VMware Postgres must use FIPS 140-2 approved TLS ciphers.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-239207	VCPG-67-000015	SV-239207r717058_rule		High

Description
Use of weak or unvalidated cryptographic algorithms undermines the purposes of using encryption and digital signatures to protect data. Weak algorithms can be broken, and unvalidated cryptographic modules may not implement algorithms correctly. Unapproved cryptographic modules or algorithms should not be relied on for authentication, confidentiality, or integrity. Weak cryptography could allow an attacker to gain access to and modify data stored in the database as well as the administration settings of the DBMS. VMware Postgres does not currently implement FIPS-validated cryptographic modules. This is on the roadmap but, in the interim, Postgres can be configured with strong ciphers from the FIPS 140 approved suite. Additionally, as an embedded database and available only on localhost for standalone VCSAs, TLS connections are used only in high-availability deployments for connections between a primary and a standby. Satisfies: SRG-APP-000179-DB-000114, SRG-APP-000514-DB-000381, SRG-APP-000514-DB-000382, SRG-APP-000514-DB-000383

Description

Use of weak or unvalidated cryptographic algorithms undermines the purposes of using encryption and digital signatures to protect data. Weak algorithms can be broken, and unvalidated cryptographic modules may not implement algorithms correctly. Unapproved cryptographic modules or algorithms should not be relied on for authentication, confidentiality, or integrity. Weak cryptography could allow an attacker to gain access to and modify data stored in the database as well as the administration settings of the DBMS. VMware Postgres does not currently implement FIPS-validated cryptographic modules. This is on the roadmap but, in the interim, Postgres can be configured with strong ciphers from the FIPS 140 approved suite. Additionally, as an embedded database and available only on localhost for standalone VCSAs, TLS connections are used only in high-availability deployments for connections between a primary and a standby. Satisfies: SRG-APP-000179-DB-000114, SRG-APP-000514-DB-000381, SRG-APP-000514-DB-000382, SRG-APP-000514-DB-000383

STIG	Date
VMware vSphere 6.7 PostgreSQL Security Technical Implementation Guide	2021-04-15

Details

Check Text ( C-42440r678992_chk )
At the command prompt, execute the following command: # /opt/vmware/vpostgres/current/bin/psql -U postgres -c "SHOW ssl_ciphers;"\|sed -n 3p\|sed -e 's/^[ ]*//' Expected result: !aNULL:kECDH+AES:ECDH+AES:RSA+AES:@STRENGTH If the output does not match the expected result, this is a finding.

Fix Text (F-42399r678993_fix)
At the command prompt, execute the following commands: # /opt/vmware/vpostgres/current/bin/psql -U postgres -c "ALTER SYSTEM SET ssl_ciphers TO '!aNULL:kECDH+AES:ECDH+AES:RSA+AES:@STRENGTH';" # /opt/vmware/vpostgres/current/bin/psql -U postgres -c "SELECT pg_reload_conf();"