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Bug 1990877 - Activating legacy provider in openssl breaks new openssh connection
Summary: Activating legacy provider in openssl breaks new openssh connection
Keywords:
Status: CLOSED DUPLICATE of bug 1975836
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: openssl
Version: 9.0
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: beta
: ---
Assignee: Sahana Prasad
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-08-06 13:53 UTC by Dmitry Belyavskiy
Modified: 2021-08-06 15:40 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-08-06 15:40:04 UTC
Type: Bug
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github openssl openssl issues 16249 0 None None None 2021-08-06 13:53:25 UTC
Red Hat Issue Tracker RHELPLAN-92670 0 None None None 2021-08-06 13:56:03 UTC

Description Dmitry Belyavskiy 2021-08-06 13:53:25 UTC
Description of problem:
Currently installed openssl.cnf contain the following section:

[default_sect] 
# activate = 1 

If there are no other provider sections, we load and activate the default provider according to documentation. 

If we add the legacy section and don't uncomment the activate=1 line, it makes impossible to login into the machine via ssh, because only legacy algorithms persisted enabled.

Version-Release number of selected component (if applicable):
3.0.0

How reproducible:
Always

Steps to Reproduce:
1. vim /etc/pki/tls/openssl.cnf
2. add 'legacy = legacy_sect' to [provider_sect] section
3. add a section 
[legacy_sect] 
activate = 1 
4. save the file
5. Try to ssh the machine

Actual results:
$ ssh hostname
kex_exchange_identification: read: Connection reset by peer
Connection reset by hostname port 22

Expected results:
Successful ssh to remote machine

Additional info:
Looks like we can't do anything to avoid this problem, but if we activate the default provider explicitly and add an explaining comment, it can help.

Comment 1 Alicja Kario 2021-08-06 15:40:04 UTC
that's not correct way to enable legacy provider, so it breaking the system configuration is expected given the behaviour documented in upstream documentation

as such it's a duplicate of bug 1975836

*** This bug has been marked as a duplicate of bug 1975836 ***


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