Issue
Description of problem:
Installation of a RHEL 7.9 client fails in FIPS mode with a RHEL 9.2 server.
Version-Release number of selected component (if applicable):
Client:
rpm -qa ipa-client openssl
ipa-client-4.6.8-5.el7_9.14.x86_64
openssl-1.0.2k-26.el7_9.x86_64
Server:
rpm -qa ipa-server openssl
openssl-3.0.7-16.el9_2.x86_64
ipa-server-4.10.1-7.el9_2.x86_64
How reproducible:
Always
Steps to Reproduce:
1. Install a RHEL 9.2 server in FIPS mode
ipa-server-install --domain ipa.test --realm IPA.TEST -a password - password -U
2. Install a RHEL 7.9 client in FIPS mode
ipa-client-install --domain ipa.test --realm IPA.TEST --server server.ipa.test --principal admin --password password -U
Actual results:
The client installation fails due to a SSL handshake failure:
ipa-client-install --domain ipa.test --realm IPA.TEST --server server.ipa.test --principal admin --password Secret123 -U
WARNING: ntpd time&date synchronization service will not be configured as
conflicting service (chronyd) is enabled
Use --force-ntpd option to disable it and force configuration of ntpd
Client hostname: client.ipa.test
Realm: IPA.TEST
DNS Domain: ipa.test
IPA Server: server.ipa.test
BaseDN: dc=ipa,dc=test
Skipping synchronizing time with NTP server.
Successfully retrieved CA cert
Subject:
CN=Certificate Authority,O=IPA.TEST
Issuer:
CN=Certificate Authority,O=IPA.TEST
Valid From: 2023-07-06 12:52:19
Valid Until: 2043-07-06 12:52:19
Enrolled in IPA realm IPA.TEST
Created /etc/ipa/default.conf
New SSSD config will be created
Configured sudoers in /etc/nsswitch.conf
Configured /etc/sssd/sssd.conf
trying https://server.ipa.test/ipa/json
[try 1]: Forwarding 'schema' to json server 'https://server.ipa.test/ipa/json'
cannot connect to 'https://server.ipa.test/ipa/json': [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure (_ssl.c:618)
The ipa-client-install command failed. See /var/log/ipaclient-install.log for more information
Expected results:
Client installation should succeed.
Additional info:
This issue is related to the change done on openssl side with Bug 2188046 - Support requiring EMS in TLS 1.2, default to it when in FIPS mode [rhel-9.2.0.z]
In FIPS mode, if the server is installed with openssl-3.0.7-16.el9_2, the TLS Extended Master Secret (EMS) extension (RFC 7627) is mandatory for TLS 1.2 connections.
RHEL 7.9 clients can communicate only using TLS 1.2 but don't support this extension. RHEL 8.x clients support TLS 1.2 and TLS 1.3 and are not impacted.
The direct consequence is that RHEL 7.9 clients cannot join a RHEL 9.2+ server in FIPS mode. This limitation should be documented.
