lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <40473443.14646.3174CEC@localhost>
From: nick at virus-l.demon.co.uk (Nick FitzGerald)
Subject: Backdoor not recognized by Kaspersky

"Aditya, ALD [Aditya Lalit Deshmukh]" wrote:

<<snip>>
> how about the smtp server simply rejecting mail from spoofed hosts ? as
> all the viruses generate spoofed hosts and it is very easy for any smtp
> server to do a dns lookup on the sending server, if the hostname / ip
> address do not match reject the message.

Because, no matter how much you may not like it, some of us have to use 
spoofing.  It is a designed in feature -- sure a "weakness" by today's 
standards, but not as much of a weakness as the fact that the whole 
Internet as we know it is based on protocols and mechanisms that 
_assume_ physical security and guaranteed locatability of connected 
machines and those with administrative authority over them.  In fact, 
those factors were so deeply ingrained in the original design that I 
doubt anyone involved in spec'ing, designing and implementing what 
became ARPAnet even thought to ask about such issues.

In short, _if_ something was on that network it was _supposed to be 
there_.

Who in their right mind would adopt such a system for "the Information 
Super-highway" and encourage business to "get on the net" when it was 
deployed as an open sewer rather than a self-trusting closed network??

Gluing another layer of "machine authentication" into the SMTP protocol 
won't fix any of the fundamental underlying problems that allow spam 
and mass-mailed viruses to aggrieve us so...


Regards,

Nick FitzGerald


Powered by blists - more mailing lists