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Rex-1.16.1
⭐ Starred 717 / Rex::Commands::Augeas
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::Commands::Augeas - An augeas module for (R)?ex

DESCRIPTION

This is a simple module to manipulate configuration files with the help of augeas.

SYNOPSIS

my $k = augeas exists => "/files/etc/hosts/*/ipaddr", "127.0.0.1";

augeas insert => "/files/etc/hosts",
          label => "01",
          after => "/7",
          ipaddr => "192.168.2.23",
          canonical => "test";

augeas dump => "/files/etc/hosts";

augeas modify =>
   "/files/etc/ssh/sshd_config/PermitRootLogin" => "without-password",
   on_change => sub {
      service ssh => "restart";
   };

EXPORTED FUNCTIONS

augeas($action, @options)

It returns 1 on success and 0 on failure.

Actions:

modify

This modifies the keys given in @options in $file.

augeas modify =>
          "/files/etc/hosts/7/ipaddr"    => "127.0.0.2",
          "/files/etc/hosts/7/canonical" => "test01",
          on_change                      => sub { say "I changed!" };
remove

Remove an entry.

augeas remove    => "/files/etc/hosts/2",
       on_change => sub { say "I changed!" };
insert

Insert an item into the file. Here, the order of the options is important. If the order is wrong it won't save your changes.

augeas insert => "/files/etc/hosts",
          label     => "01",
          after     => "/7",
          ipaddr    => "192.168.2.23",
          alias     => "test02",
          on_change => sub { say "I changed!" };
dump

Dump the contents of a file to STDOUT.

augeas dump => "/files/etc/hosts";
exists

Check if an item exists.

my $exists = augeas exists => "/files/etc/hosts/*/ipaddr" => "127.0.0.1";
if($exists) {
    say "127.0.0.1 exists!";
}
get

Returns the value of the given item.

my $val = augeas get => "/files/etc/hosts/1/ipaddr";