Bug 1813066

Summary:	sshd rekey limit update for OSPP
Product:	Red Hat Enterprise Linux 8	Reporter:	Steve Grubb <sgrubb>
Component:	scap-security-guide	Assignee:	Vojtech Polasek <vpolasek>
Status:	CLOSED ERRATA	QA Contact:	Matus Marhefka <mmarhefk>
Severity:	high	Docs Contact:
Priority:	medium
Version:	8.4	CC:	ggasparb, jjaburek, matyc, mhaicman, tmraz, wsato
Target Milestone:	rc	Keywords:	AutoVerified, Reopened, Triaged
Target Release:	8.0	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:29:53 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:	1761915

Description Steve Grubb 2020-03-12 20:34:16 UTC

Description of problem:
There have been some Technical Decisions for OSPP that allows a little more flexibility. We like a couple things amended to ease some restrictions:

sshd_config
Ciphers aes128- gcm, aes256-gcm
RekeyLimit change back to 1G

ssh_config
Ciphers aes128- gcm, aes256-gcm
RekeyLimit change back to 1G

Additional info:
I don't know how this is checked. If crypto policy does that and no changes are needed to support these changes, then feel free to close this bz.

Comment 4 Matěj Týč 2020-03-31 07:54:16 UTC


*** This bug has been marked as a duplicate of bug 1813064 ***

Comment 5 Tomas Mraz 2020-03-31 08:11:59 UTC

Please note that sshd_rekey_limit is not handled by crypto policies.

Comment 6 Vojtech Polasek 2020-04-01 13:48:37 UTC

Concerning sshd, as Matej said, we have rule sshd_rekey_limit, which is currently hardcoded to 512M 1h. We can change it or customize it with a variable.
We have no rule for configuring ssh client rekey limit but it should not be difficult to create one.

Comment 7 Vojtech Polasek 2020-06-09 15:54:44 UTC

Rule for ssh client rekey limit is upstream:
https://github.com/ComplianceAsCode/content/pull/5788
The rule for ssh server rekey limit was adjusted to meet needs of this BZ here:
https://github.com/ComplianceAsCode/content/pull/5782

Comment 8 Watson Yuuma Sato 2020-07-22 15:56:12 UTC

FTR, https://github.com/ComplianceAsCode/content/pull/5772 is also necessary for this BZ, as it prepares the rule to be parametrized.

Comment 19 errata-xmlrpc 2020-11-04 02:29:53 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 (scap-security-guide 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-2020:4626