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[UNIX] Solaris Telnet Authentication Bypass


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From: SecuriTeam <support@securiteam.com.>
To: [email protected]
Date: 12 Feb 2007 17:41:49 +0200
Subject: [UNIX] Solaris Telnet Authentication Bypass
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  Solaris Telnet Authentication Bypass
------------------------------------------------------------------------


SUMMARY

 <http://sun.com/solaris/>; Solaris is a computer operating system 
developed by Sun Microsystems. It is certified against the Single Unix 
Specification as a version of Unix.

The Solaris telnet daemon is vulnerable to authentication bypass.

DETAILS

In some Solaris version, the telnet daemon allows authentication bypass.

Following example will log in you to the system with the user "username" 
without asking for credentials.
 telnet -l  "-fusername"  [hostname]

Workaround:
Set telnet to work only with console, disable telnet daemon or block port 
tcp/23.


ADDITIONAL INFORMATION

The original article can be found at:
 <http://blogs.securiteam.com/index.php/archives/814>; 
http://blogs.securiteam.com/index.php/archives/814




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