The operating system must prevent non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-71971	RHEL-07-020020	SV-86595r1_rule		Medium

Description
Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals who do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users.

Description

Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals who do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users.

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2017-12-14

Details

Check Text ( C-72203r1_chk )
Verify the operating system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures. Get a list of authorized users (other than System Administrator and guest accounts) for the system. Check the list against the system by using the following command: # semanage login -l \| more Login Name SELinux User MLS/MCS Range Service __default__ user_u s0-s0:c0.c1023 * root unconfined_u s0-s0:c0.c1023 * system_u system_u s0-s0:c0.c1023 * joe staff_u s0-s0:c0.c1023 * All administrators must be mapped to the "sysadm_u" or "staff_u" users with the appropriate domains (sysadm_t and staff_t). All authorized non-administrative users must be mapped to the "user_u" role or the appropriate domain (user_t). If they are not mapped in this way, this is a finding.

Check Text ( C-72203r1_chk )

Verify the operating system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

Get a list of authorized users (other than System Administrator and guest accounts) for the system.

Check the list against the system by using the following command:

# semanage login -l | more
Login Name SELinux User MLS/MCS Range Service
__default__ user_u s0-s0:c0.c1023 *
root unconfined_u s0-s0:c0.c1023 *
system_u system_u s0-s0:c0.c1023 *
joe staff_u s0-s0:c0.c1023 *

All administrators must be mapped to the "sysadm_u" or "staff_u" users with the appropriate domains (sysadm_t and staff_t).

All authorized non-administrative users must be mapped to the "user_u" role or the appropriate domain (user_t).

If they are not mapped in this way, this is a finding.

Fix Text (F-78323r1_fix)
Configure the operating system to prevent non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures. Use the following command to map a new user to the "sysdam_u" role: #semanage login -a -s sysadm_u Use the following command to map an existing user to the "sysdam_u" role: #semanage login -m -s sysadm_u Use the following command to map a new user to the "staff_u" role: #semanage login -a -s staff_u Use the following command to map an existing user to the "staff_u" role: #semanage login -m -s staff_u Use the following command to map a new user to the "user_u" role: # semanage login -a -s user_u Use the following command to map an existing user to the "user_u" role: # semanage login -m -s user_u

Fix Text (F-78323r1_fix)

Configure the operating system to prevent non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

Use the following command to map a new user to the "sysdam_u" role:

#semanage login -a -s sysadm_u

Use the following command to map an existing user to the "sysdam_u" role:

#semanage login -m -s sysadm_u

Use the following command to map a new user to the "staff_u" role:

#semanage login -a -s staff_u

Use the following command to map an existing user to the "staff_u" role:

#semanage login -m -s staff_u

Use the following command to map a new user to the "user_u" role:

# semanage login -a -s user_u

Use the following command to map an existing user to the "user_u" role:

# semanage login -m -s user_u