"class101",
As I've stated previously, "No Authentication" must be explicitly configured
and is not enabled by default. What makes you think the servers in question
aren't intended to be configured that way?
FYI, "passworded means it's passworded" isn't really a very helpful
description, given that "password" is a noun! It sounds like dfind's
developers really mean "Is configured to require a password". Again, you
may wish to suggest a change of text to them.
Cheers,
Wez @ RealVNC Ltd.
-----Original Message-----
From: class [mailto:ad@class101.org]
Sent: 20 June 2005 15:58
Cc: James Weatherall; vnc-list@realvnc.com; 'Full-Disclosure'
Subject: Re: RealVNC/WinVNC Multiple vulnerabilities
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Of course, if you think you know of any viable attacks on VNC
servers then feel free to get in touch.
sure I have mailed you a nice list of ip:5900 shomydeskt0p :) funny no
? good lines ? ;)
The output that you've included just seems to show that (assuming
"passworded" means "was able to guess password") your VNC Servers
have been configured with poorly chosen passwords.
passworded mean its passworded , nothing much, my scan doesnt include
any password brteforce, but it show you how easy it is to scan for
your app with "No authentications", who is enough crazy thos days to
add such options ? so easy hacking :)
The output that you've included just seems to show that (assuming
"passworded" means "was able to guess password") your VNC
Servers have been configured with poorly chosen passwords.
-----Original Message----- From: vnc-list-admin@realvnc.com
[mailto:vnc-list-admin@realvnc.com] On Behalf Of
class101@phreaker.net Sent: 19 June 2005 15:35 To:
vnc-list@realvnc.com Cc: Full-Disclosure Subject:
RealVNC/WinVNC Multiple vulnerabilities
Two simple vulnerabilities wich may lead to an os guess + null
session + several others infos while scanning port 5900, low risk
on paper but high online risk:
My 2cent suggestion to the realvnc team would be to totally
remove this "No Authentication" option wich wasnt present in the
oldold winvnc, and to standardize what is answering all your
servers to restrict the private informations guessing.
quick screenshot( of a simple dfind scanning test on a range that
I thought really secured :>):
***.7.41:5900 realvnc4 ssl encryption ***.16.83:5900 realvnc4
passworded (free ed. win32) ***.16.91:5900 realvnc4 passworded
(free ed. win32) ***.16.113:5900 realvnc4 passworded (free ed.
win32) ***.16.163:5900 realvnc4 passworded (free ed.
x86/SPARC/HPUX) ***.16.180:5900 realvnc4 passworded (free ed.
x86/SPARC/HPUX) ***.16.202:5900 RealVNC4 NULL Session (free ed.
x86/SPARC/HPUX) ***.16.237:5900 realvnc4 passworded (free ed.
x86/SPARC/HPUX) ***.22.217:5900 realvnc4 passworded (free ed.
x86/SPARC/HPUX) ***.29.91:5900 realvnc4 passworded (free ed.
x86/SPARC/HPUX) ***.29.92:5900 RealVNC4 NULL Session
(perso/enterp ed. win32 encryption:OFF) ***.29.93:5900 realvnc4
passworded (free ed. x86/SPARC/HPUX) ***.29.157:5900 realvnc4
passworded (perso/enterp ed. win32 encryption:OFF)
***.29.201:5900 realvnc4 passworded (free ed. x86/SPARC/HPUX)
***.29.234:5900 realvnc4 passworded (free ed. win32)
***.35.45:5900 realvnc4 passworded (perso/enterp ed. win32
encryption:ON) ***.40.192:5900 RealVNC4 NULL Session
(perso/enterp ed. win32 encryption:ON)
If you are seeking for more informations and you are from
@realvnc.com, email me, or else look at class101.org and
hat-squad.com
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