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Full Discussion: How can you send a file over Ip.NOT EMAIL
Special Forums Cybersecurity How can you send a file over Ip.NOT EMAIL Post 302500876 by Corona688 on Tuesday 1st of March 2011 10:31:27 PM
Old 03-01-2011
Quote:
Originally Posted by orszhak
So I was just wondering... Is there a way to send a file directly to the computer.
There is no direct way. TCP/IP communication is almost invariably programs on one machine communicating with programs on a different machine (or perhaps the same machine), there's no trapdoors that directly instruct the kernel to do anything to files. The only exceptions that leap to mind are network filesystem drivers, and given the number of hoops you have to jump through to get NFS going on purpose, having it happen by accident seems sincerely unlikely! Not to say that there may not be brain-dead distros that have open NFS by default -- but when it's off, it's off, and isn't going to be nudged into running just because someone bothers your network enough. Same goes for any other system daemon capable of creating files -- someone with administrator access actually has to turn it on. Or, someone on the inside can run something on an anonymous port if you haven't firewalled that, but it'll have no more access than the user does...

What's more likely to happen is an exploitation of mundane things. A badly written CGI script could be abused to create and/or execute files in /tmp. (For this reasons some web servers have hardened /tmp/ partitions that literally cannot execute any files in them.) Or a limited account with a weak password gets cracked and they just live in that tiny corner of your machine, connecting to a botnet and cracking passwords for it. And so on. They don't have to crack your whole system to use you, and a smart cracker won't interfere with the operations of your system lest you notice.
Last edited by Corona688; 03-01-2011 at 11:44 PM..
 

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LEARN ABOUT DEBIAN

e2tools

E2TOOLS(7)						 Miscellaneous Information Manual						E2TOOLS(7)

NAME

       e2tools -  utilities to manipulate files in an ext2/ext3 filesystem

DESCRIPTION

       E2tools	is  a  simple  set  of	GPL'ed utilities to read, write, and manipulate files in an ext2/ext3 filesystem. These utilities access a
       filesystem directly using the ext2fs library. I wrote these tools in order to copy files into a linux filesystem on a machine that does not
       have  ext2  support.  Of  course, they can also be used on a linux machine to read/write to disk images or floppies without having to mount
       them or have root access.

       Supported functionality:

       e2cp   copy files

       e2mv   move files

       e2rm   remove files

       e2mkdir
	      create directory

       e2ln   create hard links

       e2ls   list files/directories

       e2tail output the last part of a file

       In general, to specify a directory or file on an ext2 filesystem for the e2tools utilities, use the following form:

	      filesystem:directory_path

       The filesystem can be an unmounted partition or a regular file that's been formatted to contain an ext2 filesystem.  In general, if a  com-
       mand takes multiple file names on the command line, if the first one contains an ext2 file specification, the rest of the files are assumed
       to be on the same filesystem until another one is explicitly stated:

	      /tmp/boot.img:/tmp/file1

	      /tmp/file2

	      /tmp/file3

	      /tmp/boot2.img:/tmp/file4

       Files 1-3 are on /tmp/boot.img and the last file is on /tmp/boot2.img

SEE ALSO

       e2cp(1), e2ln(1), e2ls(1), e2mkdir(1), e2mv(1), e2rm(1), e2tail(1).

AUTHOR

       The e2tools were written by Keith Sheffield <sheff@pobox.com>.

       This manual page was written by Lucas Wall <lwall@debian.org>, for the Debian project (but may be used by others).

								   March 2, 2005							E2TOOLS(7)
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