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costinel
Joined: 2006-02-28 14:17
Posts: 4
Topics: 1
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#1| Posted: 2006-02-28 15:09 Post subject: bug. old bug. but probably nobody reported it yet |
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open ultravnc viewer (listen mode)
then scan yourself with nmap
http://fac.ce.vreau.eu.org/ultravncbug.jpg
Moderated by redge (2006-03-04 16:03):
Last edited by redge on 2006-03-04 16:03; edited 1 time in total |
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rmoller
Joined: 2004-08-20 09:32
Posts: 100
Topics: 6
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| #2|Posted: 2006-03-01 12:28 Post subject: |
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Working as designed 
It is little known, that the VNCviewer can listen at port 5400 for flash purposes. To verify it, start a VNCviewer in listen mode. Then telnet to 127.0.0.1 5400. Whatever you type will appear flashing fullscreen on the viewer PC.
This is inherited from the very first implementation of VNC at Olivetti Research Lab. They had implemented a roaming freeseating, where everyone carried a radio badge of a kind. Whenever they approached a terminal, their current desktop would appear on it (through a winvnc -connect ip adr.). If you were in a room with many PC's you needed a way to identify the PC with your desktop. Hence the "Flasher" listening port at 5400.
Could be used for teasing  |
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costinel
Joined: 2006-02-28 14:17
Posts: 4
Topics: 1
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| #3|Posted: 2006-03-01 13:03 Post subject: |
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looooooooooool
i did not know that. this is annoying, however, if someone wants to block you from working 
i expected, though, that the listening socket to be closed or communication ignored when i choose 'toggle listen mode on/off' from the systray icon |
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costinel
Joined: 2006-02-28 14:17
Posts: 4
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| #4|Posted: 2006-03-01 13:09 Post subject: |
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is it possible to add an option to make it not listen to 5400 for flash purposes? realvnc does not listen to 5400 by default ....
Last edited by costinel on 2006-03-01 13:10; edited 1 time in total |
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redge
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redge
Joined: 2004-07-03 17:05
Posts: 7893
Topics: 413
Location: Switzerland - Geneva
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| #5|Posted: 2006-03-01 22:08 Post subject: |
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pgmoney made a solution for stop this function
| pgmoney wrote: | Here is the vnc viewer .exe with the -noflash switch and vc6 source.
(256k download)
http://www.advantig.com/files/vncviewer101a4.zip
Usual disclaimer: Use at your own risk, took 10 minutes to modify and has not had much testing... |
source:
Ultra VNC works fine but can't get SC to work
_________________
UltraVNC 1.0.8.2 release (built 20091207)
OS Win: xp pro sp3 + vista business sp2 +7rc ultimate
only experienced user, not developer
Last edited by redge on 2006-03-01 22:09; edited 1 time in total |
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costinel
Joined: 2006-02-28 14:17
Posts: 4
Topics: 1
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| #6|Posted: 2006-03-02 08:01 Post subject: |
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thanks, but i tried accesing the indicated url and i get a 404.
also, googling for "vncviewer101a4.zip" or "vncviewer101a4" gets zero results |
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redge
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redge
Joined: 2004-07-03 17:05
Posts: 7893
Topics: 413
Location: Switzerland - Geneva
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| #7|Posted: 2006-03-04 15:58 Post subject: |
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backup available here
http://www.swiss-adsl.net/redge/vncviewer101a4.exe
_________________
UltraVNC 1.0.8.2 release (built 20091207)
OS Win: xp pro sp3 + vista business sp2 +7rc ultimate
only experienced user, not developer |
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redge
Super-Mod
redge
Joined: 2004-07-03 17:05
Posts: 7893
Topics: 413
Location: Switzerland - Geneva
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| #8|Posted: 2009-01-05 22:33 Post subject: Re: bug. old bug. but probably nobody reported it yet |
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would be happy to have back the function -noflash for vncviewer
_________________
UltraVNC 1.0.8.2 release (built 20091207)
OS Win: xp pro sp3 + vista business sp2 +7rc ultimate
only experienced user, not developer |
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