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Bug 2157953

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: gnutlsAssignee: Daiki Ueno <dueno>
Status: CLOSED ERRATA QA Contact: Alexander Sosedkin <asosedki>
Severity: unspecified Docs Contact: Mirek Jahoda <mjahoda>
Priority: high    
Version: 9.0CC: asosedki, cllang, dueno, gfialova, mjahoda, ssorce
Target Milestone: rcKeywords: Triaged, ZStream
Target Release: ---Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: gnutls-3.7.6-22.el9 Doc Type: Enhancement
Doc Text:
.GnuTLS requires EMS with TLS 1.2 in FIPS mode To comply with the FIPS-140-3 standard, GnuTLS servers and clients require the Extended Master Secret (EMS) extension (RFC 7627) for all TLS 1.2 connections negotiated in FIPS mode. If your scenario requires preserving compatibility with older servers and clients that do not support EMS and you cannot use TLS 1.3, you can apply the `NO-ENFORCE-EMS` system-wide cryptographic subpolicy: ---- # update-crypto-policies --set FIPS:NO-ENFORCE-EMS ---- WARNING: If you allow TLS 1.2 connections without EMS, your system no longer meets the FIPS-140-3 requirements.
 Story Points: ---
Clone Of:
: 2227257 2227258 (view as bug list) Environment:
Last Closed: 2023-11-07 08:56:09 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: 2227257, 2227258    

Description Alicja Kario 2023-01-03 17:10:07 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.

GnuTLS should have a way to require use of EMS when in FIPS mode.
Comment 26 errata-xmlrpc 2023-11-07 08:56:09 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 (gnutls 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-2023:6689