S-234: Ultra VNC Vulnerability

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LEARN ABOUT DEBIAN

vnc4passwd

vncpasswd(1)						     Virtual Network Computing						      vncpasswd(1)

NAME

       vncpasswd - change a VNC password

SYNOPSIS

       vncpasswd [passwd-file]

DESCRIPTION

       vncpasswd  allows  you  to set the password used to access VNC desktops.  It stores an obfuscated version of the password in the given file
       (default $HOME/.vnc/passwd).  The vncserver script runs vncpasswd the first time you start a VNC desktop, and invokes Xvnc with the  appro-
       priate -rfbauth option.	vncviewer can also be given a password file to use via the -passwd option.

       The  password  must be at least six characters long, and only the first eight characters are significant.  Note that the stored password is
       not encrypted securely - anyone who has access to this file can trivially find out the plaintext password, so vncpasswd always sets  appro-
       priate  permissions  (read and write only by the owner).  However, when accessing a VNC desktop a challenge-response mechanism is used over
       the wire making it hard for anyone to crack the password simply by snooping on the network.

FILES

       $HOME/.vnc/passwd
	      Default location of the VNC password file.

SEE ALSO

       vncviewer(1), vncserver(1), Xvnc(1) vncconfig(1),
       http://www.realvnc.com

AUTHOR

       Tristan Richardson, RealVNC Ltd.

       VNC was originally developed by the RealVNC team while at Olivetti Research Ltd / AT&T Laboratories Cambridge.  It is now being	maintained
       by RealVNC Ltd.	See http://www.realvnc.com for details.

RealVNC Ltd							    03 Mar 2005 						      vncpasswd(1)

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