Bug #37060: Using nonASCII characters in sudo password in REX raises NoMethodError undefined method `empty?' for nil:NilClass: - foreman-tasks - Foreman

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Bug #37060

closed

Using nonASCII characters in sudo password in REX raises NoMethodError undefined method `empty?' for nil:NilClass:

Added by Adam Ruzicka 5 months ago. Updated 3 months ago.

Status:

Closed

Priority:

Normal

Assignee:

Adam Ruzicka

Category:

Proxy plugin

Target version:

Difficulty:

Triaged:

Bugzilla link:

2258968

Pull request:

https://github.com/theforeman/smart_proxy_dynflow/pull/131

Fixed in Releases:

smart_proxy_dynflow-0.9.2

Found in Releases:

Red Hat JIRA:

Description

Description of problem:
Setting REX with sudo with effective user password (I assume with REX user password it will be the same), when the password contains some wide characters, REX job fails with output

output: 'Error initializing command: NoMethodError - undefined method `empty?''
for nil:NilClass'

and relevant backtrace in proxy.log

Steps to Reproduce:
1. On a client, configure some user with password containing a wide character (I used password čislo where the č did it)
2. Set the user as a sudoer requiring password
3. Invoke a REX job via ssh with:
effective_user_method: sudo
ssh_user: the-sudo-user
Effective user password : the password from 1.

Actual results:
The REX job fails with below backtrace in /var/log/foreman-proxy/proxy.log:

2024-01-15T11:21:42 [E] error while initializing command NoMethodError undefined method `empty?' for nil:NilClass:
/usr/share/gems/gems/smart_proxy_dynflow-0.8.2/lib/smart_proxy_dynflow/io_buffer.rb:87:in `write_available!'
/usr/share/gems/gems/smart_proxy_dynflow-0.8.2/lib/smart_proxy_dynflow/process_manager.rb:130:in `each'
/usr/share/gems/gems/smart_proxy_dynflow-0.8.2/lib/smart_proxy_dynflow/process_manager.rb:130:in `process'
/usr/share/gems/gems/smart_proxy_dynflow-0.8.2/lib/smart_proxy_dynflow/process_manager.rb:65:in `run!'
/usr/share/gems/gems/smart_proxy_remote_execution_ssh-0.7.3/lib/smart_proxy_remote_execution_ssh/runners/script_runner.rb:327:in `run_sync'
/usr/share/gems/gems/smart_proxy_remote_execution_ssh-0.7.3/lib/smart_proxy_remote_execution_ssh/runners/script_runner.rb:404:in `ensure_remote_command'
/usr/share/gems/gems/smart_proxy_remote_execution_ssh-0.7.3/lib/smart_proxy_remote_execution_ssh/runners/script_runner.rb:167:in `preflight_checks'
/usr/share/gems/gems/smart_proxy_remote_execution_ssh-0.7.3/lib/smart_proxy_remote_execution_ssh/runners/script_runner.rb:147:in `start'
/usr/share/gems/gems/smart_proxy_dynflow-0.8.2/lib/smart_proxy_dynflow/runner/dispatcher.rb:32:in `start_runner'
/usr/share/gems/gems/dynflow-1.6.10/lib/dynflow/actor.rb:13:in `on_message'
..

Expected results:
No such error.

Additional info:
ruby IO sending the wide character reports back it sent multiple chars instead just the one, causing @buffer underflow in io_buffer.rb .