Red Hat Bugzilla – 2151888 – stunnel does not correctly retry password prompts for encrypted private keys, and stops prompting for the password completely with OpenSSL 3.0.7
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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.
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