Penetration Testing mailing list archives
RE: [lists] Re: sniffing plaintext protocols
From: "Curt Purdy" <purdy () tecman com>
Date: Mon, 31 Jul 2006 18:39:41 -0400
Dotzero wrote:
User A at IP address 172.16.1.1 connects to a remote host foo.com using telnet by entering "telnet foo.com" from a command prompt which would normally connect to 192.168.1.1 (using RFC 1918 addresses rather than real ones). Evil person B has access to a router that is in the path between user A and the telnet server for foo.com. Evil person B sets up a span port and sniffs traffic to his hearts content....including the telnet session. Note that evil person B is not on the same network segment as either of the endpoints. Obviously, this is a simplified and contrived example that ignores asymetric routing, etc.
<snip> Which is why I require all users to use only SSH with no port 23 allowed at router. Curt Purdy CISSP, GSNA, GSEC, CNE, MCSE+I, CCDA Information Security Officer Information Systems Security infosysec.net 443.846.4231 ------------- If you spend more on coffee than on IT security, you will be hacked. What's more, you deserve to be hacked. -- former White House cybersecurity czar Richard Clarke ------------------------------------------------------------------------------ This List Sponsored by: Cenzic Concerned about Web Application Security? Why not go with the #1 solution - Cenzic, the only one to win the Analyst's Choice Award from eWeek. As attacks through web applications continue to rise, you need to proactively protect your applications from hackers. Cenzic has the most comprehensive solutions to meet your application security penetration testing and vulnerability management needs. You have an option to go with a managed service (Cenzic ClickToSecure) or an enterprise software (Cenzic Hailstorm). Download FREE whitepaper on how a managed service can help you: http://www.cenzic.com/news_events/wpappsec.php And, now for a limited time we can do a FREE audit for you to confirm your results from other product. Contact us at request () cenzic com for details. ------------------------------------------------------------------------------
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- RE: [lists] Re: sniffing plaintext protocols Curt Purdy (Aug 01)