Bug 1741641

Summary:	OpenSSL will sign ServerKeyExchange message with SHA-1 in FIPS mode
Product:	Red Hat Enterprise Linux 8	Reporter:	Hubert Kario <hkario>
Component:	openssl	Assignee:	Tomas Mraz <tmraz>
Status:	CLOSED ERRATA	QA Contact:	Hubert Kario <hkario>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	8.0	CC:	asosedki, szidek
Target Milestone:	rc	Keywords:	Triaged
Target Release:	8.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openssl-1.1.1c-9.el8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-28 16:51:58 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:

Description Hubert Kario 2019-08-15 17:03:32 UTC

Description of problem:
When openssl server is running in FIPS mode (i.e. with policy disallowing SHA-1 signatures), it will still sign ServerKeyExchange message in TLS 1.2 using SHA-1 if the client didn't include signature_algorithms extension in ClientHello.

Version-Release number of selected component (if applicable):
openssl-1.1.1c-2.el8.x86_64

How reproducible:
always

Steps to Reproduce:
1. Set system in FIPS mode, start openssl s_server
2. connect with client that advertises TLS 1.2 at most and does not include signature_algorithms (but does include supported_curves with P-256 and a ECDHE cipher
3.

Actual results:
Connection successful

Expected results:
Connection should be aborted by server, either with handshake_failure or insufficient_security alert

Additional info:

Comment 14 errata-xmlrpc 2020-04-28 16:51:58 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, 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/RHSA-2020:1840

Comment 15 Fedora Update System 2020-05-29 00:56:57 UTC

FEDORA-EPEL-2020-ff94ccbdec has been pushed to the Fedora EPEL 7 stable repository.
If problem still persists, please make note of it in this bug report.