k groupdel Configure execute auditing of the "useradd" and "groupadd" executables. Add the following to audit.rules: -w /usr/sbin/useradd -p x -k useradd -w /usr/sbin/groupadd -p x -k groupadd Configure execute auditing of the "passwd" executable. Add the following to audit.rules: -w /usr/bin/passwd -p x -k passwd Configure write auditing of the "passwd", "shadow", "group", and "opasswd" files. Add the following to the "/etc/audit/audit.rules" file: -w /etc/passwd -p wa -k passwd -w /etc/shadow -p wa -k shadow -w /etc/group -p wa -k group -w /etc/security/opasswd -p wa -k opasswd Restart the auditd service: # service auditd restart OR # /etc/dodscript.sh

Fix Text (F-42832r662370_fix)

Configure execute auditing of the "usermod" and "groupmod" executables. Add the following to the "/etc/audit/audit.rules" file:

-w /usr/sbin/usermod -p x -k usermod
-w /usr/sbin/groupmod -p x -k groupmod

Configure execute auditing of the "userdel" and "groupdel" executables. Add the following to the "/etc/audit/audit.rules" file:

-w /usr/sbin/userdel -p x -k userdel
-w /usr/sbin/groupdel -p x -k groupdel

Configure execute auditing of the "useradd" and "groupadd" executables. Add the following to audit.rules:

-w /usr/sbin/useradd -p x -k useradd
-w /usr/sbin/groupadd -p x -k groupadd

Configure execute auditing of the "passwd" executable. Add the following to audit.rules:

-w /usr/bin/passwd -p x -k passwd

Configure write auditing of the "passwd", "shadow", "group", and "opasswd" files. Add the following to the "/etc/audit/audit.rules" file:

-w /etc/passwd -p wa -k passwd
-w /etc/shadow -p wa -k shadow
-w /etc/group -p wa -k group
-w /etc/security/opasswd -p wa -k opasswd

Restart the auditd service:

# service auditd restart

OR

# /etc/dodscript.sh