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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-75461	UBTU-16-010160	SV-90141r1_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
Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide	2018-07-18

Details

Check Text ( C-75165r1_chk )
Verify the shadow password suite configuration is set to encrypt interactive user passwords using a strong cryptographic hash with the following command: Confirm 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-75165r1_chk )

Verify the shadow password suite configuration is set to encrypt interactive user passwords using a strong cryptographic hash with the following command:

Confirm 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-82089r1_fix)
Configure the Ubuntu operating system to encrypt all stored passwords with a strong cryptographic hash. Lock all interactive user accounts not using SHA-512 hashing until the passwords can be regenerated.