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Bug 2157951

Summary:	Support requiring EMS in TLS 1.2, default to it when in FIPS mode
Product:	Red Hat Enterprise Linux 9	Reporter:	Alicja Kario <hkario>
Component:	openssl	Assignee:	Dmitry Belyavskiy <dbelyavs>
Status:	CLOSED ERRATA	QA Contact:	Alicja Kario <hkario>
Severity:	medium	Docs Contact:	Mirek Jahoda <mjahoda>
Priority:	medium
Version:	9.0	CC:	ahadas, anarnold, cllang, fhanzelk, joschrod, mjahoda, rjones, ssorce
Target Milestone:	rc	Keywords:	Triaged, ZStream
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openssl-3.0.7-16.el9	Doc Type:	Enhancement
Doc Text:	.The `Extended Master Secret` TLS Extension is now enforced on FIPS-enabled systems With the release of the link:https://access.redhat.com/errata/RHSA-2023:3722[RHSA-2023:3722] advisory, the TLS `Extended Master Secret` (EMS) extension (RFC 7627) is mandatory for TLS 1.2 connections on FIPS-enabled RHEL 9 systems. This is in accordance with FIPS-140-3 requirements. TLS 1.3 is not affected. Legacy clients that do not support EMS or TLS 1.3 now cannot connect to FIPS servers running on RHEL 9. Similarly, RHEL 9 clients in FIPS mode cannot connect to servers that only support TLS 1.2 without EMS. This in practice means that these clients cannot connect to servers on RHEL 6, RHEL 7 and non-RHEL legacy operating systems. This is because the legacy 1.0.x versions of OpenSSL do not support EMS or TLS 1.3. For more information, see link:https://access.redhat.com/solutions/7018256[TLS Extension "Extended Master Secret" enforced with Red Hat Enterprise Linux 9.2].	Story Points:	---
Clone Of:
Clones:	2188046 (view as bug list)		Environment:
Last Closed:	2023-11-07 08:52:59 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2188046, 2218721

Description Alicja Kario 2023-01-03 17:03:40 UTC

Description of problem:
FIPS 140-3 IG requires that only EMS KDF is in use for TLS 1.2 with modules validated after May 2023.

OpenSSL should have a way to require use of EMS when in FIPS mode.

Comment 12 Richard W.M. Jones 2023-06-30 07:54:34 UTC

This change prevents connecting to VMware servers which stops all kinds of
things such as backups and V2V conversions: bug 2218721

Comment 13 Alicja Kario 2023-06-30 10:04:53 UTC

Requiring use of TLSv1.2 with EMS is a non-optional requirement for cryptographic modules certified under current FIPS 140-3.

The solution is to upgrade the openssl used by VMware.

The EMS extension was standardised 8 years ago (RFC7627). If for some reason they don't want to use EMS, they can also use TLSv1.3, which was standardised 5 years ago (RFC8446).

Comment 26 errata-xmlrpc 2023-11-07 08:52:59 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (openssl bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:6627