Bug 1333515

Summary:	Enable DS to offer weaker DH params in NSS
Product:	Red Hat Enterprise Linux 7	Reporter:	Noriko Hosoi <nhosoi>
Component:	389-ds-base	Assignee:	Noriko Hosoi <nhosoi>
Status:	CLOSED ERRATA	QA Contact:	Viktor Ashirov <vashirov>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.3	CC:	nkinder, rmeggins, spichugi, windhamg
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	389-ds-base-1.3.5.3-1.el7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-11-03 20:41:51 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Noriko Hosoi 2016-05-05 17:24:51 UTC

This bug is created as a clone of upstream ticket:
https://fedorahosted.org/389/ticket/48798

Certain client applications, especially java may crash with the following:

{{{
javax.net.ssl.SSLException: java.lang.RuntimeException: Could not generate DH keypair
}}}

This affects java 1.6.0 and 1.7.0.

When nss upgrades to 2.21, it enables DH in ciphers. By default the smallest DH param size is 2048 bits.

However, java 1.6.0 and 1.7.0 can only accept up to 1024 bit params.

DS should have the option, to set NSS to offer smaller (weaker) param sizes for compatibility with older clients.

Comment 2 Simon Pichugin 2016-07-15 05:18:34 UTC

Build tested:
389-ds-base-1.3.5.10-5.el7.x86_64

=========================== test session starts ===========================
platform linux2 -- Python 2.7.5, pytest-2.9.2, py-1.4.31, pluggy-0.3.1 -- /usr/bin/python
cachedir: dirsrvtests/tests/tickets/.cache
rootdir: /mnt/tests/rhds/tests/upstream/ds/dirsrvtests/tests/tickets, inifile:
plugins: html-1.9.0, cov-2.3.0
collected 1 items

dirsrvtests/tests/tickets/ticket48798_test.py::test_ticket48798 PASSED

======================== 1 passed in 37.11 seconds ========================

Marking as verifed.

Comment 4 errata-xmlrpc 2016-11-03 20:41:51 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://rhn.redhat.com/errata/RHSA-2016-2594.html