Bug 1547144

Summary:	openwsmand does not support ECDH ciphers
Product:	Red Hat Enterprise Linux 7	Reporter:	Alois Mahdal <amahdal>
Component:	openwsman	Assignee:	Vitezslav Crhonek <vcrhonek>
Status:	CLOSED ERRATA	QA Contact:	Martin Kyral <mkyral>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.5	CC:	djez, mkyral
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openwsman-2.6.3-4.git4391e5c.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-10-30 11:09:08 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:	1549619, 1551541

Description Alois Mahdal 2018-02-20 15:38:35 UTC

Description of problem
======================

While testing bug 1454607 (to enable cipher blacklist), it turned out
that openwsmand does not handle ECDH properly.  That is, if I set cipher
list to eg. ECDH (ie. all ECDH based ciphers), s_client with DEFAULT
set will not be able to connect.

According to @hkario, this could be caused by misconfiguration on
openwsmand part, since ECDH ciphers may require special configuration
calls (which indeed don't appear in downstream shttpd.c).



Version-Release number of selected component
============================================

openwsman-server-2.6.3-3.git4391e5c.el7


How reproducible
================

Always


Steps to Reproduce
==================

 1. set ssl_ciphers_list = ECDH
 2. start up openwsmand
 3. connect with a client with ECDH cipher string, eg.

        openssl s_client -connect $SrvHost:$SrvPort -ciphers ECDH <.


Actual results
==============

SSL handshake failure


Expected results
================

Successful connection (or other failure)


Additional info
===============

Alternatively, you can scan openwsmand port with

    nmap -sV --script ssl-enum-ciphers $SrvHost -p $SrvPort

which will reveal that no ciphers were enabled on the server.

Also this is probably not just ECDH but also other EC* ciphers.

Comment 2 Vitezslav Crhonek 2018-02-28 11:58:42 UTC

https://github.com/Openwsman/openwsman/pull/103

resolves the issue.

Comment 8 errata-xmlrpc 2018-10-30 11:09:08 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/RHBA-2018:3200