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Bug 1677754

Summary:	Random failure to resume session with GnuTLS client
Product:	Red Hat Enterprise Linux 8	Reporter:	Alicja Kario <hkario>
Component:	gnutls	Assignee:	Anderson Sasaki <ansasaki>
Status:	CLOSED ERRATA	QA Contact:	Alexander Sosedkin <asosedki>
Severity:	low	Docs Contact:	Jan Fiala <jafiala>
Priority:	medium
Version:	8.0	CC:	ansasaki, asosedki, dueno, jafiala, lmanasko, nmavrogi, ssorce
Target Milestone:	rc	Keywords:	Triaged
Target Release:	8.0	Flags:	ssorce: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	gnutls-3.6.13-3.el8	Doc Type:	Known Issue
Doc Text:	.GnuTLS tolerates longer delays during session resumption Previously, the client implementation of the GnuTLS library negotiated a new TLS (Transport Layer Security) 1.3 session instead of resuming a previously negotiated one if the server did not send session resumption data within 50 ms. This incurred a minor performance impact on session negotiation. With this update, the client waits for an estimated round-trip time plus 100 ms. As a result, the GnuTLS client session resumption is more robust when paired with slow servers or communicating over slow network links. Additionally, for debugging purposes, you can make the client wait indefinitely by using the new `--waitresumption` option for the `--resume` option in the `gnutls-cli` utility.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 01:55:24 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:	1682477, 1689967, 1789392
Bug Blocks:

Description Alicja Kario 2019-02-15 19:16:01 UTC

Description of problem:
GnuTLS fails to resume session with the NSS server, randomly.

Version-Release number of selected component (if applicable):
gnutls-3.6.5-1.el8.x86_64
nss-3.41.0-5.el8.x86_64

How reproducible:
randomly, less than 30% connections that attempt resumption fail

Steps to Reproduce:
1. start nss server, attempt multiple resumptions
2.
3.

Actual results:
some connections fail to resume session

Expected results:
all sessions should be able to resume when the ticket is not reused

Additional info:

Comment 1 Alicja Kario 2019-02-18 12:46:28 UTC

reproduced also against OpenSSL server so looks like the issue is in GnuTLS.

Comment 2 Anderson Sasaki 2019-03-13 17:36:35 UTC

This issue was set to medium priority because it does not affect core functionality of a component.

Comment 3 Anderson Sasaki 2019-03-22 14:47:45 UTC

Upstream fix:
https://gitlab.com/gnutls/gnutls/merge_requests/936

Comment 12 Simo Sorce 2019-09-05 12:17:09 UTC

Retarget to 8.3 for the time being

Comment 24 errata-xmlrpc 2020-11-04 01:55:24 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 (gnutls 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-2020:4526