The system must use a FIPS 140-2 approved cryptographic hashing algorithm for generating account password hashes.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22303	GEN000590	SV-26313r2_rule		Medium

Description
Systems must employ cryptographic hashes for passwords using the SHA-2 family of algorithms or FIPS 140-2 approved successors. The use of unapproved algorithms may result in weak password hashes more vulnerable to compromise.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2017-03-01

Details

Check Text ( C-35959r2_chk )
Verify the algorithm used for password hashing is of the SHA-2 family. # egrep "password .* pam_unix.so" /etc/pam.d/system-auth-ac # egrep "ENCRYPT_METHOD" /etc/login.defs # egrep "crypt_style" /etc/libuser.conf If any output indicates the hash algorithm is not set to sha256 or sha512, this is a finding.

Fix Text (F-31215r2_fix)
Change the default password algorithm. # authconfig --passalgo=sha512 --update NOTE: Executing the above command will also update the required parameters in /etc/login.defs and /etc/libuser.conf