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

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000803

SV-63943r2_rule The system must use a FIPS 140-2 approved cryptographic hashing algorithm for generating account password hashes.

Vulnerability discussion

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.

Check content

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

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

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