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RHEL 9 shadow password suite must be configured to use a sufficient number of hashing rounds.


Overview

Finding ID Version Rule ID IA Controls Severity
V-258119 RHEL-09-611150 SV-258119r997104_rule Medium
Description
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. Passwords that are encrypted with a weak algorithm are no more protected than if they are kept in plain text. Using more hashing rounds makes password cracking attacks more difficult. Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000120-GPOS-00061
STIG Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide 2024-06-04

Details

Check Text ( C-61860r926342_chk )
Verify that RHEL 9 has a minimum number of hash rounds configured with the following command:

$ grep -i sha_crypt /etc/login.defs

If "SHA_CRYPT_MIN_ROUNDS" or "SHA_CRYPT_MAX_ROUNDS" is less than "5000", this is a finding.
Fix Text (F-61784r926343_fix)
Configure RHEL 9 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