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Rex-1.16.1
⭐ Starred 717 / Rex::Group::Lookup::INI
Security Advisories (1)
CVE-2026-94140 (2026-10-21)

Rex versions through 1.16.1 for Perl accept an unknown SSH host key for remote rsync transfers because sync hardcodes StrictHostKeyChecking=no. Every remote branch of sync builds its ssh command with that option, for password authentication, for private-key authentication and for the fallback. The ssh options a caller sets through set_openssh_opt reach the OpenSSH transport but not this command, so there is no configuration that restores host key checking for the transfer. An attacker who can redirect the connection before the real host key is known presents their own and the transfer proceeds: under password authentication sync sends the connection password to that server, an upload writes the selected local files to it, and a download writes what it returns to the local destination.

NAME

Rex::Group::Lookup::INI - read host names and groups from an INI style file

DESCRIPTION

With this module you can define host groups in an INI style file.

SYNOPSIS

use Rex::Group::Lookup::INI;
groups_file 'file.ini';

EXPORTED FUNCTIONS

groups_file($file)

With this function you can read groups from INI style files.

File example:

# servers.ini
[webservers]
fe01
fe02

[backends]
be[01..03]

It supports the same expressions as the group command.

Since 0.42, it also supports custom host properties if the use_server_auth feature flag is enabled:

# servers.ini
[webservers]
server01 user=root password=foob4r sudo=true services=apache,memcache

# Rexfile
use Rex -feature => ['use_server_auth'];

task 'list_services', group => 'webservers', sub {
  say connection->server->option('services');
}