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Bug 2023744

Summary:	enable diffie-hellman-group14-sha256 in libssh
Product:	Red Hat Enterprise Linux 8	Reporter:	Alexander Sosedkin <asosedki>
Component:	crypto-policies	Assignee:	Alexander Sosedkin <asosedki>
Status:	CLOSED ERRATA	QA Contact:	Ondrej Moriš <omoris>
Severity:	low	Docs Contact:	Jan Fiala <jafiala>
Priority:	low
Version:	8.6	CC:	jafiala, omoris
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	crypto-policies-20211116-1.gitae470d6.el8	Doc Type:	Enhancement
Doc Text:	.Crypto policies support `diffie-hellman-group14-sha256` You can now use the `diffie-hellman-group14-sha256` key exchange (KEX) algorithm for the `libssh` library in RHEL system-wide cryptographic policies. This update also provides parity with OpenSSH, which also supports this KEX algorithm. With this update, `libssh` has `diffie-hellman-group14-sha256` enabled by default, but you can disable it by using a custom crypto policy.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-10 15:22:45 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 Alexander Sosedkin 2021-11-16 12:27:58 UTC

Description of problem: libssh gained support for diffie-hellman-group14-sha256 in 0.9.4. We have 0.9.4 since 8.3, yet haven't enabled the algorithm in crypto-policies.

Version-Release number of selected component (if applicable): crypto-policies-20210617-1.gitc776d3e.el8
How reproducible: always
Steps to Reproduce: look at the policies
Actual results: no diffie-hellman-group14-sha256 in libssh configs
Expected results: diffie-hellman-group14-sha256 in libssh configs where openssh has it

Additional info:
* https://www.libssh.org/2020/04/09/libssh-0-9-4-and-libssh-0-8-9-security-release
* https://gitlab.com/redhat-crypto/fedora-crypto-policies/-/commit/03870400c7f837e2af9cc637a3bdbb5991d95873

Comment 10 errata-xmlrpc 2022-05-10 15:22:45 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 (crypto-policies 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-2022:2044