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The RHEL 8 shadow password suite must be configured to use a sufficient number of hashing rounds.


Overview

Finding ID Version Rule ID IA Controls Severity
V-230233 RHEL-08-010130 SV-230233r809273_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.
STIG Date
Red Hat Enterprise Linux 8 Security Technical Implementation Guide 2022-06-15

Details

Check Text ( C-32902r809271_chk )
Check that a minimum number of hash rounds is configured by running the following command:

$ sudo egrep "^SHA_CRYPT_" /etc/login.defs

If only one of "SHA_CRYPT_MIN_ROUNDS" or "SHA_CRYPT_MAX_ROUNDS" is set, and this value is below "5000", this is a finding.

If both "SHA_CRYPT_MIN_ROUNDS" and "SHA_CRYPT_MAX_ROUNDS" are set, and the highest value for either is below "5000", this is a finding.
Fix Text (F-32877r809272_fix)
Configure RHEL 8 to encrypt all stored passwords with a strong cryptographic hash.

Edit/modify the following line in the "/etc/login.defs" file and set "SHA_CRYPT_MIN_ROUNDS" to a value no lower than "5000":

SHA_CRYPT_MIN_ROUNDS 5000