Bug 808136

Summary:	Print more informative error message when site uses old SSL/TLS version
Product:	Red Hat Enterprise Linux 6	Reporter:	David Jaša <djasa>
Component:	firefox	Assignee:	Martin Stransky <stransky>
Status:	CLOSED ERRATA	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.3	CC:	kengert, stransky, syeghiay, tpelka
Target Milestone:	rc
Target Release:	6.3
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	RHSA-2012:1088	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-08-03 12:37:03 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 David Jaša 2012-03-29 16:53:44 UTC

Description of problem:
Print more informative error message when site uses old SSL/TLS version

Version-Release number of selected component (if applicable):
firefox-10.0.3-1.el6_2.x86_64

How reproducible:
always

Steps to Reproduce:
1. in Preferences -> Advanced, disable SSL 3.0
2. connect to https site using SSL <= 3.0
3.
  
Actual results:
error page says only that the connection has been reset

Expected results:
error page should state that web site only supports SSL (TLS) version <= %s while browser settings require SSL (TLS) version >= %s.

Additional info:

Comment 1 Martin Stransky 2012-06-06 10:30:58 UTC

We have to solve this bug upstream, and I believe it's more for nss/psm folks. David, do you have any reproducer?

Comment 3 Martin Stransky 2012-06-06 11:14:39 UTC

Kai, what do you think about this bug?

Comment 5 Kai Engert (:kaie) (inactive account) 2012-06-06 22:21:59 UTC

My initial reaction is that better user feedback is a "feature". The stable ESR branch of Firefox is not meant to get new features. In particular, introducing new wording is also not an option for the stable branch.

Comment 6 Kai Engert (:kaie) (inactive account) 2012-06-06 22:56:51 UTC

Because of the stable branch limitations, anything requiring new strings would have to wait until Firefox 17 (most likely the next major ESR release).

However, we used to have an error message "no common encryption algorithm(s)". We need to investigate why it's not shown in this scenario.

After a quick test, I see that Firefox attempts to connect to the site multiple times, always fails, and eventually gives up. This indicates a misinterpretation of an NSS error code at the Mozilla applicaiton level.

Comment 7 Kai Engert (:kaie) (inactive account) 2012-06-06 23:32:25 UTC

I filed upstream https://bugzilla.mozilla.org/show_bug.cgi?id=762301

Comment 8 Kai Engert (:kaie) (inactive account) 2012-06-06 23:35:41 UTC

I attached a potential patch to the upstream bug which applies to the Mozilla-ESR10 branch used by current RHEL.
https://bugzilla.mozilla.org/show_bug.cgi?id=762301#c1

With the patch applied, the error message shown is:

An error occurred during a connection to .....
Cannot communicate securely with peer: no common encryption algorithm(s).
(Error code: ssl_error_no_cypher_overlap)

Comment 9 Kai Engert (:kaie) (inactive account) 2012-06-13 11:43:26 UTC

Do you want to pick up this patch in Red Hat's packaged ESR?


The trunk version of the patch was added upstream to the main development branch.

I believe this isn't a regression, and therefore it doesn't qualify for upstream's rules for the ESR branch.

Comment 10 RHEL Program Management 2012-06-25 11:42:54 UTC

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Comment 13 Martin Stransky 2012-08-03 12:37:03 UTC

Fixed in RHSA-2012:1088