Bug 2151888

Summary:	stunnel does not correctly retry password prompts for encrypted private keys, and stops prompting for the password completely with OpenSSL 3.0.7
Product:	Red Hat Enterprise Linux 9	Reporter:	Clemens Lang <cllang>
Component:	stunnel	Assignee:	Clemens Lang <cllang>
Status:	CLOSED ERRATA	QA Contact:	Ondrej Moriš <omoris>
Severity:	low	Docs Contact:
Priority:	medium
Version:	9.2	Keywords:	Triaged
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	stunnel-5.62-3.el9	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-09 08:24:32 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 Clemens Lang 2022-12-08 13:23:08 UTC

Description of problem:
Stunnel has a ui_retry() function that inspects the topmost entry on the OpenSSL error stack to decide whether it should re-try a certain operation.

With OpenSSL 3, many of these error codes changed. For example, when using an encrypted private key, stunnel will prompt for the password on startup, but will not repeat the prompt with OpenSSL 3 when the password is entered incorrectly, because the error code returned for this case changed.

This problem becomes worse with OpenSSL 3.0.7 in RHEL 9.2: because of the same root cause, stunnel no longer prompts for the password at all.


Version-Release number of selected component (if applicable):
stunnel-5.62-2.el9
openssl-3.0.7-2.el9

How reproducible:
stunnel/Sanity/smoke-test

Steps to Reproduce:
1. ft redhat.os.rhel9 --release=9.1.0 --updates=z-stream + redhat.crypto.brewed.install openssl-3.0.7-2.el9 + redhat.rhts.exec

Actual results: Test fails


Expected results: Test passes


Additional info:
Originally discovered in https://bugzilla.redhat.com/show_bug.cgi?id=2129063#c6

Fix is backporting the changes in src/ctx.c and src/common.h from https://github.com/mtrojnar/stunnel/commit/6baa5762ea5edb192ec003333d62b1d0e56509bf.

Comment 7 errata-xmlrpc 2023-05-09 08:24:32 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 (stunnel 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-2023:2551