The SUSE operating system must employ FIPS 140-2-approved cryptographic hashing algorithms for all stored passwords.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-77099	SLES-12-010220	SV-91795r2_rule		Medium

Description
The system must use a strong hashing algorithm to store the password. The system must use a sufficient number of hashing rounds to ensure the required level of entropy. Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000120-GPOS-00061

Description

The system must use a strong hashing algorithm to store the password. The system must use a sufficient number of hashing rounds to ensure the required level of entropy. Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000120-GPOS-00061

STIG	Date
SLES 12 Security Technical Implementation Guide	2019-03-12

Details

Check Text ( C-76709r2_chk )
Verify the SUSE operating system requires the shadow password suite configuration be set to encrypt interactive user passwords using a strong cryptographic hash. Check that the interactive user account passwords are using a strong password hash with the following command: # sudo cut -d: -f2 /etc/shadow $6$kcOnRq/5$NUEYPuyL.wghQwWssXRcLRFiiru7f5JPV6GaJhNC2aK5F3PZpE/BCCtwrxRc/AInKMNX3CdMw11m9STiql12f/ Password hashes "!" or "*" indicate inactive accounts not available for logon and are not evaluated. If any interactive user password hash does not begin with "$6", this is a finding.

Check Text ( C-76709r2_chk )

Verify the SUSE operating system requires the shadow password suite configuration be set to encrypt interactive user passwords using a strong cryptographic hash.

Check that the interactive user account passwords are using a strong password hash with the following command:

# sudo cut -d: -f2 /etc/shadow

$6$kcOnRq/5$NUEYPuyL.wghQwWssXRcLRFiiru7f5JPV6GaJhNC2aK5F3PZpE/BCCtwrxRc/AInKMNX3CdMw11m9STiql12f/

Password hashes "!" or "*" indicate inactive accounts not available for logon and are not evaluated.

If any interactive user password hash does not begin with "$6", this is a finding.

Fix Text (F-83797r2_fix)
Configure the SUSE operating system to encrypt all stored passwords with a strong cryptographic hash. Set "ENCRYPT_METHOD" in "/etc/login.defs" to "SHA512" by running the following command as a superuser: # sudo grep -q '^.ENCRYPT_METHOD' /etc/login.defs && sudo sed -i 's/^.ENCRYPT_METHOD.*/ENCRYPT_METHOD SHA512/' /etc/login.defs \|\| sudo echo 'ENCRYPT_METHOD SHA512' >> /etc/login.defs Lock all interactive user accounts not using SHA512 hashing until the passwords can be regenerated.

Fix Text (F-83797r2_fix)

Configure the SUSE operating system to encrypt all stored passwords with a strong cryptographic hash.

Set "ENCRYPT_METHOD" in "/etc/login.defs" to "SHA512" by running the following command as a superuser:

# sudo grep -q '^.*ENCRYPT_METHOD' /etc/login.defs && sudo sed -i 's/^.*ENCRYPT_METHOD.*/ENCRYPT_METHOD SHA512/' /etc/login.defs || sudo echo 'ENCRYPT_METHOD SHA512' >> /etc/login.defs

Lock all interactive user accounts not using SHA512 hashing until the passwords can be regenerated.